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Posted Thu Feb 23 2012: from EnvironmentalResearchWeb:
Drexel engineers develop cement with 97 percent smaller carbon dioxide and energy footprint
Drexel University engineers have found a way to improve upon ordinary Portland cement (OPC), the glue that's bonded much of the world's construction since the late 1800s. In research recently published in Cement and Concrete Composites the group served up a recipe for cement that is more energy efficient and cost effective to produce than masonry's most prevalent bonding compound. Drexel's "green" variety is a form of alkali-activated cement that utilizes an industrial byproduct, called slag, and a common mineral, limestone, and does not require heating to produce. According to Dr. Michel W. Barsoum, A.W. Grosvenor professor in Drexel's Department of Materials Science and Engineering, this alternative production method and the ubiquity of the mix ingredients, lessens the cost of materials for Drexel's cement by about 40 percent versus Portland cement and reduces energy consumption and carbon dioxide production by 97 percent.
[Read more stories about: efficiency increase, carbon emissions, technological innovation]

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