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Apr 01 2018· In regards to the result of leaching test for coal bottom ash coarse aggregate and porous concrete produced with these coarse aggregates it was satisfied with the environment criteria As the mixing rate of coal bottom ash increased influence of void ratio and permeability coefficient was very little but compressive and flexural strength

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May 01 2018· Reducing cement content in concrete mixtures research brief DOT National Transportation Integrated Search Concrete mixtures contain crushed rock or gravel and sand bound together by Portland cement in combination with supplemental cementitious materials SCMs which harden through a chemical reaction with water Portland cement is the most costly

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