The Hill and Griffith Company
1085 Summer Street - Cincinnati, OH 45204
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Concrete Casting News from the Hill and Griffith Company

Concrete Release Agent Comparison Chart

Posted by Hill and Griffith Company on Oct 19, 2017 4:34:53 PM

 
 

This post is a review of a Concrete Construction Magazine article titled, "Contractors’ guide to form-release agents." 

Form-release agents or form oils cost but a small fraction of the cost of the formwork itself, but they have a big influence on the quality and success of the concrete surface.

Though no American Concrete Institute or ASTM standards define these products, common usage suggests that form oils are petroleum compounds originally designed for other applications (such as diesel fuel, heating oil, and lubricating oils), and release agents are materials containing proprietary reactive ingredients specifically formulated for use on concrete forms. ACI 301-96, “Standard Specification for Structural Concrete,” does, however, give performance-based requirements for release agents. Section 2.2.1.30 says to use “commercially manufactured form-release agents that will prevent formwork absorption of moisture, prevent bond with concrete, and not stain concrete surfaces.”

Today, contractors can choose from among hundreds of form-release products, and new ones are still being developed. Many changes have been introduced as manufacturers have scrambled to meet federal and state environmental regulations, particularly concerning volatile organic compounds (VOCs). With the myriad form-release products available, how do you select the best one for a particular application? Here are a few of the fundamental questions you should ask:

  • On what form surfaces can it be used?
  • Will it provide clean, easy release without damage to either the concrete or the form?
  • Will it produce a stain- and blemish-free concrete surface?
  • Is it compatible with admixtures in the fresh concrete and with surface coatings that may be applied later to the hardened concrete?
  • Is it ready for use without site mixing, and is it easy to apply at anticipated job site temperatures?
  • Is it user-friendly and compliant with environmental regulations?

Concrete release agent comparison chart section of Hill and Griffith Products

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To read the entire article go here.


Concrete in the News:

Concrete manufacturer adds 100 jobs in Greenville - WSPA.com

 

Largest Gathering of Canada's Cement and Concrete Industry Heads to Parliament Hill to Deliver One Message: "Build ...


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 release agents, concrete casting supplies, Grifcote, Precast Concrete Form Release, Concrete Form Release Application, Form Release Application, Water Based Concrete Form Release, Precast Concrete Buildings, Concrete Casting Technical Support, Precast Concrete Careers

Building the Future, Precast Concrete Careers

Posted by Hill and Griffith Company on Oct 15, 2017 2:35:58 PM

From the NPCA, "For more than two decades, the National Precast Concrete Association Foundation has provided educational scholarships to undergraduate and graduate students enrolled in civil engineering, architectural and construction-related curricula, for Precast Concrete Careers.

Our Foundation’s mission is to support the growth and enhance the development of the precast concrete industry by providing opportunities using educational initiatives and incentives. Download the Foundation’s scholarship poster to learn more or to spread the word about the program.

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Transcript of the video:

Kirby: Precast concrete is a very unique product. Concrete is the most used material in the world.

Moffette: Precast is characterized by a company that pours concrete in a controlled environment.

Mimi: The world is full of precast concrete. Everywhere that you look.

Mark: Whether it's municipal, commercial, residential, agricultural, the funeral industry, the military market, it's just amazing the things that are going on.

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Mimi: It's everywhere around us and it certainly is a very important product.

Jim: Precast Concrete is an amazing industry in that first of all we're working with a very unique material, a material that lasts for centuries.

Aaron: The industry in itself is endless. I mean there are so many new products that are coming out.

Joan: It is an industry that is strong with relationships that offers excellent opportunities.

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Randy: I think one of the really unique things about the precast concrete industry is the community of precasters that exist throughout North America.

Barry:The type of individual that we look for is someone who has a desire to not only achieve but wants to work and be able to produce.

Greg: So we're very proud that as an industry, we've taken it upon ourselves to provide learning opportunities to really get the deeper learning that is required to really excel at this thing called precast concrete manufacturing.

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Dan: One of the neat things about the foundation is it supplies scholarships to people who may want to do something that has an impact on our industry.

Jim: If you want to be involved in something that will live throughout your lifetime and have a piece of that I think the industry's definitely for you.

Mark: There's always going to be a need and in that respect I think the future is extremely bright.
Aaron:

Tie that into the fact that this is one of most diverse industries in the world and you have something that's just absolutely limitless. You can go anywhere with it.

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Joan: You don't get up and do the same job everyday. I never had two identical days in almost 30 years in the industry and that's part of the fun.

Greg: I am very proud when I play a role in something that I can drive by and say, "You know, I had something to do with building that." And I know being made out of precast concrete, 100 years from now, it's likely still to be there.

Ty: That is a lasting legacy that not anybody in just any industry can do. I mean you're making a difference in the lives of people in the world when you work in concrete.

Speaker 13: For those interested in career opportunities as well as scholarships, please visit the National Precast Concrete Associations Educational Foundation web site.

 


Concrete in the News:

The Rock Solid History of Concrete

Master & Dynamic's concrete speaker is part art piece, part room shaker

Ultra-thin, curved concrete roof generates solar power

 


 

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 release agents, concrete casting supplies, Grifcote, Precast Concrete Form Release, Concrete Form Release Application, Form Release Application, Water Based Concrete Form Release, Precast Concrete Buildings, Concrete Casting Technical Support, Precast Concrete Careers

Top Ten Concrete Casting Release Agent News Posts

Posted by Hill and Griffith Company on Oct 5, 2017 5:19:32 PM

The following are our top ten Concrete Casting Release Agent News Posts. Enjoy!

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#1 GRIFCOTE® FR-50-VOC Concrete Form Release: The Workhorse for the Concrete Industry

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#2 Concrete Bug Hole Prevention

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#3 New Safety Data Sheet Regulations for Concrete Form Releases

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#4 Coming Untied - New Precast Concrete Railroad Tie System

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#5 Care of Forms and Use of Concrete Form Release Agents

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#6 Skin Related Issues in the Precast Concrete Industry

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#7 Choosing wrong release agent creates concrete bug holes

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#8 Cleveland Rocks with Grifcote FR 50 Concrete Form Release

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#9 Review: "Guide for Surface Finish of Formed Concrete"

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#10 Do I need to remove concrete form oil from rebar?

 

Concrete in the News:

Lack of Compatibility in Admixtures Could Harm Concrete Durability

This concrete espresso machine is countertop Brutalism

Border agency unveils first pictures of concrete wall prototype

 

 

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 release agents, concrete casting supplies, Grifcote, Precast Concrete Form Release, Concrete Form Release Application, Form Release Application, Water Based Concrete Form Release, Precast Concrete Buildings, Concrete Casting Technical Support

Form Seasoning Concrete Release Reduces Cleanup

Posted by Hill and Griffith Company on Sep 27, 2017 9:55:15 PM

Application of form seasoning concrete release agents on mixers and equipment reduces labor and cleanup at the end of the day eliminating concrete adhering to the equipment.

Colle Spa - Technology and Equipment for Concrete Products - Makes molds for the production of tubes, tubs, wells and other specialty products, even on specific customer design. The mold molding system is based on the principle of collapsible internal core and the openable outer shell by means of hydraulic or mechanical devices. Video shows the application of form release to pouring guide. 

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The Hill and Griffith Company's brand is Grifcote® CC-150-VOC Form Seasoning Concrete Release.

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 release agents, concrete casting supplies, Grifcote, Precast Concrete Form Release, Concrete Form Release Application, Form Release Application, Water Based Concrete Form Release, Precast Concrete Buildings, Concrete Casting Technical Support

News from Sales & Operations - Concrete Casting Technical Support

Posted by Hill and Griffith Company on Sep 21, 2017 4:00:54 PM

New Technical Representatives and Mike Lawry's appointment to Vice President of Sales and Operations

Dear customers and friends of The Hill and Griffith Company,

It's been a busy year here at The Hill and Griffith Company. We've had a successful foundry & precast concrete events and just finished up the die casting show this week. Here are some new concrete casting technical support team members you'll meet soon and for sure at the next show.

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I’m pleased to announce the hiring of Doug Schwall for the Northern Indiana territory for sales. Doug comes to us with 20+ years of machining, die casting and maintenance experience as a hands-on manager. His duties will include die casting, foundry, concrete and machining with an emphasis on new customers and growth to existing accounts in the area. Doug’s understanding of the area and key personnel will be a tremendous asset with growing this territory to its fullest potential. Doug’s contact info:  

Doug Schwall
The Hill and Griffith Company
Technical Representative
317-313-4059
dschwall@hillandgriffith.com
 

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And I’m pleased to announce the hiring of Angela Cox for the Northern Illinois/Wisconsin territory for sales.  Angela comes to us with 15+ years of die casting, machining and industrial chemical sales experience. Angela’s contact info:

Angela Cox
The Hill and Griffith Company
Technical Representative
931-216-2026 Mobile
acox@hillandgriffith.com
 

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Also, I’m pleased to announce the hiring of Rodney Schisler for the Southwest Ohio territory for sales. Rodney comes to us with 28 years of die casting and low-pressure casting experience as a hands-on manager. His duties will include die casting, foundry, concrete and machining with an emphasis on new customers and growth to existing accounts in the area.  Rodney’s past experiences will be a tremendous benefit with his process knowledge and will be utilized in other territories as needs arise. Rodney’s contact info:
 
Rodney Schisler
The Hill and Griffith Company
Technical Representative
513-503-3314
rschisler@hillandgriffith.com

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One last thing, my new title is VP of Sales & Operation. After 26 years with The Hill and Griffith Company, I look forward to improving our sales and service even more in our core markets as well as new ones. My door is always open, so contact me at any time with any concern or a new idea to help make your job easier. My contact info:

Mike Lawry
The Hill and Griffith Company
VP of Sales & Operation
317-727-8276
mlawry@hillandgriffith.com

Sincerely,

Mike Lawry


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 release agents, concrete casting supplies, Grifcote, Precast Concrete Form Release, Concrete Form Release Application, Form Release Application, Water Based Concrete Form Release, Precast Concrete Buildings, Concrete Casting Technical Support

Are 100% Precast Concrete Buildings The Future?, CP/PC Article Review

Posted by Hill and Griffith Company on Sep 14, 2017 1:26:57 PM

Total precast concrete buildings are becoming a popular choice for many construction projects. Architectural and structural precast, prestressed concrete components can be combined to create the entire building.

This design approach can take several forms, including precast columns and beams with panelized cladding or load-bearing precast walls and double tee or hollow core flooring. These advantages benefit every member of the construction team - specially the owner, whose goals are always paramount.

Content from the Canadian Precast Concrete Institute. Their manufacturing members number 41, with 58 plants throughout Canada with over 350,000sq. m of plant space available for producing the precast concrete you require for your project.

Precast Concrete Buildings

ARCHITECT: In addition to helping to meet all of the building owner's goals, total precast concrete systems provide specific advantages to architects that can make the design process smoother.

CONTRACTOR: General contractors find the use of precast concrete components make their job easier at the site, ensuring a smooth process for the owner and designer in both the short and long terms. There are fewer trades to coordinate with precast construction.

ENGINEER: Structural engineers report no difficulty in learning to design with total precast concrete systems. They also benefit from the material's ease of use and efficiency.

Fast Construction
Developers who use total precast systems say precast can shorten the project timetable six to eight weeks when compared with steel and even more when compared with cast-in-place concrete construction. That savings can be critical in bringing a new building into a competitive marketplace or in meeting a tenant's need for occupancy on a specific date. A total precast system's speed helps keep projects on track.

Scheduling advantages:

  1. One-stop shopping sources much of a building's shell in one efficient, precast contract.
     
  2. Fabrication of precast elements during permitting and/or site preparation saves time resulting in fast efficient construction regardless of weather conditions.
     
  3. Designing precast systems is easier, thanks to assistance from CPCI member’s engineering department.
     
  4. Precast components can be erected in winter conditions, maintaining tight schedules.
     
  5. With total precast systems, speedy erection allows the contractor to enclose the building quickly, giving interior trades faster access.
     
  6. Precast components are naturally fire protected, because they will not burn. Precast's inherent fire resistance eliminates the messy and time-consuming fireproofing required for a steel structure and subsequent repairs caused by other trades.

Aesthetic Variety
Precast concrete panels offer a wide range of styles. Panels can be produced in a variety of colors, textures and finishes providing an almost endless range of aesthetic options. Precast panels can replicate granite, brick or stone, achieving a strong, institutional image at a fraction of the cost.

High Quality
CPCI members supply precast concrete components certified in accordance with CSA A23.4 Precast concrete – Materials and construction. Tight control ensures that components are produced with uniform consistency.

Low Maintenance
Precast structures require less maintenance than buildings built using other materials. Incorporating the architecture into the structure using large panel sizes, minimizes the number of joints.

Effective Pricing
Because of precast concrete's tightly controlled and shorter production process, costs can be more accurately estimated earlier in the process. Changes during design development can be quickly reassessed by CPCI member engineering departments to verify that estimates remain stable. The contractor, owner and design team are assured that project budgets remain sound.

Precast Concrete Buildings

Safety
Precast construction keeps the site cleaner and eliminates trades from the construction zone, improving logistics and enhancing worker safety. Site storage is usually not required – precast components are lifted by crane directly from the truck into position in a building. A clean site is particularly vital on building additions and existing campuses and in dense urban areas, where adjacent businesses can maintain near-normal activities.

Early Input
Precast manufacturers support design and coordination at the schematic stage. CPCI members can ensure the building takes full advantage of state-of-the-art fabrication and connection techniques. This input allows the project to remain cost-effective and efficiently designed.

Interior Design Flexibility
Long-span precast concrete systems help building owners adapt to changing client needs in future years. Hollow core slabs and double tees can span 14 to 16 m (45 to 50 ft) to match typical composite-steel framing and minimize the need for interior columns required with cast-in-place systems. Precast can span as far as 21 m (70 ft) to provide flexibility for challenging interior requirements. Precast also provides high loading capacity at little added cost.

Precast Concrete Buildings

Efficient Design
CPCI members can provide early and precise design assistance to help select the most efficient sizes and shapes for components, for structural efficiency and optimization for casting, transporting and erecting precast components. Member repetition reduces form costs and aids design speed while retaining design flexibility. These cost efficiencies can free up more of the budget for other critical design areas.

Strong Finish-Approval Process
Precasters can provide finish samples, range samples and large-scale mockups, ensuring that design concepts translate into reality. Designers can inspect window interfaces, joint connections and other critical elements to ensure they are visually acceptable and will properly interface between trades. Plant visits to discuss technical and aesthetic concerns provide control without requiring constant site supervision.

Green Design
Precast concrete offers a number of benefits that make it environmentally friendly a growing need as the Leadership in Energy & Environmental Design (LEED Canada) criteria become more popular. Precast’s energy efficiency, recyclability, reusability along with minimal waste in the precast plant and on the jobsite are keys to meeting environmental standards that are gaining client interest.

Precast offers high thermal mass that has become a feasible element of building design. With precast's ability to aid in meeting LEED standards, the benefits of thermal mass will become more apparent to designers in the future. The use of fly ash, slag and other waste materials aid its environmental friendliness. Precast’s high durability produces buildings with a total service life that far outpaces other designs.

Construction Speed
Time is money for the entire construction team. Precast concrete's speed through design, fabrication and erection help meet tight deadlines. This particularly aids contractors when permitting processes slow down or unforeseen delays arise at the site due to soil conditions or other factors. Precast structural systems are ready to be erected when the foundations are prepared.

All-Weather Construction
Contractors can minimize the added "cushion" created in schedules to accommodate bad weather conditions, since precast components can be produced and erected all year round.

Precast Concrete Buildings

Efficient Erection
Because precast concrete pieces are fabricated in precast plants under controlled conditions using high-quality materials, designs more exactly meet specifications. Field adjustments are reduced, creating a smooth erection process with minimal surprises.

AII-In-One Components
Total precast concrete systems allow the architectural panels to serve structural functions, limiting the need to incorporate multiple materials and trades. Combining architecture and structure provides efficiencies in a building’s lateral support systems. Spandrel panels can support floor systems and windows while providing architectural exterior finishes. Precast elevators and stair cores can support floor systems while providing secure and fire rated enclosures.

Comprehensive Drawing
A total precast concrete system ensures one-stop shopping for the entire core/shell design. CPCI members can design and supply the entire system, generating a better coordinated set of drawings to allow construction to proceed more efficiently. This eliminates the added effort needed to coordinate various trades when using mixed systems controlled by different suppliers.

Easy Handling
Site construction moves smoothly because no special equipment or techniques are required to transport or lift a combination of structural and architectural components. These types of activities can often require additional structural review and exposure to risk.

Shape and Design
Precast/prestressed components are custom manufactured to match design requirements. Unusual shapes, sizes and specific technical requirements are expertly fabricated in CPCI member precast plants. Repetition of shapes and sizes will greatly enhance the economical use of precast components.

Precast Efficiency
The continuous, uninterrupted erection of precast structural components lends itself perfectly to fast track construction schedules. Savings on financing costs, (faster return on investments resulting from bringing the structure into productive life sooner) is just one of the benefits provided by a complete precast building system.

Precast Structural Components
Precast concrete beams, columns and stairs are the ideal solution for owners and builders who want to achieve wide-open spans, fire resistance, energy savings and attractive design with one structural system.

These components are suitable for both low and high-rise structures. Highly durable, these concrete units can be installed in all weather conditions.

Precast beams may be either continuous with single story columns or single span beams with multi-story columns. The use of standardized forms accelerates the manufacturing process.

The quality of smooth formed finishes produced in a precast plant saves money by allowing designers to expose the structure in a finished building.

SINGLE-SOURCE PROVIDER:
As a single unit, even with stone or brick inset, precast panels require only one source to create the entire exterior wall system. When a precast structural system of columns, beams and double tees also is specified, it concentrates the complete shell construction with one certified and reliable producer. This approach ensures all of the responsibility and accuracy for meeting design specifications rests with one supplier. Consistency, tolerances, deadlines, budget and other requirements are assured.

Precast's advantages are maximized when the precaster is brought onto the design team early in the planning stage. This allows the company's full expertise in designing efficient shapes, textures and finishes to be exploited, as well as their state-of-the-art knowledge on connection and erection methods.

Precast Components Meet All Needs
A wide range of precast concrete architectural and structural components can be used in commercial buildings. The key pieces used most often in these designs include:


ARCHITECTURAL PANELS:
Architectural precast wall panels are the solution of choice for the cladding on many office buildings, institutional facilities and mixed-use retail projects of all types. A key reason is that these panels offer beauty and affordable economy without sacrificing design freedom. That economy results from the low initial cost, the ability to enclose the structure quickly, the ability to continue construction through winter weather and the panel's long-term durability. In some cases, further economies can be achieved by designing load-bearing precast walls or using insulated wall panels to improve energy efficiency. These budget, scheduling and design benefits combine with precast's moldability to create dramatic and cost-effective looks for all types of commercial buildings.

GFRC PANELS AND DECORATIVE ELEMENTS:
Glass-fiber reinforced concrete (GFRC) can expand the options for attractive exteriors by using it for architectural panels and decorative accent elements, such as balusters, medallions and cornices. It consists of a Portland cement-based composite with alkali-resistant glass fibers randomly dispersed throughout. These fibers add flexural, tensile and impact strengths, producing a The use of GFRC can save costs in a variety of ways, including the use of lighter structural framing, faster erection using lighter cranes and creative rehabilitation of older, detailed buildings. GFRC also provides energy savings and will last the lifetime of the building, ensuring an attractive and consistent look through the years.

BEAMS AND COLUMNS:
A complete precast concrete structural system offers tremendous advantages and value for commercial buildings. The use of precast columns and beams makes an ideal framework for hanging precast panels, creating a design that offers fast construction, structural stability and enhanced fire resistance. A wide range of options is available for creating the perfect system to achieve the size and shape of commercial building required.

DOUBLE TEES:
These components provide excellent roof and flooring units, spanning considerable distances and providing quick erection to close in a structure faster. In some cases, they also can be used as wall panels on low-rise commercial buildings, creating distinctive designs that require little maintenance and offer fire resistance and durability as with architectural wall panels.

HOLLOW CORE PLANKS:
Precast hollow core flooring units provide long spans with cross-sections that reduce the height of the building, saving material cost, and their inorganic composition enhances fire protection. Local precasters can help determine which sizes, shapes and styles of components will best suit any individual commercial building project. Bringing the precaster into the planning early in the design process will ensure the precast components maximize their effectiveness in aesthetic appeal, functionality and cost effectiveness.


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 release agents, concrete casting supplies, Grifcote, Precast Concrete Form Release, Concrete Form Release Application, Form Release Application, Water Based Concrete Form Release, Precast Concrete Buildings

Could Mushroom Concrete Release Agent Make Precast Self Repairing?

Posted by Hill and Griffith Company on Sep 7, 2017 12:25:14 PM

Sounds like a wild idea but recent research by MIT indicates it may be a solution to keeping the mushroom pores alive until they are needed to repair micro cracks in concrete.

"Mushroom concrete release agent" is just our concept solution since MIT's research showed that the mushroom pores are killed by being mixed in the concrete. Here's the complete news release.

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How Mushrooms Could Repair Our Crumbling Infrastructure

A fungus that grows on concrete and promotes the growth of calcium carbonate could help repair roads and bridges, materials scientists say.

The U.S. has one of the most advanced economies in the world. And yet the concrete infrastructure that supports it—the roads, bridges, sidewalks, and so on—is slowly crumbling. This deterioration requires complex repairs, causes long delays, and in the most severe cases can lead to structural failure.

It’s also an increasingly expensive problem. Small cracks left unrepaired develop into bigger ones that expose metal reinforcement structures, and when these are damaged, repairs can be costly and complex. According to the American Society of Civil Engineers, this problem will cost the U.S. economy almost $4 trillion in lost business by 2025 if it’s not addressed.

Clearly, a better, cheaper way to repair concrete is desperately needed.

Enter Ning Zhang at Rutgers University in New Jersey and few pals, who say they have discovered a secret ingredient that could one day keep the nation moving by repairing crumbling concrete automatically. This new ingredient? Mushrooms.

First some background. Materials scientists have long hoped to find a secret sauce that helps concrete repair itself. One idea is to fill concrete with polymer fibers containing resin that leaks out to fills cracks.

That looked promising for a while, but it turns out that concrete and resin have different thermal expansion properties, among others, which can sometimes make cracks worse.

A better filler for cracks is calcium carbonate, because it bonds well with concrete and has similar structural properties. Various bacteria produce minerals of this kind but also release other by-products, including copious amounts of nitrogen products like ammonia. And this can damage roads and the environment.

So materials scientists need another option, and today Zhang and co say they’ve found it in the form of a fungus called Trichoderma reesei. It can germinate in a wide range of conditions, forming a fibrous fungus that promotes the formation of calcium carbonate.

Their idea is that fungal spores are added to the concrete when it is mixed and then lie dormant until the concrete cracks. Water flowing into the cracks causes the spores to germinate, filling the cracks with fungal fibers that trigger the formation of calcium carbonate—which eventually fills the void.

That’s the theory, but the crucial question is whether it would work in practice. So Zhang and co set out to find out.

The team poured concrete into petri dishes and allowed it to set. They then poured a growth medium onto each slab and added various kinds of fungi. They waited to see which of the fungi would grow in the highly alkaline conditions that concrete promotes.

The results were revealing. Of all the fungi tested, only Trichoderma reesei flourished even when the pH rose to 13. Zhang and co then studied its fibrous structure under a microscope and used x-ray diffraction to analyze the deposits it left behind. “The data strongly suggested that T. reesei hyphae can promote calcium carbonate precipitation,” they say.

Electron microscope images clearly show the mineralized structures the fibers leave behind.

Of course, none of that proves that Trichoderma reesei  spores can survive if added to concrete when it is mixed. Indeed, at first sight, that seems unlikely. The spores would have to sit in pores within the concrete.

Zhang and co measured the pores in the concrete they made and found that they were about one micrometer in diameter on average. But Trichoderma reesei spores are bigger—about four micrometers in diameter. That suggests they would be crushed as the concrete sets.

Zhang and co say the problem could be solved by adding air bubbles to the mix, but this needs to be investigated further.

That’s interesting work with a significant upside. If Trichoderma reesei turn out to be the magic mushroom that can repair the U.S.’s crumbling infrastructure, it will be a major boon. And it’s environmentally friendly, too—the fungus is benign as far as humans are concerned, and the process of forming calcium carbonate fixes carbon from the atmosphere. So it removes carbon dioxide, an important greenhouse gas.

Of course, there is much work ahead to determine whether the spores will survive in concrete. But the early results provide reason to study this in more detail.

Ref: arxiv.org/abs/1708.01337 : Screening of Fungi for Self-Healing of Concrete Cracks


Hill and Griffith Customer Service

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 Bulletins and Technical Papers for Concrete Casting Products

Tags: concrete release agents, concrete casting supplies, Grifcote, Precast Concrete Form Release, Concrete Form Release Application, Form Release Application, Water Based Concrete Form Release, Mushroom Concrete Release Agent

Review of CP/PCI Precast Concrete Guide to Infrastructure Projects

Posted by Hill and Griffith Company on Aug 29, 2017 3:09:11 PM

Canadian Precast/Prestressed Concrete Institute Technical Publications

"When we think of infrastructure we think not only of built infrastructure such as roads, but also bridges, drinking water, wastewater and storm water systems, and social infrastructure such as schools, hospitals and libraries.
 
It is well understood that the country’s infrastructure is aging. Much of the highway and water and sewer systems was built in the 1950s and 1960s, arriving at an important stage of their service lives. Depending on materials used, some have already failed or are in great need of rehabilitation or replacement. Traffic demand has grown tremendously without a corresponding increase in highway capacity, resulting in an increasingly high level of congestion. Large building construction projects simply compound traffic problems during lengthy construction periods. The traveling public demands high quality, longer-lasting highways, bridges and structures but they want any construction related activity completed quickly and economically. In order to address this problem, public and private authorities need to adopt a new philosophy of “Get in Get out – Stay out.”
 
Regulatory authorities are realizing that high quality precast concrete components, from certified precast facilities, can be used to minimize interference to the public during construction projects. The use of precast concrete components for many new or replacement bridge and/or water and sewer projects, have demonstrated significant reductions in construction time, reduced impacts on traffic flow and the environment, as well as long life performance.
 
About CPCI

CPCI (manufacturing) members number 41, with 58 plants throughout Canada with over 350,000sq. m of plant space available for producing the precast concrete you require for your project. The inherent benefits of precast prestressed concrete make it the best choice for many projects. Structural strength provides long clear spans. Fast production, delivery and erection saves time and money. The creative dimensions of shape, texture, colour and pattern produce attractive buildings. Durability means unsurpassed low maintenance and life-time cost effectiveness."

Precast Concrete Guide.jpg
Technical Publications page

 

Precast Concrete Guide "Infrastructure For Life" Table of Contents 

Structural & Architectural Precast Prestressed Concrete

Infrastructure Distress Precast Concrete

Corrosion Protection Precast Concrete

Concrete Materials & Design Standards

Precast Concrete – An Intelligent Material for Resilient Infrastructure Construction

Structural & Architectural Precast Concrete Systems

Parking Garage Precast Concrete.jpg
Parking Garages Precast Concrete

Stadium Precast Concrete.jpg
Stadiums & Arenas Precast Concrete

Railway Staion Precast Concrete.jpg
Railway, Light Rail and Transit Structures/Facilities Precast Concrete 

Pricavy Fence Precast Concrete.jpg
Privacy & Protection Precast Concrete

Utility Precast Concrete.jpg
Utilities Precast Concrete

Freight Handling/Storage Buildings/Industrial Buildings and Structures Precast Concrete

Docks & Wharfs Precast Concrete

Land Piles Precast Concrete

Prisons Precast Concrete

Water & Sewage Treatment Plants & Tanks Precast Concrete

Mining, Oil & Gas Sector Precast Concrete

Tunnel Liner Segments Precast Concrete

Special Applications & New Products Precast Concrete

Vehicle & Pedestrian Bridges Precast Concrete

CPCI Resources

CPCI Certification


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.

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 Bulletins and Technical Papers for Concrete Casting Products

Tags: concrete release agents, concrete casting supplies, Grifcote, Precast Concrete Form Release, Concrete Form Release Application, Form Release Application, Water Based Concrete Form Release

Review of Aberdeen Group's Report "How Clean Must Rebar Be?"

Posted by Hill and Griffith Company on Aug 24, 2017 3:54:05 PM

This report is a series of bond pull-out tests to assess the effect of contaminants on bond strength.

How clean must rebar be? The results may surprise most inspectors. Without such data, most inspectors take a conservative approach by requiring removal of such materials from rebar. But removing contaminants is time-consuming, and if construction contaminants aren’t detrimental to bond, their removal may not be necessary.

How-clean-does-rebar-need-to-be-1.jpg

A typical setup for a pull-out test included a tension/compression frame used to apply the load to the rebar. Slip of the rebar was measured with an electronic digital indicator.

Instead of pulling out of the concrete specimen, the rebar broke in eight of the nine sets of three tests. The tests were with with 100% contaminant coverage of the rebar for the worst possible case. Under these conditions, the contaminants didn’t adversely affect bond.

 

Read the full report here, "https://www.scribd.com/document/155461764/Rebar-Rust."

How-clean-does-rebar-need-to-be-2.jpgHow-clean-does-rebar-need-to-be-3.jpgHow-clean-does-rebar-need-to-be-4.jpg

 


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."
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Hill and Griffith Customer Service

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On-site casting defect investigations, product testing, machine start-ups and much more. Also, lab facilities are available to provide testing upon request.
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 Bulletins and Technical Papers for Concrete Casting Products

Tags: concrete release agents, concrete casting supplies, Grifcote, Precast Concrete Form Release, Concrete Form Release Application, Form Release Application, Water Based Concrete Form Release

Water Based Concrete Form Release

Posted by Hill and Griffith Company on Aug 17, 2017 2:15:01 PM

Grifcote® water based concrete form release agent product lines, are non-petroleum, readily and inherently biodegradable.

Readily biodegradable concrete form release agents that are VOC-compliant and NSF-certified. Grifcote concrete casting products include the most widely used concrete form release agents in the United States, Canada and in Puerto Rico, and are commonly used on precast, prestressed and poured-in-place applications among others.

 

Water-based-concrete-form-release-1.jpg

Grifcote FR-50-VOC is the workhorse for the concrete industry.

Water-based-concrete-form-release-2.jpg

Grifcote PR-SS-VOC 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.

 Water-based-concrete-form-release-3.jpg

Grifcote CC-150-VOC is widely used to season forms for optimal concrete release. Spraying form release agents on mixers and equipment reduces labor and cleanup at the end of the day eliminating concrete adhering to the equipment.

Water-based-concrete-form-release-4.jpg

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.

Water-based-concrete-form-release-5.jpg

Grifcote Bio Gold is a non-petroleum, non-staining concrete form release that is both VOC compliant and biodegradable.

Water-based-concrete-form-release-6.jpg

Grifcote 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.


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 release agents, concrete casting supplies, Grifcote, Precast Concrete Form Release, Concrete Form Release Application, Form Release Application, Water Based Concrete Form Release

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