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Concrete Casting News from the Hill and Griffith Company

Concrete Release Agent Selection for NSF/ANSI 61 Potable Water

Posted by Hill and Griffith Company on May 30, 2019 10:02:33 PM

If you manufacture, sell or distribute water treatment or distribution products in North America, your products are required to comply with NSF/ANSI 61: Drinking Water System Components – Health Effects by most governmental agencies that regulate drinking water supplies.

NSFANSI 61 and Your Concrete Release Agent Selection

Developed by a team of scientists, industry experts and key industry stakeholders, NSF/ANSI 61 sets health effects criteria for many water system components including:

  • Protective barrier materials (cements, paints, coatings)
  • Joining and sealing materials (gaskets, adhesives, lubricants)
  • Mechanical devices (water meters, valves, filters)
  • Pipes and related products (pipe, hose, fittings)
  • Plumbing devices (faucets, drinking fountains)
  • Process media (filter media, ion exchange resins)
  • Non-metallic potable water materials

(From the NSF (National Sanitation Foundation) site.

Benefits of Certification

Certification to NSF/ANSI 61 ensures that your product meets the regulatory requirements for the U.S. and Canada, and it can often meet or fulfill the testing requirements for many other countries as well. Market leaders strive to attain NSF certification as a mark of distinction that provides their customers with assurance that their product is safe for use in drinking water.

NSF/ANSI 61 testing covers all products with drinking water contact from source to tap, and determines what contaminants may migrate or leach from your product into drinking water. It also confirms if they are below the maximum levels allowed to be considered safe.

Certification also allows your company to:

  • List your product in our online directory of certified drinking water system components
  • Use the NSF certification mark on your products and in your promotional materials

Why Work With NSF?

The NSF mark, well respected by public health officials and drinking water utilities, is recognized as a symbol of product quality and integrity. Our responsive, personalized service quickly guides your products through the certification process, ensuring that they get to market on time and on budget. We offer product bracketing services wherever possible to help keep costs down, and we provide pricing up front so there are no hidden surprises down the road.

NSF is accredited by the Standards Council of Canada (SCC) and NSF listings satisfy the requirements of the Canadian National Plumbing Code, U.S. Model Codes and the Uniform Plumbing Code (UPC).

Certification Process

We distinguish ourselves due to our thorough product evaluation, but our certification process is simple and efficient. We assign you a dedicated NSF project manager as a single point of contact to guide you through the certification process and oversee your certification project every step of the way.

Seven Simple Steps to Certification:

  1. Your company submits an application.
  2. You provide product formulation, toxicology and product use information.
  3. Our toxicology department reviews formulations.
  4. We perform a plant audit and sample collection.
  5. Our laboratory conducts testing.
  6. We complete a final toxicology evaluation.
  7. We grant NSF certification for compliant products and you can use the NSF mark on products, packaging and marketing materials.

Our experts can help you reduce overall costs and expedite your time to market by bundling services and reducing the number of contracted service providers and facility audits.

U.S. and Canadian Approvals

Drinking water system components that are used in centralized water treatment plants and water distribution systems up through the water meter are typically regulated by state or provincial drinking water agencies.

Forty-eight U.S. states have legislation, regulations or policies requiring drinking water system components to comply with, or be certified to, NSF/ANSI 61.

Eleven Canadian provinces/territories require drinking water system components to comply with the requirements of NSF/ANSI 61.

Get more information and see a comprehensive map of the U.S. states and Canadian provinces/territories that require NSF/ANSI 61.


For additional information, read these articles published in Precast Inc. by the Hill and Griffith Company:
  • "Biodegradability Redefined and Volatile Organic Compounds Update" by Bob Waterloo, Precast Inc.,
    January/February 2010
    Download Article »

  • Biodegradable, NSF Concrete Form Release Agents Offer a Range of Options for Concrete Applications
    Read More »

Precast Concrete News at NPCA, National Precast Concrete Association

Benchmarking Your Business

Advocating for Infrastructure

Personalize Your Member Experience


Hill and Griffith Customer Service

We're known for our hands on approach. Let us visit your plant and recommend concrete release agents, packerhead concrete form releases, concrete form seasoning, potable water concrete form release, non-petroleum concrete form release, biodegradable concrete form release, rust inhibitors and concrete dissolver products that suit your needs.

Hill and Griffith Samples

Product Samples

We are pleased to provide samples in quantities large enough to allow you to "try before you buy."
Contact Us »

 

Hill and Griffith Customer Service

Technical Services & Support

On-site casting defect investigations, product testing, machine start-ups and much more. Also, lab facilities are available to provide testing upon request.
Contact Us »

 

 Bulletins and Technical Papers for Concrete Casting Products

Tags: Concrete, Casting Solutions, Concrete Casting Products, Concrete Casting Supplies, Concrete Casting, Precast Concrete, Concrete Form Release Agent, American Concrete Institute, NSF/ANSI 61 Potable Water

Grifcote® and Cast-O-Magic® Concrete Form Release Agents

Posted by Hill and Griffith Company on May 17, 2019 4:17:55 PM

The Perfect Release

VOC Compliant, NSF Certified* and Biodegradable Release Agents for All Concrete Applications

20190513 HG_1-2pgH_TPR copy

Industry Leading Performance and Quality

Trained technicians are available to visit your site, determine your needs and design the right product for you.

concrete_ties-1
Gricote FR-50 & PR-SS VOC - Workhorse Release


concrete_potable_water-tower-1
Grifcote LV-50 Plus - NSF Certified for Potable Water Release


concrete_bio_gold_form-1
Grifcote Bio-Gold - Environmentally Friendly Release


concrete_junction_form-1
Grifcote CC-150 VOC - Premium Seasoning Agent

form-release-agent-cast-o-magic-sizes-sq
Cast-O-Magic, Con-Solver and Liquid Chisel

consolver-concrete-dissolver-sq
Corrosion Inhibitor for Steel Forms

Nationwide and International Distribution


Precast Concrete News From the National Precast Concrete Association

• NPCA President Search

• Benchmarking Your Business

• Advocating for Infrastructure


Hill and Griffith Customer Service

We're known for our hands-on approach. Let us visit your plant and recommend concrete release agents, packerhead concrete form releases, concrete form seasoning, potable water concrete form release, non-petroleum concrete form release, biodegradable concrete form release, rust inhibitors and concrete dissolver products that suit your needs.

Hill and Griffith Samples

Product Samples

We are pleased to provide samples in quantities large enough to allow you to "try before you buy."
Contact Us »

 

Hill and Griffith Customer Service

Technical Services & Support

On-site casting defect investigations, product testing, machine start-ups and much more. Also, lab facilities are available to provide testing upon request.
Contact Us »

 

 Bulletins and Technical Papers for Concrete Casting Products

Tags: Concrete, Casting Solutions, Concrete Casting Products, Concrete Casting Supplies, Concrete Casting, Precast Concrete, Concrete Form Release Agent

Grifcote® LV-50 Plus NSF Approved Potable Water Concrete Form Release Agent

Posted by Hill and Griffith Company on May 10, 2019 4:58:27 PM

Potable Water Concrete Release Agent

Grifcote LV-50 Plus was created specifically for use with castings that would be exposed to potable water.

The material is NSF (ANSI 61) approved for use with potable water and some restrictions do apply in specific applications.

Low VOC and Biodegradable Release Agent

  • All Grifcote products are EPA VOC (Volatile Organic Compound) compliant with less than 250 grams per liter of VOCs. Grifcote is compliant in all 50 States and Canada.

  • All are classified as either readily biodegradable, with a half-life of 28 days or less or inherently biodegradable with a half-life of 60 days or less.

  • All products comply with federal or state regulations regarding concrete release agents.

  • "Biodegradability Redefined and Volatile Organic Compounds Update" by Bob Waterloo, Precast Inc.,
    January/February 2010
    Download Article »

  • Biodegradable, NSF Concrete Form Release Agents Offer a Range of Options for Concrete Applications
    Read More »

If you manufacture, sell or distribute water treatment or distribution products in North America, your products are required to comply with NSF/ANSI 61: Drinking Water System Components – Health Effects by most governmental agencies that regulate drinking water supplies.

NSFANSI 61 and Your Concrete Release Agent Selection

The NSF mark, well respected by public health officials and drinking water utilities, is recognized as a symbol of product quality and integrity. Our responsive, personalized service quickly guides your products through the certification process, ensuring that they get to market on time and on budget. We offer product bracketing services wherever possible to help keep costs down, and we provide pricing up front so there are no hidden surprises down the road.

NSF is accredited by the Standards Council of Canada (SCC) and NSF listings satisfy the requirements of the Canadian National Plumbing Code, U.S. Model Codes and the Uniform Plumbing Code (UPC).

U.S. and Canadian Approvals

Drinking water system components that are used in centralized water treatment plants and water distribution systems up through the water meter are typically regulated by state or provincial drinking water agencies.

Forty-eight U.S. states have legislation, regulations or policies requiring drinking water system components to comply with, or be certified to, NSF/ANSI 61.

Eleven Canadian provinces/territories require drinking water system components to comply with the requirements of NSF/ANSI 61.

Get more information and see a comprehensive map of the U.S. states and Canadian provinces/territories that require NSF/ANSI 61.


For additional information on the proper concrete release agent to use for concrete drinking water tanks, read these articles published in Precast Inc. by the Hill and Griffith Company:

Precast Concrete Water Tank posts by Hill and Griffith in Google

Why Precast Concrete Drinking Water Tanks Are The Best

NPCA extends product-specific certification to water, wastewater tanks 

Why Precast Concrete Cistern pH is Important


Hill and Griffith Customer Service

We're known for our hands on approach. Let us visit your plant and recommend concrete release agents, packerhead concrete form releases, concrete form seasoning, potable water concrete form release, non-petroleum concrete form release, biodegradable concrete form release, rust inhibitors and concrete dissolver products that suit your needs.

Hill and Griffith Samples

Product Samples

We are pleased to provide samples in quantities large enough to allow you to "try before you buy."
Contact Us »

 

Hill and Griffith Customer Service

Technical Services & Support

On-site casting defect investigations, product testing, machine start-ups and much more. Also, lab facilities are available to provide testing upon request.
Contact Us »

 

 Bulletins and Technical Papers for Concrete Casting Products

Tags: Concrete, Casting Solutions, Concrete Casting Products, Concrete Casting Supplies, Concrete Casting, Precast Concrete, Concrete Form Release Agent, American Concrete Institute, NSF/ANSI 61 Potable Water, Precast Concrete Drinking Water Tanks

Article review, "The Effects of Concrete Release Agents on the Formwork/Concrete Interface"

Posted by Hill and Griffith Company on May 3, 2019 2:11:59 PM

Fédération Internationale du Béton Proceedings of the 2nd International Congress June 5-8, 2006 – Naples, Italy

Effects of Concrete Release Agents 1

INTRODUCTION

The role of demoulding oils is to prevent the concrete adhering to the steel walls [1]. Because of its extremely fine structure and high lubricity at the very beginning of casting, the cement paste contained in the concrete spreads over the formwork surface and builds up in the asperities. The adhesion of the oil is therefore an important parameter. Another feature of these oils is that they improve the appearance of the facings and the resistance to corrosion of the surfaces of the steel mould and formwork.

This article is by:

Libessart, L., Djelal, C.
Laboratoire d’Artois Mécanique Thermique et Instrumentation, Unviversité d’Artois, TechnoParc Futura – 62400 Béthune, France

De Caro, P.
Laboratoire de Chmie Agro-industriel, UMR1010, INA/INP, ENSIACET, 118 route de Narbonne – 31077 Toulouse Cedex

Dubois, I.
CHRYSO S.A., ZI - 7 rue de l’Europe – 45300 Sermaises

###

Highlights:

Currently the most popular demoulding oils are of mineral origin. However, these products are not very environmentally friendly and cause inconvenience to the users (skin and respiratory tract irritations, inhalation of volatile organic components). Prolonged exposure can inflict irreversible damage recognized as occupational diseases. To resolve these problems, vegetable-based formulations have been developed. A European study [2] was conducted in 1999 to make these agents better known in the building world (SUMOREVA project).

A lack of knowledge of the mechanisms acting at the concrete/wall interface, when demoulding agents are present, means that the formulation of these lubricants remains totally empirical. Manufacturers can but fall back on their experience and site tests which are restrictive and expensive, in order to establish a formulation which best meets users’ requirements.

The aim of this study is to link the physical-chemical properties of mineral or vegetable oil compositions to their mechanical properties when the concrete is laid. Keywords: concrete, release agents, interface, formwork

ESTABLISHING THE CHARACTERISTICS OF THE OILS

The study was conducted on one formulation of mineral origin and one formulation of vegetable origin. The properties of the oils are given in Tab. 1:

The mineral composition comprises a mineral base of paraffin origin. The vegetable composition is formulated from a complex plant ester and an acidifier.

The acid index corresponds to the number of milligrams of potassium (KOH) required to neutralise a gram of oil. In our case, the acid index enables the content to be quantified in COOH carboxylic functions. These functions correspond to free acids, i.e. non saponified. The complex plant esters are prepared by sterification from a fatty acid of plant origin.

Effects of Concrete Release Agents 2

Tab. 1. Properties of the oils

The fatty acids (Fig.1) in contact with an alkaline hydroxide (in this case, lime) are transformed into alkaline carboxylates (soaps). They also catalyse the saponification reaction which generates soaps from an ester and an alkaline hydroxide. In this case, the soap obtained is a calcium salt 2(RCOO)Ca2+. A soap is formed from a long carbonated chain (R) and a carboxylate group (–COO-) called polar head.

 

CHARACTERISTICS OF THE OIL FILM

The demoulding agent must be chosen in relation to the nature of the formwork and the period of use [4], but it is mainly the conditions of application which are the determining factor. Each time a demoulding agent is used, the formwork surfaces must first be thoroughly cleaned. In addition, the demoulding agent must be applied in a fine and continuous film. It is imperative for the demoulding product to cling to the formwork because if it rides up with the concrete during filling, it may cause flaws and air bubbles. A study conducted by a North American demoulding manufacturer shows that the thicker the oil, the more the surface quality of the concrete deteriorates. According to this study, the best results are obtained with a thickness of 10 μm [5].
 
The optimum quantities for mineral-based oils vary from 0.12 to 0.15 litre per m2 [6] and are about 5 to 10 times lower for vegetable-based oils [7]. This is explained by the fact that in the case of vegetable-based oils, the thinner the film, the better it is organized, and consequently its effectiveness is improved. Excessive oil disorganizes the film and impairs its effectiveness.
 
The most suitable application method is spraying, in some cases together with spreading by rubber scraper to remove the excess oil from the single layer.
 
The quality of the oil film was evaluated on the basis of wettability and under an optical microscope.
 
CONCLUSION
 
The mineral oil studied has low viscosity and a good rheological resistance to temperature variations. Moreover, it also has high wettability. Despite these favorable characteristics, more oil has to be sprayed to obtain an even film on the formwork surface. Vegetable oil has a higher viscosity and lower wettability than mineral oil. In addition, at temperatures of below 20°C, its viscosity increases considerably, and this change is detrimental to the application of the oil under winter conditions. On the other hand, its film offers a homogeneous appearance for a small volume of sprayed oil. The friction of the concrete on the formwork is also reduced for vegetable oil because of an organized soap/oil structure at the interface. It is a combination between a chemical effect (saponification reaction) and a physical effect (thickness of the film) which leads to a significant reduction in the friction stresses.
 

ABSTRACT

Release agents are significant source of pollution in the construction and prefabrication industries. Conventional product are known to be toxic for humans and the environment. New formulations based on vegetable esters have appeared on the market to mitigate against this drawback, but more knowledge must be required about the properties and behaviour of these products, and their industry profile is raised. Understanding the phenomena that occur over formwork-oil-concrete interface is a real challenge. This paper begins with a physicochemical survey of release agents by defining the formwork-oil and oil-concrete interfaces. In then characterizes the formwork-oil-concrete interfaces by dynamic studies (tribometer). Physicochemical mechanisms are proposed.


Precast Structural Concrete Reports from International Federation for Structural Concrete

Ductility of Reinforced Concrete Structures

Practical Design of Structural Concrete

Design of Post-Tensioned Slabs and Foundations


Hill and Griffith Customer Service

We're known for our hands on approach. Let us visit your plant and recommend concrete release agents, packerhead concrete form releases, concrete form seasoning, potable water concrete form release, non-petroleum concrete form release, biodegradable concrete form release, rust inhibitors and concrete dissolver products that suit your needs.

Hill and Griffith Samples

Product Samples

We are pleased to provide samples in quantities large enough to allow you to "try before you buy."
Contact Us »

 

Hill and Griffith Customer Service

Technical Services & Support

On-site casting defect investigations, product testing, machine start-ups and much more. Also, lab facilities are available to provide testing upon request.
Contact Us »

 

 Bulletins and Technical Papers for Concrete Casting Products

Tags: Concrete, Casting Solutions, Concrete Casting Products, Concrete Casting Supplies, Concrete Casting, Precast Concrete, Concrete Form Release Agent, International Federation for Structural Concrete

Why Precast Concrete Drinking Water Tanks Are The Best

Posted by Hill and Griffith Company on Apr 25, 2019 4:55:38 PM

Why you should only use a concrete tank to store drinking water

Any water that is stationary will eventually become stagnant and undrinkable. How water is stored and its temperature will determine how long the water stays healthy and drinkable. Spring water is often considered as the best water you can drink, store your water in an underground concrete tank and you are producing your own spring water.

Precast Concrete Drinking Water Tanks
Image from Colorado Precast Concrete.

Why tank water is so acidic

Underground concrete tanks is normally roof harvested rain water, which is naturally acidic. The acidity of normal rain is attributed mainly to carbon dioxide in the atmosphere which gets absorbed as water condenses from a gas to a liquid and it is these liquid droplets that forms clouds and eventually rain. Even in areas that are minimally affected by human pollution, the pH of rain water can range from 4.5 to 5.0 which is fairly acidic.

In built-up areas around cities, above normal acid rain is generally caused by human pollution and in highly polluted cities rain water can become as acidic as lemon juice which causes lots of problems for old historic buildings.

This acidity forms part of the natural process that allows rain water, with the help of microbes found in the soil, to dissolve minerals from the soil into a colloidal form that now makes the water neutral and full of minerals which can then be taken up by plants. Acidic water is however not choosy and will happily do the same thing in the human body. Resulting in the stealing of alkalizing minerals and therefore a net loss of these vital minerals from the body as the water attempts to achieve a more neutral pH balance.

Precast Concrete Potable Water Tanks

Why is concrete the best material to store water in

The very nature of water itself is that it wants to balance out to a neutral pH. and a concrete tank is the only man made storage system that will allow this to happen. To neutralize itself, water will absorb some of the minerals out of the concrete and will generally settle in a slightly alkaline state.

An in-ground concrete water tank will keep the water at the temperature that it fell out of the sky at and if you are in an area that gets mostly winter rain, that cold water will remain cold all summer.

Even above ground, light cannot penetrate through the concrete walls of a concrete and into the water.

All of this become very important, because roof harvested rain water picks up all sorts of dust, bacteria, and bugs and even after being pre-filtered some always gets through.

Water that is alkaline, cold and removed from light will not support the growth of any bacteria that makes its way into your tank, thus allowing this water to stay clean and drinkable for years.

If you cannot put your tank underground, paint it white; or allow ivy to cover it to keep the sun off it and the water will stay very cold.

Yes in time, this leaching of minerals will compromise the integrity of a concrete tank, but a well-made tank is good for a hundred odd years.

(Thanks to Versatile Tanks for this article)


If you manufacture, sell or distribute water treatment or distribution products in North America, your products are required to comply with NSF/ANSI 61: Drinking Water System Components – Health Effects by most governmental agencies that regulate drinking water supplies.

NSFANSI 61 and Your Concrete Release Agent Selection

The NSF mark, well respected by public health officials and drinking water utilities, is recognized as a symbol of product quality and integrity. Our responsive, personalized service quickly guides your products through the certification process, ensuring that they get to market on time and on budget. We offer product bracketing services wherever possible to help keep costs down, and we provide pricing up front so there are no hidden surprises down the road.

NSF is accredited by the Standards Council of Canada (SCC) and NSF listings satisfy the requirements of the Canadian National Plumbing Code, U.S. Model Codes and the Uniform Plumbing Code (UPC).

U.S. and Canadian Approvals

Drinking water system components that are used in centralized water treatment plants and water distribution systems up through the water meter are typically regulated by state or provincial drinking water agencies.

Forty-eight U.S. states have legislation, regulations or policies requiring drinking water system components to comply with, or be certified to, NSF/ANSI 61.

Eleven Canadian provinces/territories require drinking water system components to comply with the requirements of NSF/ANSI 61.

Get more information and see a comprehensive map of the U.S. states and Canadian provinces/territories that require NSF/ANSI 61.


For additional information on the proper concrete release agent to use for concrete drinking water tanks, read these articles published in Precast Inc. by the Hill and Griffith Company:

Precast Concrete Water Tank posts by Hill and Griffith in Google

Why Precast Concrete Drinking Water Tanks Are The Best

NPCA extends product-specific certification to water, wastewater tanks 

Why Precast Concrete Cistern pH is Important


Hill and Griffith Customer Service

We're known for our hands on approach. Let us visit your plant and recommend concrete release agents, packerhead concrete form releases, concrete form seasoning, potable water concrete form release, non-petroleum concrete form release, biodegradable concrete form release, rust inhibitors and concrete dissolver products that suit your needs.

Hill and Griffith Samples

Product Samples

We are pleased to provide samples in quantities large enough to allow you to "try before you buy."
Contact Us »

 

Hill and Griffith Customer Service

Technical Services & Support

On-site casting defect investigations, product testing, machine start-ups and much more. Also, lab facilities are available to provide testing upon request.
Contact Us »

 

 Bulletins and Technical Papers for Concrete Casting Products

Tags: Concrete, Casting Solutions, Concrete Casting Products, Concrete Casting Supplies, Concrete Casting, Precast Concrete, Concrete Form Release Agent, American Concrete Institute, NSF/ANSI 61 Potable Water, Precast Concrete Drinking Water Tanks

Review: "Guide for Surface Finish of Formed Concrete"

Posted by Hill and Griffith Company on Dec 6, 2018 1:05:46 PM

(This week's post is a review of the American Society of Concrete Construction's "Guide for Surface Finish of Formed Concrete." You can read it at Google Books here.)

Amazon Book's summary (April 1, 1999), "Exactly what is a smooth-form finish? What is a rough-form finish? To what extent are bugholes, voids and fins acceptable in each type? This easy-to-use guide explains and illustrates the answers to these questions and, even more importantly, serves as the standard for the differences between as-cast structural concrete finishes. The succinct, yet thorough, text includes a glossary and a handy table on as-cast finishes. But the guide's Presentation Photos are what make it truly unique. Three sets of 6 different, full-scale photographs depict various as-cast finishes, with bugholes and voids ranging from 1/16" or less to 2" across. Attach a Presentation Photo to a bid or specification to show what surface finish is to be expected."

Surface Finish of Formed Concrete.jpg 

 

(Jan 1, 2005 edition from Google Books)

Form Release Agents

Release agents are differentiated from form coatings or sealers that are usually applied in liquid form to contact surfaces either during manufacture or in the field. Coatings and sealers serve one or more of the following purposes:

  • Alter the texture of the contact surface 
  • Improve the durability of the contact surface
  • protect the contact surface from moisture

Release agents, on the other hand, are applied to the contact surface of the forms to prevent bond to the concrete and thus facilitate stripping. They can be applied to form materials during manufacture or applied to the form before each use. Manufacturers' recommendations should be followed in the use of coatings, sealers, and release agents (Reference 10-11), but ACI 347 recommends independent investigation of performance before using a new product.

There is no ACI standard to define these products, but the term form oil is frequently applied to petroleum compounds originally intended for other applications such as diesel fuel or heating oil, while release agent more often refers to products containing proprietary reactive ingredients specifically formulated for use on concrete forms. Release agents are commonly classified on the basis of how they act instead of what is in them. The two basic categories are barrier agents and chemically active agents, sometimes called reactive agents. Some release agents are a combination of the two types.

Barrier type releases agents create a physical barrier between the form surface and the fresh concrete, preventing the concrete from sticking to the form. Familiar examples are home heating oil, diesel oil, and used motor oil. U.S. environmental regulations prohibit the sale of these commodities as release agents, but they have been widely used because they are inexpensive and readily available. They are applied in relatively thick films, covering 200 to 600 sq ft per gallon, and such heavy applications can increase surface staining and bugholes on the concrete surface. If coated forms are left for several days before concrete is placed, barrier oils may evaporate, possibly leading to some sticking of the concrete to the form.

Chemically active or reactive agents contain an active ingredient that may be dissolver in an oil-based carrier or emulsified in a water-based carrier. The active ingredient is typically some type of fatty acid derived from plant or animal sources, and it combines chemically with calcium ions in the fresh concrete. The reaction product is a thin layer of what chemists refer to as a grease or metallic soap or salt; non-water-soluble, it permits the form to release readily from the hardened concrete.

The reactive fatty acid components are generally considered biodegradable and have found favor in the past decade because of increasingly stringent environmental regulations. For similar reasons, manufacturers have also been turning to water-based carriers, which will probably be subject to freezing.

 


Hill and Griffith Customer Service

We're known for our hands on approach. Let us visit your plant and recommend concrete release agents, packerhead concrete form releases, concrete form seasoning, potable water concrete form release, non-petroleum concrete form release, biodegradable concrete form release, rust inhibitors and concrete dissolver products that suit your needs.

Hill and Griffith Samples

Product Samples

We are pleased to provide samples in quantities large enough to allow you to "try before you buy."
Contact Us »

 

Hill and Griffith Customer Service

Technical Services & Support

On-site casting defect investigations, product testing, machine start-ups and much more. Also, lab facilities are available to provide testing upon request.
Contact Us »

 

 Bulletins and Technical Papers for Concrete Casting Products

Tags: Concrete, Casting Solutions, Concrete Casting Products, Concrete Casting Supplies, Concrete Casting, Concrete Safety, Precast Concrete, Bio Gold Concrete Form Release, Gricote, Concrete Form Release Agent

Beware of "Smooth - As Cast" Texture Description - There is no such thing

Posted by Hill and Griffith Company on Dec 3, 2018 5:07:12 PM

The most commonly specified textures for precast include smooth, retarded and water-washed, form-lined, sand- or abrasive-blast, acid-etched or acid-washed, and tooled

Precast Concrete Smooth As Cast Texture and Form Oil

Smooth texture, as the term implies, is an as-cast finish. This texture is a direct result of the quality of the formwork surface. It is the least aesthetically pleasing but the most economical of the surface textures, especially if the surface is to be field painted. Form defects and color non-uniformities are noticeable with this finish texture, air voids are normal, and surface crazing should be expected.

 
 This post is based on a review of the Precast Concrete Manufacturers Association of Texas' informative site and their Designer's Notebook Specification Guidance Part 2.
 
Surface Finish of Formed Concrete
 
 
"Amazon Book's summary (April 1, 1999), "Exactly what is a smooth-form finish? What is a rough-form finish? To what extent are bugholes, voids and fins acceptable in each type? This easy-to-use guide explains and illustrates the answers to these questions and, even more importantly, serves as the standard for the differences between as-cast structural concrete finishes. The succinct, yet thorough, text includes a glossary and a handy table on as-cast finishes. But the guide's Presentation Photos are what make it truly unique. Three sets of 6 different, full-scale photographs depict various as-cast finishes, with bugholes and voids ranging from 1/16" or less to 2" across. Attach a Presentation Photo to a bid or specification to show what surface finish is to be expected."
 
Architectural-Concrete-Form-Release-Agent-9-1
 
 
"A word of warning, exposed concrete is the most difficult finish to achieve. A lot of designers think, "We're just going to cast the concrete, take the forms off and whatever is there, that's what we're going to take." Then, the first forms come off, they look at the concrete and say, "Oh my gosh, that's not what I wanted. What do I do now?" The only thing you can do is either paint it or tear it down and start over again. What I find that most designers want, most architects want when they say, "Exposed concrete", thinking it's not going to be architectural concrete, it's going to be exposed concrete, so it's going to be cheaper. They don't want exposed concrete. They want smooth as-cast architectural concrete, which is the most difficult finish to achieve. 

A word of warning, those of you that either design for exposed concrete or who have to build exposed concrete, what you are asking for and what you are going to receive may be two entirely different things. You have to understand the distinction between the two. 

Whenever somebody tells you that something is "Almost" like something else, you should usually run, don't walk. If exposed concrete is "Almost" like architectural concrete, that's a problem. Run away from those things, don't walk. If you want architectural concrete, specify architectural concrete."

From Precast Concrete Manufacturers Association of Texas:

2018 Best in Precast Concrete Award Program Opens


Hill and Griffith Customer Service

We're known for our hands-on approach. Let us visit your plant and recommend concrete release agents, packerhead concrete form releases, concrete form seasoning, potable water and non-petroleum concrete form release, biodegradable releases, rust inhibitors and concrete dissolver products that suit your needs.

Hill and Griffith Samples

Product Samples

We are pleased to provide samples in quantities large enough to allow you to "try before you buy."
Contact Us »

 

Hill and Griffith Customer Service

Technical Services & Support

On-site casting defect investigations, product testing, machine start-ups and much more. Also, lab facilities are available to provide testing upon request.
Contact Us »

 

Bulletins and Technical Papers for Concrete Casting Products 

Tags: Concrete Form Release Agent, precast concrete surface finish, precast concrete texture

Precast Concrete Producer Profile: Team Elmer, Traverse City, MI

Posted by Hill and Griffith Company on Nov 23, 2018 4:18:25 PM

Welcome to another episode of The Team Elmer's Update, where we take you past the orange barrels and onto the job site.

Precast concrete form oil 1

Manhole structures are vital components when reconstructing a roadway, connecting several underground pipes together, while allowing workers access to those underground facilities, but how was it made? Well, it's actually created ahead of time in a pre-cast production facility.

It's hard to mold things out of concrete in the field. A lot of bridges that you drive over are pre-cast bridge beams, so it basically means a plant took concrete of a certain specification and pre-stress steel, and molded that into a certain size for an application. It's a pre-cast structure. We're making something ahead of time in order to use in the field. The reason that we're using concrete in these applications is for strength and longevity.

 
It basically connects pipe, so you have a sewer pipe coming into a manhole, and a sewer pipe going out, and it allows you access to those pipes and underground facilities. Elmer's makes a variety of pre-cast products. We make pre-cast septic tanks. We make retaining wall blocks. A lot of the outlying plants, we make septic tanks with waste concrete. It depends on the health department code as far as what sizes are allowed in each county. We make 1200 gallon tanks. Some of them are double compartment. The biggest thing that we make probably is manhole structures, which are behind us.
 
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First step is making a manhole is setting up your wire, rolling it, get your rebar out and tied onto it. The grease just fills any cracks where the metal doesn't fit real snug, and then the form oil has to be on there or you would never get the metal back out of your form. The concrete would stick right to it, and then you wouldn't be able to use your form again. Then you would flip it, set it down somewhere, and then strip the skins inside and outside of it, set it back down and redo the process.
 
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Dave calls the concrete dispatch and asks for a load of concrete. The driver comes over and they actually just fill the form up with concrete.

Once you pour it, about eight hours is all you've really got to let it sit before you can pull it again. It all depends on how busy we are. Sometimes we pour certain stuff twice a day.
 
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Dave and Keith have a lot of prep in what they do. They have to put the wire in the structures. They have to put lifting pins in the structures. They have to look at the plans and understand where they're going to put holes in the structures. They either cut those holes or ahead of time, they actually preform them. There's a lot of math behind it, a lot of skill behind it, and a lot of prep. It's not just pouring concrete and walking away.
 
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But our pre-cast capabilities don't end there. Our production facility can also be used for a variety of other miscellaneous projects, including special events to benefit the community.

We recently built a memorial monument structure, which was very exciting. Barry, Dan, Keith and Dave did a very nice job with that. Max headed up that, and it's a really cool thing to go see. But really, you can make anything out of concrete. We do different things every year. It just depends on what the challenge is, and Dave and Keith are up for anything.
 
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Thanks for tuning in to another episode of The Team Elmer's Update. As always, stay safe out there. We'll see you next time.

Don't forget to subscribe, follow us on Twitter, and like us on Facebook. And check out teamelmers.com for more project information.-
 
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Hill and Griffith Customer Service

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Quick Reference Guide To Concrete Form Release Agents

Posted by Hill and Griffith Company on Nov 8, 2018 2:05:50 PM

Concrete form release agent product lines, Grifcote® and Cast-O-Magic® are fast drying, readily and inherently biodegradable.

Technicians are available to visit your site, determine your needs and design the right product for you. Arrange a Casting Solutions® Visit.

Grifcote FR-50-VOC concrete form release agent Grifcote® Workhorse FR-50-VOC is the workhorse for the concrete industry.
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Grifcote PR-SS-VOC concrete form release agent Grifcote® PR-SS-VOC Packerhead Pipe is specifically designed for Packerhead pipe operations and those really tough release jobs. Give us your toughest release challenge and we’ll recommend an economical solution.
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Grifcote LV-50 Plus concrete form release agent Grifcote® LV-50 Plus NSF Potable Water was created specifically for use with castings that would be exposed to potable water. The material is NSF (ANSI 61) approved for use with potable water and some restrictions do apply in specific applications.
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Grifcote Bio Gold non-petroleum concrete form release agent Grifcote® Non-petroleum Bio Gold is a non-petroleum, non-staining concrete form release that is both VOC compliant and biodegradable.
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Grifcote FR-50-VOC concrete form release agent Grifcote® Biodegradable Con 1.1 VOC is a concrete form release specifically designed for the construction/poured in place industry. It is a proprietary blend of organic materials that promotes clean and easy separation from all types of forms while deterring build-up and sticking.
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Grifcote LV-Super concrete form release agent Grifcote® Biodegradable LV-Super is a proprietary blend of vegetable oil base stock (renewable resources) and a highly refined petroleum distillate while incorporating additional reactive materials resulting in superior form release technology. 
 
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Cast-O-Magic 320 Concrete Form Release Agent Cast-O-Magic 320 is a mineral oil based product which excels in architectural wall panels, T and I beams and general precasting where appearance is important, and minimum form clean-up is desired.
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Cast-O-Magic 320 VOC Concrete Form Release Agent Cast-O-Magic 320 VOC is formulated to meet EPA California, Northeast States OTC and Great Lakes VOC regulations. 
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Cast-O-Magic 229 VOC Concrete Form Release Agent Cast-O-Magic 229 VOC is formulated to meet the strictest environmental standards. It is a vegetable oil blend and contains low VOC’s. Its biodegradability allows for little or no storm water run-off implications.
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Cast-O-Magic 205 VOC Concrete Form Release Agent Cast-O-Magic 205 VOC is a high-performance release agent formulated to meet and exceed the strictest environmental standards. It works well on all types of forms - steel, aluminum, plywood, epoxy, coated foam, and urethane.

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Hill and Griffith Customer Service

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We are pleased to provide samples in quantities large enough to allow you to "try before you buy."
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Causes and Fixes for Self Consolidating Concrete Bug Holes, Article Review "Precast Inc." Magazine

Posted by Hill and Griffith Company on Nov 2, 2018 9:52:30 AM

Like a persistent mosquito, one question has plagued precast concrete producers for years: “How can I eliminate bug holes?"

Preventing_Bug_Holes

In the past, this question was much harder to answer, because concrete was placed at a stiffer consistency that required excessive vibration. And excessive vibration sometimes caused more bug holes. After the introduction of self-consolidating concrete (SCC), bug holes(ii) became a less common occurrence. Yet, as a recent online industry discussion revealed, this perturbing problem is still with us.

Let’s focus on production’s tail end

The first thing we all learn about SCC is that it’s a tricky devil to work with. There is no room for error, consistency and control are king, and problems, like bug holes, can have more than one cause.
Most online commentators agree that there are three main causes of bug holes:

1.  Improper selection and application of form release agents
2.  Problems with SCC mix design (cement, water content, viscosity, admixtures)
3.  How SCC is placed in the form

Rather than trying to cover all possible sources of bug holes, I decided, like the online commenters, to focus on form work, placement and form release agents. Attempting to cover complex SCC mix-design issues would be too unwieldy for one article(iii).

National Precast Concrete Association / Precast Magazines / Precast Inc. Magazine / 2014 – May-June / Causes & Fixes for SCC Bug Holes / Causes and Fixes for SCC Bug Holes

By John Pelicone, June 2, 2014 

Two types of release agents

1.  Chemically reactive agents: When a chemically reactive form release agent is used, a nonviolent chemical reaction takes place when fatty acids react with free lime on the surface of fresh concrete. This reaction results in the formation of a metallic soap, a slippery material that allows air bubbles to rise along the vertical surface. This “soapy” film also prevents the hardened concrete from adhering to the forms during stripping.

2.  Barrier release agents: Thicker coatings on forms are typical of the older barrier-type materials, like heavyweight used motor oil, vegetable oils, diesel fuel and kerosene. Barrier type release agents are less expensive than chemically reactive agents, but they are not generally recommended for reducing SCC bug holes.

A problem with the heavier, thicker barrier agents is that the flowing SCC may actually push the release agent down the vertical face of the form, thereby enfolding or entrapping air pockets that lead to surface bug holes.

(The article continued with comments from industry leaders.)

Bob Waterloo, technical sales manager, Hill & Griffith Co., Indiana (hillandgriffith.com)

“Training. I’m a huge proponent of training workers on proper application. ‘Thinner is better’ is what I advise plant workers during my training sessions.

“Here’s an analogy: Think about waxing your car. You put on a thin coat and then buff it out; it’s the same with release agents. In fact, the coating should be thinner than a wax finish on a car.

“But do workers always take the time to mop or rub down forms after spraying? Labor is a major expense for all precasters, and the person prepping forms may not follow proper application methods if he knows the forms are needed in production ASAP.”

So in conclusion, let’s summarize the industry’s consensus from for preventing SCC bug holes in three points:

1.  Use the thinnest application possible of a quality form-release agent, using superior sprayer equipment (pumpers maintained at proper pressure and sprayer tips/nozzles in good condition);
2.  Maintain proper SCC placement from one pour location in the form, remembering that a slower placement rate allows entrapped air to escape; and
3.  Maintain forms in clean condition.

Read the whole article here. 


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Precast Show - February 28 – March 2, 2019 – Louisville, Ky. Kentucky International Convention Center Visit The Hill and Griffith Company at Booth#739


Hill and Griffith Customer Service

We're known for our hands-on approach. Let us visit your plant and recommend concrete release agents, packerhead concrete form releases, concrete form seasoning, potable water and non-petroleum concrete form release, biodegradable releases, rust inhibitors and concrete dissolver products that suit your needs.

Hill and Griffith Samples

Product Samples

We are pleased to provide samples in quantities large enough to allow you to "try before you buy."
Contact Us »

 

Hill and Griffith Customer Service

Technical Services & Support

On-site casting defect investigations, product testing, machine start-ups and much more. Also, lab facilities are available to provide testing upon request.
Contact Us »

 

Bulletins and Technical Papers for Concrete Casting Products 

Tags: Concrete Casting Supplies, Concrete Form Release Agent, Concrete Bugholes

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