纤维增强自密实活性粉末混凝土的配制试验研究

Experimental research on preparation of self-compacting RPC reinforced with fibers

测试了活性粉末混凝土的浆体流动性能以及28d抗压和抗折强度，分别研究了水胶比、矿物掺合料、钢纤维和聚羧酸高效减水剂对活性粉末混凝土的流动性能以及28d强度的影响。研究表明：当矿物掺合料掺入量较低，且钢纤维体积掺量超过1．5％，水胶比低于0．2时，同时聚羧酸高效减水剂掺入量需达到2％-2．5％之间，能够配制出流动度大于25cm，28d抗压强度和抗折强度分别超过120、20MPa的活性粉末混凝土。

Through the fluidity diameter test, compressive strength test and flexural strength test for 28 d.And to study the influences of water-binder ratio, mineral admixtures, steel fiber and polycarboxylate superplasticizer on fluidity diameter, 28d compressive and flexural strengths.The test results show that when with the low dosage of mineral admixtures, the volume dosage of steel fibers more than 1.5% and the water-binder ratio lower 0.2.The fluidity diameters are more than 25 cm.The compressive and flexural strengths are more than 120 MPa and 20 MPa resoectively with 2%-2.5% polycarboxylate superplasticizer in the slurry of reactive powder concrete.