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Concrete Casting News from the Hill and Griffith Company

Do I need to remove concrete release agent from rebar?

Posted by Hill and Griffith Company on Nov 16, 2018 11:20:02 AM

No. A common misunderstanding in the concrete industry is clarified in this review of an article from ForConstructionPros.com.

Question: On several of our most recent projects, the inspector has been complicating our pour schedule when finding form oil over-sprayed on the rebar. Is it our misunderstanding that form oil on rebar shouldn’t pose a problem to the performance or the acceptance of our pre-pour inspection?

Answer: Your question addresses a common problem across the construction industry. Code edition after code edition presents challenges throughout the industry to remain current with the latest acceptable practices. This is a question of appropriate code reference — ACI 332 — rather than ACI 318, and of referencing the most recent version, ACI 332-10, instead of older versions -04 or -08.

Highest quality precast concrete plant -2

Stated in section 4.2.4 of ACI 332-10, the code provides:

"4.2.4 Surface conditions of reinforcement—At the time concrete is placed, deformed bar and welded wire reinforcement shall be free of materials deleterious to development of bond strength between the reinforcement and the concrete."

"R4.2.4 Common surface contaminants such as concrete splatter, rust, form oil, or other release agents have been found not to be deleterious to bond."

First, during construction, nothing should be found on the reinforcement that would adversely affect the bond strength of the reinforcement in the concrete. Second, what common site conditions found on rebar are not to be considered deleterious to bond. Form oil is a surface contaminant that is not considered deleterious to bond.

Deformed bar and welded wire are designed to achieve a mechanical bond with the concrete rather than a chemical or adhesive bond. The mechanical bond relies on a keying action with the deformations along the length of the reinforcement bar. As long as the surface contaminants do not effectively eliminate the presence of those deformations, they would not be considered deleterious to bond.

ACI 332-10 is available through the bookstore at www.concrete.org.

To read the full article about concrete form oil on rebar go to, "Oil on Rebar."


The Hill and Griffith Company also works closely with pipe and form equipment manufactures to provide optimum concrete release characteristics with their equipment.

All Grifcote products are readily biodegradable, which means they have a half-life of 28 days or fewer. And by definition, all Grifcote products are inherently biodegradable with a half-life of 60 days or fewer.

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 Products, Concrete Casting Supplies, Concrete Release Agents, Grifcote, Precast Concrete Form Release, Concrete Form Release Application, Form Release Application, Concrete Form Oil

New Benefits for NPCA Certified Plants Coming Soon. What is Biodegradable Form Release?

Posted by Hill and Griffith Company on Apr 27, 2018 1:07:10 PM

The Producer Portal

The National Precast Concrete Association Quality Assurance Committee announced improvements to the NPCA Plant Certification program that will make it easier than ever to organize and save your production documents. Available for certified plants, this free member service is located in the plant documents section of the Producer Portal.

The new section matches the table of contents of the NPCA Quality Control Manual for Precast Concrete Plants, making it easy to organize and store the current and historical quality-related documents that are required by the plant certification program. The portal is secure and confidential. The only people who can see the documents are designated plant employees, NPCA program administrators and the plant certification auditor. This enhancement enables plants to upload and organize documents specific to each chapter, section and subsection of the manual.

Log in to the Producer Portal at precast.org/certification and choose Plant Documents from the menu on the left side of the screen to explore the options. To access historical data, simply choose Archived Documents from the drop-down list at the top of the page. To navigate between sections, use the “jump to” feature.

For more information or help logging in, contact Andi Pierce.

NPCA Offers New Water and Wastewater Tank Product Certification

If you manufacture precast concrete tanks, NPCA’s new ANSI-accredited product listing will take the certification of your tanks to a new level. ANSI has granted NPCA a program scope extension of the Plant Certification program to offer the product-specific listing exclusively for water and wastewater tanks.

By obtaining a product listing for your tank models, you give specifiers the assurance that your products are designed and manufactured to applicable industry standards and ensure you are able to supply products in areas where a listing is required. While plants interested in participating must be NPCA certified, there is no additional cost to be listed. This optional program goes beyond plant processes with additional criteria such as a watertightness test of a randomly selected tank. In addition, tanks models listed will appear on the NPCA website during member searches so specifiers can see which models are listed by your plant.

Plants opting for product certification must submit a complete package of information based on the most current applicable ASTM and industry standards. The detailed submittal covers criteria such as materials and manufacture, structural design, physical design, quality control, performance testing data, and dimensional details including tolerance and product marking. For more information, contact Phillip Cutler, P.E., NPCA’s Director of Quality Assurance Programs.


What-is-biodegradable-form-release-agent-report

What is Biodegradable Form Release Agent?

One definition of “biodegradability” can be found in the EPA 1998, “Fate, Transport and Transportation Test Guidelines, Office of Prevention, Pesticides and Toxic Substances (OPPTS) 835.3100, Aerobic Aquatic Biodegradation”; and in EPA 712-C-98-O and ASTM D-5864-00, “Standard Test Methods for Determining Aerobic Aquatic Biodegradation of Lubricants or Their Components.” This reference gives everyone the guidelines to be followed when determining biodegradability and using the word “biodegradable” in claims relating to various products, including concrete form release agents. The U.S. EPA definition includes an allowable “28-day half-life” of materials in order to be considered biodegradable. Half-life is the time required for the decay of one-half of a given component in a system.


Precast Concrete in the Google News Feed:

The precast concrete market is projected to grow at a CAGR of 5.96%

Architect and Builder Agree: Precast Concrete Foundations Ideal Start for Affordable Housing Project


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, Concrete Form Release, Concrete Casting Supplies, Form Release, Concrete Form Oil, Biodegradable Concrete Form Release

Precast Prestressed T Form Construction Video, including concrete form oil application

Posted by Hill and Griffith Company on Apr 20, 2018 12:49:25 PM

Learn how a double tee structural prestressed concrete member is plant produced.

Thanks to the Florida Precast Concrete Association.

This video will explain the entire process of producing a prestressed concrete unit at a prestressing plant, in this case, a double T. A double T is used primarily in parking structures, but can be used in virtually any type of building including office buildings, industrial buildings, and schools to name a few.

Pre-Cast-Double-T-1

 

Randy Neumeyer: Double Ts are kind of a unique product with having the capability of having a very long span. When we start talking long spans, you're talking 60 feet plus, and sometimes go as high as 120 feet.

Narrator: The typical day of a prestressing plant usually starts very early in the morning. The product from the previous days' casting has cured by now, and the pieces need to be stripped from the form to get ready for today's casting.

For any prestressing plant, it is very important to maintain a clean plant. Maintaining neatness is not only positive from an image standpoint, but also from a safety standpoint, since any debris that might be leftover from the day before could create a tripping hazard or other safety problem.


Resources from the Florida Precast Concrete Association

Why Precast?

Designing with Precast Concrete


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, Concrete Form Release, Concrete Casting Supplies, Form Release, Concrete Form Oil

Do I need to remove concrete form oil from rebar?

Posted by Alli Myers on Jul 12, 2017 10:11:03 AM

No. A common misunderstanding in the concrete industry is clarified in this review of an article from ForConstructionPros.com.

Question: On several of our most recent projects, the inspector has been complicating our pour schedule when finding form oil over-sprayed on the rebar. Is it our misunderstanding that form oil on rebar shouldn’t pose a problem to the performance or the acceptance of our pre-pour inspection?

Answer: Your question addresses a common problem across the construction industry. Code edition after code edition presents challenges throughout the industry to remain current with the latest acceptable practices. This is a question of appropriate code reference — ACI 332 — rather than ACI 318, and of referencing the most recent version, ACI 332-10, instead of older versions -04 or -08.

concrete form oil.jpg

Stated in section 4.2.4 of ACI 332-10, the code provides:

"4.2.4 Surface conditions of reinforcement—At the time concrete is placed, deformed bar and welded wire reinforcement shall be free of materials deleterious to development of bond strength between the reinforcement and the concrete."

"R4.2.4 Common surface contaminants such as concrete splatter, rust, form oil, or other release agents have been found not to be deleterious to bond."

First, during construction, nothing should be found on the reinforcement that would adversely affect the bond strength of the reinforcement in the concrete. Second, what common site conditions found on rebar are not to be considered deleterious to bond. Form oil is a surface contaminant that is not considered deleterious to bond.

Deformed bar and welded wire are designed to achieve a mechanical bond with the concrete rather than a chemical or adhesive bond. The mechanical bond relies on a keying action with the deformations along the length of the reinforcement bar. As long as the surface contaminants do not effectively eliminate the presence of those deformations, they would not be considered deleterious to bond.

ACI 332-10 is available through the bookstore at www.concrete.org.

To read the full article about concrete form oil on rebar go to, "Oil on Rebar."


The Hill and Griffith Company also works closely with pipe and form equipment manufactures to provide optimum concrete release characteristics with their equipment.

All Grifcote products are readily biodegradable, which means they have a half-life of 28 days or fewer. And by definition, all Grifcote products are inherently biodegradable with a half-life of 60 days or fewer.

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 Products, Concrete Casting Supplies, Concrete Release Agents, Grifcote, Precast Concrete Form Release, Concrete Form Release Application, Form Release Application, Concrete Form Oil

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