Many of concrete products mainly are mixed with breeze, some of them are mixed with fly ash also, which make concrete elements ninth complex and require higher demands for ratio design of concrete mixture.

• 摘要目前的商品混凝土多以掺加矿粉为主，有的还掺加粉煤达，致使混凝土成分复杂，因而对混凝土配合比设计提出了更高的要求。