Construction material based on activated fly ash
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United States of America Patent
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Dec 4, 2012
Grant Date -
Oct 27, 2011
app pub date -
Aug 17, 2007
filing date -
Aug 17, 2007
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Abstract
The disclosure concerns cost effective concrete formulations based on an alkali activated binder. The construction material of the concrete type, contains sand, fine aggregates, coarse aggregates, water and a binder comprising:
- from 55 to 80 wt. % of fly ash containing less than wt. 8% of CaO;from 15 to 40 wt. % of blast furnace slag;a chemical activator containing: from 0.8 to 4 wt. % of alkaline silicates; andfrom 1.5 to 9 wt. % of alkaline carbonates;wherein the chemical activator has an silica to alkali molar ratio from 0.1 to 0.55; and a booster comprising at least one strong base.
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