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fly ash as a substitute of cement

Jul 01, 2008 After washing process, the chlorine content reduced to 1.28%, while the washed ash was similar to Class C coal fly ash in chemical composition and could be added into cement mortars as substitute. During the washing process, little heavy metals leached to the water with a pH value of 8.8 0.3 while the soluble salts (chloride and sulfate of Na ...

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