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进行了掺钢渣粉活性粉末混凝土配合比的正交设计试验,研究了钢纤维掺量与养护条件对掺钢渣RPC强度和体积变形的影响。结果表明:掺入总量为48%的钢渣粉、超细粉煤灰和硅灰,并以细河砂代替石英砂,同时掺入适量钢纤维,在0.18水胶比下制备了掺钢渣活性粉末混凝土(RPC200)。经90℃热水养护72h后,其抗压和抗折强度分别达152MPa和27.9MPa;钢纤维或热养护均有利于提高掺钢渣RPC的强度,且掺入钢纤维还能有效降低掺钢渣RPC的收缩率。
Orthogonal design experiments were carried out to study the mixing ratio of reactive powder concrete with steel slag and the influence of steel fiber content and curing conditions on RPC strength and volume deformation of steel slag. The results show that steel slag, ultra-fine fly ash and silica fume with a total amount of 48% are mixed with fine sand instead of quartz sand, Powder concrete (RPC200). The compressive strength and flexural strength were 152MPa and 27.9MPa respectively after hot water curing at 90 ℃ for 72h. Steel fiber or thermal curing all could improve the strength of RPC, and the incorporation of steel fiber could effectively reduce the content of steel slag RPC Shrinkage rate.