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ASTM has established a new standard for glass pozzolans, ASTM C1866/C1866M-20, that covers two chemistries of glass, soda lime and E glass. Soda lime, which is used to make bottles and windows, is called Type GS. The other chemistry is E glass, made from glass fiber used for reinforcements, called […]
When I entered the concrete countertop industry after 25 years in the architectural precast industry, I had a hard time understanding some of the practices in use. There seemed to be a lot of misinformation surrounding the how and why of mix designs when it came to concrete countertops. Some […]
Portland cement consists primarily of calcium silicates. When mixed with water, a chemical reaction known as hydration creates calcium silicate hydrate (CSH). Needle-like crystals of CSH interlock to hold concrete together, almost like a glue.
Decorative concrete contractors are discovering the many benefits of metakaolin, an admixture that makes concrete brighter, denser and more workable.
