钢纤维再生混凝土抗压强度试验研究

选用0、40%、70%、100%4个再生骨料掺量及0、0.5%、1%3个钢纤维掺量,对C20、C25、C30、C35不同强度等级的钢纤维再生混凝土进行了48组配合比试验研究,分析了再生骨料和钢纤维掺量这两个配合比因素对钢纤维再生混凝土抗压强度的影响。试验结果表明:抗压强度随着再生骨料掺量的增加而减小,随着钢纤维的掺加增加而增大,当再生骨料掺量为40%、70%、100%时,其抗压强度分别降低约2%～9%、5%～11%、10%～29%;当钢纤维掺量为0.5%、1%时,其抗压强度分别增加约3%～10%、5%～13%。用再生骨料掺量为70%、钢纤维掺量为0.5%进行钢纤维再生混凝土配合比设计,可使其获得良好的和易性、满足强度及经济性要求。

Experiments of compressive strength mechanical properties of steel fiber recycled concrete

Selects 0,40%,70%,100% regeneration aggregate and 0,0.5%,1% steel textile fiber,to C20,C25,C30,C35 is the intensity rank’s steel textile fiber regeneration concretes has conducted 48 group of mixture ratio experimental study,has analyzed the regeneration aggregate and the steel textile fiber mixes the quantity these two mixture ratio factor to the steel textile fiber regeneration concretes compressive strength influence.The allocated proportion test result indicated:The compressive strength mixes the quantity along with the regeneration aggregate to increase reduces,spikes along with the steel textile fiber increases,when the regeneration aggregate mixes the quantity is 40%,70%,100%,its compressive strength reduces approximately 2%~9%,5%~11%,10~29% separately;When the steel textile fiber mixes the quantity is 0.5%,1%,its compressive strength increases approximately 3%~10%,5%~13% separately.Mixes the quantity with the regeneration aggregate is 70%,steel textile fiber mixes the quantity is 0.5% carries on the steel textile fiber regeneration proportioning of concrete design,may cause it to obtain the good workability,the satisfied intensity and the efficient request.