Below are a list of AltusGroup frequently asked questions. Contact one of our qualified representatives with additional inquiries.
- Why are CarbonCast products available only through AltusGroup precasters?
- Are CarbonCast products available outside North America?
- Where do I find accepted design standards for CarbonCast?
- How are CarbonCast fire ratings achieved?
- How does CarbonCast stand up to impact loads?
- What type of carbon fibers and resin are used in the C-GRID? What are their material properties?
- Can C-GRID® be used in cast-in-place concrete?
Why are CarbonCast products available only through AltusGroup precasters?
While very robust, like many other building materials, CarbonCast technology requires special knowledge and consideration in design, manufacture, handling and erection. To ensure that it is used properly and successfully, access to CarbonCast technology, know-how and training is limited to AltusGroup precasters.
Are CarbonCast products available outside North America?
Not yet. CarbonCast technology was developed in the US and is being deployed throughout North America first. After that, CarbonCast product may become available elsewhere in the Americas or in Europe, the Middle East, Africa and Asia.
Where do I find accepted design standards for CarbonCast?
Design standards, based on testing and conventional precast engineering standards, are available from AltusGroup precaster engineers.
How are CarbonCast fire ratings achieved?
The concrete used in CarbonCast products will be have the same as concrete used in conventional precast products. Where concrete of a certain depth is required to achieve a fire rating with conventional precast, the same depth of concrete will be required for CarbonCast products also. Where concrete thicknesses may not determine the fire rating, CarbonCast assembly fire ratings are determined by ASTM E-119 tests.
How does CarbonCast stand up to impact loads?
CarbonCast withstands impact loads very well because C-GRID prevents or controls cracking better than steel reinforcing. When CarbonCast products fail due to impact loads — such as punching shear, a clean hole is created in the area of the impact, while the surrounding areas remain intact.
What type of carbon fibers and resin are used in the C-GRID? What are their material properties?
C-GRID is made with continuous PAN (polyacrylonitrile) carbon fibers and epoxy resin — the same materials as carbon/epoxy golf clubs and aerospace parts. The carbon strands are chemically bonded together at the intersections with epoxy resin.
Can C-GRID® be used in cast-in-place concrete?
Yes, but it may cost more than the steel mesh it replaces and may involve changes in the way the concrete is placed. For more information about how to use C-GRID in cast-in-place concrete, including countertops, contact: Technical Marketing Manager or Commercial Development Director, Chomarat North America, (864) 260-3355 or chomaratna.com.