| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a concrete composition containing coal ash in relatively large quantities, excellent in fluidity and having high compressive strength and superior resistance to neutralization. SOLUTION: The concrete composition uses eco-cement comprising a hydraulic composition consisting essentially of gypsum and a calcined body obtained from ash of municipal garbage and/or ash of sewage sludge as raw material and containing calcium silicate and 10-40 wt.% one or more selected from calcium chloroaluminate, calcium fluoroaluminate and calcium aluminate and also uses coal ash as part of an aggregate.</p> |
