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High-performance cement to provide competitive alternative

Nov, 16 2009

(ConstructionContractor.com) -- Scientists use post-industrial waste and naturally occurring materials to produce Geo-Green Crete low-carbon emission cement.

US Scientists at Green World Crete, a Florida headquartered green materials technology company, have invented a low-carbon emission cementitious product, Geo-Green Crete. This product promises to provide a high-performance and cost-effective green alternative to ordinary Portland cement (OPC).

Geo-Green Crete, which is a zero-Portland-based cement, is formulated using abundantly available post-industrial waste and naturally occurring aluminoscilicate materials. It has at its production core an environmentally friendly process for its manufacturing.

Elaine Duval, director of communications for Green World Crete, pointed out that “Over the millennia, concrete prepared by the ancient Egyptians and Romans – using lime, pozzolona and aggregates – is still in existence, giving proof of its durability. The Roman cement and the small artifacts they produced were made using knowledge of geopolymer techniques. The Geo-Green Crete product is very similar to these ancient cementitious materials.”

Portland cement has been the mainstay of all cementitious construction since its invention in the 1800s. However, from the early days of its discovery, Portland cement has had environmentally detrimental problems associated with its chemistry. The Portland cement manufacturing process, which involves the application of intense heat to limestone in large kilns, leads to the release of toxic levels of CO2, as well as other noxious chemicals and heavy metals into the atmosphere.

The Green World Crete scientists have focused their attention on developing a non-limestone based cement which does not require the use of fossil fuel to heat large kilns. Instead, the Geo-Green Crete process combines post-industrial waste and naturally occurring alluminosilicate materials with a binding agent at ambient temperature, in order to produce a long lasting eco-friendly cementitious material. The production of the Geo-Green Crete product results in a near zero carbon dioxide emission manufacturing process.

The Green World Crete is seeking business relationships for the establishment of new cement plants worldwide. Geo-Green Crete has been tested by independent laboratories in the US as well as in other countries. It meets ASTM (American Society for Testing and Materials) standards for compressive strengths that are suitable for use in non-structural and structural constructions such as sidewalks, driveways, roads, bridges, dams, ports, marinas, and commercial and residential building constructions.





SOURCE:  www.constructioncontractor.com.au