钢渣-石粉混凝土工作性和水泥胶砂力学性能实验研究

An Experimental Study on Steel Slag-stone Powder Concrete Workability and Cement Mortar Mechanical Properties

利用钢渣微膨胀补偿石粉干缩的思想,复掺钢渣-石粉取代部分水泥进行混凝土工作性和水泥胶砂强度实验。实验结果分析表明:复掺钢渣-石粉增大了混凝土拌合物的坍落度,但混凝土拌合物的黏聚性和保水性会随着石粉掺量增大而变差;因钢渣具有活性,参与后期二次水化反应,3、28d胶砂强度随着钢渣掺量(25%以内)增加而基本保持不变,而7d的随着钢渣掺量增加而减少;石粉不具有活性,3、7、28d胶砂强度随着石粉掺量增加整体呈现下降趋势;复掺钢渣、石粉的3、7、28d胶砂强度随着复掺掺量增加,整体呈现下降趋势,且随着石粉掺量增加,强度下降趋势明显。

Referencing the ideological of slag expansion compensating micro powder shrinkage, test the concrete workability and mortar strength mixed with steel slag-powder to replace part of the cement. Steel slag-stone powder increases the slump of concrete mixture,but concrete mixture cohesiveness and water retention will deteriorate with increasing stone powder content; The steel slag participates post-secondary hydration reaction because of its active properties, and 3, 28 d mortar strength substantially unchanged with steel slag content（less than 25%） increased, but 7 d mortar strength decreases with the steel slag content increasing; 3, 7, 28 d mortar strength show a downward trend with stone powder dosage increase because it does not have an active;3, 7, 28 d mortar strength show overall downward trend with complex mixed content increases,and the strength decreased significantly with the stone powder content increases.