| 摘要 |
<p>PURPOSE: To obtain a light-weight concrete composition excellent in development of strength by properly deciding a concrete mixing ratio and using not an aggregate lightened by expansion but a dense fly ash artificial coarse aggregate as the artificial coarse aggregate, capable of using a large amount of fly ash in terms of both sides of a concrete admixture and the coarse aggregate. CONSTITUTION: This concrete composition contains a cement (C), a fine aggregate (S), a coarse aggregate (G), fly ash (F) and water (W) and comprises 250-350kg/m<3> unit cement amount and 150-300kg/m<3> unit fly ash amount. Fly ash artificial coarse aggregate having 1.8-2.2 absolute dry specific gravity is used as the coarse aggregate (C).</p> |
