When alkali reacts with certain aggregates it causes ASR, an expansion phenomenon that forms an expansive gel that causes crack and durability issues. Since it takes exposure to water to keep the reaction going, ASR usually only occurs in weather-exposed environments. Concrete with glass pozzolans will be stronger and denser (less permeable). This means that water carrying salt and other deleterious chemicals can’t easily soak into the concrete.

Our Pozzolan is made from 100% recycled glass which is Amorphous Silica which is harmless to humans when used in industrial applications. Sand is Crystalline Silica which according to OSHA, is a hazardous material and can cause disease like silicosis if inhaled. Processed into a fine powder, glass pozzolan can replace up to 40% of portland cement in a mix, creating a stronger, denser, less permeable, and more durable concrete while making use of a readily available, inert waste material. Glass pozzolan can also improve concrete’s workability and reduce the amount of water and chemical admixtures required. The production of portland cement used in concrete is responsible for approximately 5% of total global CO2 emissions, so replacing some of the portland cement with glass pozzolan can significantly reduce concrete’s carbon footprint. As a bonus, glass pozzolans make use of a readily available regional waste material that is often landfilled instead of recycled, and it can be used in place of fly ash (which can contain toxic heavy metals) and ground granulated blast furnace slag, both of which are byproducts of carbon-intensive industries.

Pozzolan Glass reacts in concrete to convert the weaker phase Calcium Hydroxide to the stronger binding material Calcium Aluminum Silicate Hydrate that makes a stronger and more durable concrete. When cured, concretes with Glass Pozzolans will continue to build strength long after straight cement mixtures have reached their ultimate strength