Glass Pozzolan Powders
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Glass powders are often used as pozzolans in concrete mixes. When added to concrete mix, glass pozzolan powders (very white, low alkali) react with the mix, forming a cement binder called calcium silicate hydrate (CSH). The end result is that between ten to thirty percent of the cement mix can be replaced by glass pozzolan powder. This is a good thing because the end result is that of a stronger concrete with less lime and therefore, less efflorescence issues. (The lime causes efflorescence, which is a whitish buildup on the surface of concrete. It obscures color and takes away from the aesthetics.)
Chemically, VCASâ„¢ pozzolans are comprised largely of oxides of silicon, aluminum and calcium with no deleterious impurities. The CaO-SiO2-Al2O3 proportions, the low alkali metal content, and the amorphous structure are ideal for a pozzolanic additive in hydraulic concrete. The low iron content makes them particularly well suited for applications using white cement, such as mortars, stuccos, terrazzo, artificial stone, and cast-in-place or precast concrete products
Glass Pozzolan Benefits on Fresh Concrete:Â
- Improved workabilityÂ
- Reduction in water requirementsÂ
- Ease of dispersabilityÂ
- Reduction in superplasticizerÂ
- Reduction in bleedingÂ
- Reduction in aggregate segregation
Glass Pozzolan Benefits on Hardened Concrete:
- Increased compressive strength
- Decreased permeability
- Increased durability Added-Value
- Mix-color neutrality and brightness
- Improved retention of mold detail
- Sustainability -
Sold in 50 lb bags, 48 basg/pallet. Availalble in a VCAS™ 140, VCAS™ 160, and an VCAS™ Ultra 200.
Technical Data Sheets available.
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