The build-up thickness of a mix containing TYTRO® RC 430. "It's important to have a mix that is viscous, cohesive, and sticky enough for high build-up thickness, which is highly desirable," said GCP scientist Ezgi Yurdakul.
The Eighth International Conference on Deep and High Stress Mining, in Perth, Australia this March, will aim to better understand significant geotechnical and logistical issues of deep and high-stress mining.
Host Australian Centre for Geomechanics has selected GCP Applied Technologies' paper, "Role of chemical admixtures in improving wet-mix shotcrete performance for ground support," as contribution to this more comprehensive understanding of the challenging construction environment.
In the study, GCP scientists tested performance of liquid admixtures against silica fume powder. They conducted field experiments during a major ground support operation where the project was susceptible to an alkali-silica reaction (ASR) risk. The applied admixture—a pozzolonic-based rheology control agent—had to reduce risk of ASR, increase early-age strength, enhance sprayability and pumpability of the shotcrete and meet required later-age strength, toughness and durability.
Results reflected that the customised mix design for the proposed system—25% fly ash and 0.8% rheology control agent admixture—more than met job requirements.
Sprayability vs. Pumpability
Key components of quality shotcrete are pumpability and sprayability, which are typically at odds with each other. Pumpability, which is a mix's stability and mobility under pressure, tends to rate better with high slump. High slump, however, does not bode well for a mix's adhesion (stickiness to the surface) and cohesion (stickiness to itself). In contrast to pumpability, good sprayability excels when the mix is highly viscous, a "sticky mix," with low slump.
To satisfy the conflicting sprayability/pumpability requirements in the shotcrete, GCP has designed TYTRO® RC 430, a rheology control agent, to draw a delicate balance between rheological characteristics. The TYTRO® RC 430 maintains the highest possible fluidity, while providing desired viscosity, cohesiveness and "stickiness."
Download the scientific paper to learn how GCP's rheology control can accelerate early strength for build-up, reduce rebound rate, increase pumpability and maintain high later-age strength of shotcrete…
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Vycor® enV-S™ weather barrier was applied to the Habitat for Humanity home prior to its transport to Palm Beach County. Since the membrane is self-adhered, Vycor was able to withstand winds up to 70 mph en route. Photo credit: David Porter
For more than two years, GCP Applied Technologies has donated their self-adhered weather resistive barrier, Vycor® enV-S™, to the Weitz Construction Academy in Loxahatchee, Florida. The collaboration to build homes for Habitat for Humanity of Palm Beach County.
Vycor® enV-S™ provides an advanced alternative to house wraps and is the latest in residential building science to create an air-tight, yet breathable home. It is a highly durable membrane that directly adheres to the sheathing, avoiding the tears and costly reworks commonly associated with traditional house wraps. The wall is protected from water damage and the job site looks neat, sealed and attractive even during construction.
"We have a great relationship with GCP," said David Porter, Weitz Construction Academy volunteer architect and project manager. "Not only have they donated a lot of product, GCP has sent a representative to the school to teach the students how to install their products."
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Vycor passes the hurricane test
"(GCP's) Vycor® enV-S™ weather resistive barrier is a standout product, even passing our highway wind test every time," Porter said. "Before installing siding on the module home, we transport the home from the school workshop to the Habitat job site. The truck drivers put Vycor® enV-S™ to the test by hitting the highway at 70mph during the trip. We call it our 'Category 1 hurricane test' and it has survived nicely without a hint of peeling away. Prior to discovering Vycor® enV-S™ and working with GCP, our use of standard building wraps ended up with most of it pulling away from the sheathing, like sails in the wind!"
"Our partnership with the Weitz Construction Academy has been a great experience and opportunity for GCP," said GCP Applied Technologies’ Marketing Director Sonya Santos. "The program provides weather-protected and affordable homes for hardworking families in Palm Beach County. Hundreds of students have benefited from the opportunity to learn important career skills, training the next generation of construction professionals. The academy’s unique mission is inspiring young students and teaching them the latest construction techniques in all trades, while giving back to the community."
More than 2,000 m2 of Preprufe® waterproofing membrane seals the Crossrail's Tottenham Court Road Station
When Crossrail designers required high-performance waterproofing for the many stops along the track, they consulted GCP Applied Technologies. And rightly so.
More than 60 years of product innovation backed by expert staff, whose combined years span more than three centuries of knowledge and expertise, has forged the GCP portfolio into an unstoppable force providing waterproofing protection against water, gas and corrosive soil damage for below ground structures.
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A powerful waterproofing portfolio
For decades, GCP—formerly Grace Construction Products—has introduced industry changing products and technologies.
Bituthene® is the first cold applied, self-adhesive waterproofing membrane. Preprufe®, with Advanced Bond Technology™, is the first pre-applied membrane to create an impermeable protective seal to concrete against water; Preprufe® Plus with Ziplap™ technology, a fast and easy-to-apply waterproofing membrane with adhesive twin laps to protect difficult details.
Liquid waterproofing solutions include Silcor® 900HA, a hand-applied seamless single layer solution that ensures continuous waterproofing integrity for decks. GCP developed Adprufe® to significantly reduce the permeability and drying shrinkage of concrete.
Products constituting GCP’s waterproofing portfolio are sealing nearly all of the Crossrail stations.
Contact the team for a free consultation…
Mike McGrath, Graniterock concrete division business manager in front of one of the company's ready-mix trucks
West Coast ready-mix concrete producer Graniterock will add Verifi® In-Transit Concrete Management system to its truck fleet, further improving its already exceptional customer service and efficiency.
"At Graniterock, we are focused on safety, customers and quality," Graniterock Concrete Division Business Manager Mike McGrath said. "Verifi’s in-transit concrete management is a tool that helps us improve our position in all three of these areas. It not only helps us strengthen our operations; it enhances quality, efficiency and transparency for our customers. Verifi is an innovative technology that brings major improvements to the construction materials industry—to both suppliers and their customers."
"By adding the Verifi system to the Graniterock truck fleet, we've enhanced our relationship providing in-transit concrete management capabilities," said Matt Nazarenko, Global Marketing Manager for Verifi. "We can now create value across all areas of their operation, leveraging the benefits of the Verifi system with our high-performance concrete admixtures and expert technical support in the Bay Area."
Verifi® In-Transit Concrete Management™ provides sophisticated, automated process monitoring and control during transit from the ready-mix plant to the jobsite. Verifi offers a new level of concrete quality control and helps increase product consistency from one truck to the next, reducing rejected loads, increasing jobsite efficiency and minimizing costly project delays.
For more than a century, Graniterock has been building highways, driveways and runways. Recipient of the Malcom Baldridge National Quality Award, Graniterock is a supplier of construction aggregates, ready-mix concrete, asphalt, building materials and a general engineering contractor. Using the highest quality materials, friendly experts and modern technology, Graniterock provides the materials needed for any construction job. Its corporate headquarters is based in Watsonville, California.
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GCP expert will present study on manufactured sand at Thai conference, centered on innovative concrete solutions for the future
More and more, GCP Applied Technologies' scientists and technical experts have observed the use of manufactured sand over natural sand, as a fine aggregate in ready-mixed concrete.
THE PRIMARY REASON: Environmental concerns have made what remains of available natural sand resources an economically unviable option for the concrete producer.
It's important to note, however, that crushed stone fines and quarry dust alternatives are more abundant, but lack quality. GCP has, therefore, published a paper entitled, "Issues with, and Admixture Solutions, for the Use of Manufactured Sand in Concrete," to study the introduction of GCP concrete admixtures into mixes to achieve a higher quality concrete with manufactured sand.
GCP tech expert Dr. Jiabiao Jiang will present the study at the Thai Concrete Association conference, in Bangkok, Feb. 15-17, 2017. The conference's theme is "Innovative Concrete for the Future of Construction Material."
An excerpt from the paper reads: "The key idea is to develop admixtures with enhanced water reduction capacity to compensate for the increase in water demand and rheology modification to improve the pumpability and finishability of concrete mixes with manufactured sand so that they work just as well as concrete with natural sand."
To read the entire study, you can download the paper below.
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Don't miss GCP Applied Technologies'
Ice & Water Shield® self-adhered roofing underlayment and latest residential building envelope innovation,
Vycor® enV-S™ self-adhered weather resistive barrier, on the renovation of the
This Old House® Arts & Crafts project airing two episodes, beginning Thursday, Jan. 5, 2017 (check local listings):
"Arts and Crafts from Top to Bottom" (part 9 of 16)
original air date 1/5/2017
"Underground Energy" (part 11 of 16)
original air date 1/19/2017
"We are proud to work with the This Old House crew on another unique home project," said Sonya Santos, Director of Marketing for GCP’s Residential Building Materials business. "It is one of our greatest honors to have our
Ice & Water Shield®, which has been trusted for nearly 40 years, used by such a highly trusted brand and team of respected home renovation experts."
This Old House® episodes feature the renovation of an Arts & Crafts home in Arlington, Massachusetts. Original
Ice & Water Shield®, was used on the roof of the Arlington home to protect it from extreme weather such as wind-driven rain and ice dams. The underlayment seals around the fasteners used to attach the shingles, which helps prevent water build up from leaking into the house.
Ice & Water Shield® also sticks to the roof deck so that water may not travel under the underlayment and enter the house via a vulnerable roof deck joint. The episode that includes
Ice & Water Shield® is titled “To Paint or Not to Paint, number 1507/3607 and airs on PBS beginning November 10, 2016.
"The This Old House crew also selected our advanced weather barrier,
Vycor® enV-S™, an advanced alternative to house wrap. This weather resistive barrier represents the latest in residential building science to create an air-tight, yet breathable home, and achieve the highest product performance available," Santos said.
The well-respected Oak Ridge National Lab tested and evaluated the annual savings potential of
Vycor® enV-S™ membrane compared to traditional house wrap.
Vycor® enV-S™ weather resistive barrier boasts an air leakage rate
seven times lower than the leading house wrap brand. The Oak Ridge Lab also found that using this new and advanced membrane can provide significant energy savings for homeowners in all regions of the United States.
The use of PVC-free closure sealants during the champagne maturation process began more than 20 years ago, with Darex®.
PVC-free closure sealants replace cork sealants for less organoleptic variability and constant gas exchange. This avoids the irregular exchange that can occur with the cork.
During champagne maturation, Daraform® PVC-free crown liners are applied to the temporary seal.
Darex® plays a key role in champagne maturation
After crown capping, champagne bottles embark on a long period of maturation on lees—residual sediment that settles in the wine bottle during maturation. Bottles are stored at a downward angle in a cellar kept at a constant temperature of 12°C (54°F).
The crowns are then removed during the disgorgement phase. This is a critical point in the life of champagne, that takes anywhere from many months to years of peaceful maturation on lees.
The purpose of disgorgement is to eliminate the deposit that has collected in the neck of the bottle, while maturing. During disgorgement, the bottleneck is plunged into a refrigerating solution at -27°C (-16°F). The sediment (in the form of a frozen plug) ejects under pressure when the bottle is opened, with minimum loss of wine and pressure.
Finally, the cork is forced into the neck of the bottle, covered with a protective metal capsule, then held in place with a ‘muselet,' or wire cage, to form an airtight seal.
From there, the champagne is ready to usher in a new year, celebrate a wedding or other momentus occasion, or christen a ship ready to berth into the mighty ocean. All of this was possible thanks, in part, to Darex®'s PVC-free closure sealant Daraform®.
Sistiaga® coatings provide application robustness even with older equipment
GCP Applied Technologies reinforces its ongoing commitment to the rigid packaging marketplace with the addition of the complete
SISTIAGA® can coatings portfolio of coatings for aluminum containers and collapsible tubes.
Robustness and Consistency
SISTIAGA® can coatings offer extreme robustness and application versatility. Whether applied in aluminum aerosol cans, bottle-cans or collapsible tubes,
SISTIAGA® can coatings ensure the best balance between chemical and mechanical resistance, as well as smooth and consistent application performance.
SISTIAGA® can coatings provide application consistency. Their formulation robustness can be put to the test in both state-of-the-art machines and older equipment, without sacrificing performance. This independence from equipment variables is one of
SISTIAGA® can coatings' greatest assets.
SISTIAGA® preserves container integrity
Internal coatings for aerosols and bottle-cans
Our solvent-based internal coatings function to preserve the integrity of aluminum containers by protecting the aluminum from corrosive impact. Internal coatings improve the shelf life of containers and remain neutral, from an organoleptic perspective.
Irrespective of resin technology, our internal coatings for aerosols and bottle-cans feature excellent sprayability and good film porosity.
SISTIAGA® internal coatings cover a full spectrum of applications, ranging from beer, carbonated soft drinks, energy drinks and water, to high pH health and beauty products.
Responding to the packaging needs of household and cosmetic products containing chemically aggressive solvents, our polyamide imide-based product line offers maximum resistance to chemical agents. They're suitable for use with DME propellants.
Basecoats for aerosols and bottle-cans
SISTIAGA® can coating products allow customers to take full advantage of aluminum containers for high-impact graphics and colors. Our highly decorative and versatile basecoats provide a fundamental foundation to support inks and varnishes.
Whether white or clear,
SISTIAGA® solvent-based basecoats show extreme latitude as primers for inks from different suppliers. All formulations have been carefully designed to achieve perfect balance between elasticity, mechanical strength and process resistance.
See our SISTIAGA® products up close at the
Aerosol & Dispensing Forum 2017, in Paris.
GCP Applied Technologies may appear brand new, but the construction materials and packaging solutions producer hails from decades of innovation.
Since the early 20th century, the GCP lineage has filed nearly 900 patents. And here's the first in concrete
Download the patent in PDF
Dewey & Almy applied for a patent in new
admixture technology, based on a Lignin derivative. The compound was an effective dispersion agent to produce
concrete with lower cost or better strength.
The major cost in producing
cement. And water is needed to mix with the
cement so that it becomes pliable, more plastic, making it easy to form, manipulate and to catalyze
cement hydration. The more water, the more workable the
cement becomes, as well as more hydrated.
The tradeoff, however, is that excess water weakens the
concrete. Yet, producers needed to add excess water to achieve the desired
cement workability, sacrificing strength or cost.
The Lignin derivate concrete
admixture solved for this. The water-reducing agent dispersed
cement particles efficiently to grant the desired workability, without having to add excess water.
Due to Dewey & Almy's innovative
admixture, we have a
concrete produced with workable
cement, that maintains strength or lowers cost of production.
Grace Construction & Packaging (the future GCP) would acquire Dewey & Almy in 1954.
The ease of applying
Silcor® 900HA liquid waterproofing will save you time, without sacrificing the integrity of the structure. It's fast-curing and foot-trafficable within 2 hours. The cold-applied formula requires no kettles, flames nor propane, and no additional protection against mechanical damage, in normal conditions.
The elastometric design of the
Silcor® accommodates movements and bridges concrete shrinkage cracks, for continuous waterproofing integrity. Easy detailing. No reinforcement needed. Virtually odorless.
Hand-applied, at wide temperature and humidity ranges, for maximum coverage per day.
Fast cure property speeds up construction cycle.
Reduced failure risks
Fully-bonded waterproofing reduces risks of leakage.