Researchers Test Low-Carbon Cement
The cement is made from calcined clay and ground limestone that, when added in large amounts to concrete mixtures, creates a cement that is less porous and stronger than traditional cement. This could make the new material, called LC3 (Limestone Calcined Clay Cement), a greener alternative to Portland cement, the cheapest, most commonly used cement but also the most energy-intensive to produce and the most caustic.
The cement industry’s sustainability goals will drive growth in the greener fly ash cement market, causing it to double to $47 billion by 2018, according to a May analysis by Lux Research.
Cement accounts for 6 percent of human carbon emissions. Using fly ash is one of the simplest and most cost-effective ways to cut carbon emissions in cement-making.
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