锂渣、钢渣高性能混凝土强度的试验研究

Experiment on strength of high performance concrete added with lithium slag and steel slag

采用正交的试验方法,以混凝土强度3,7,28,90 d龄期的抗压强度和28 d龄期的劈裂抗拉强度作为评价指标。试验结果表明水胶比以0.27为最优,以28 d龄期为准,由试验确定的最佳锂渣和钢渣掺量分别为10%和20%,锂渣、钢渣高性能混凝土28d劈裂抗拉强度在一定程度上与其抗压强度呈现比例关系。在最优水胶比条件下,锂渣、钢渣高性能混凝土的28 d龄期及28 d龄期以后的抗压强度均高于常规混凝土和单掺锂渣混凝土,同时,7~28 d龄期的锂渣、钢渣混凝土强度增长幅度最大且最优。

The paper used orthogonal test method and took concrete compressive strength of 3 , 7 , 28 , 90 days and splitting tensile strength of 28 days as the evaluation index .The experiment results show that the optimal water cement ratio of concrete is 0.27.Taking the concrete compressive strenght of 28d as the standard , the mixing amount of lithium slag ash and steel slag determined by test are 10% and 20%. The splitting tensile strength of 28 days of HPC added with lithium slag and steel slag presents positive re-lation with compressive strength of that .Under optimal condition of water-cement ratio , the compressive strength of 28 days or after 28 days of HPC added with lithium slag and steel slag are higher than that of ordinary concrete and single doped lithium slag concrete .While the increase of strength of HPC added with lithium slag and steel slag in 7 to 28 days is the biggest and optimum .