自密实混凝土抗裂性能研究

The crack resistance of self-compaction concrete

对水胶比为0.43的自密实混凝土和普通泵送混凝土的早期开裂性能和干缩开裂性能进行了对比研究。研究结果显示,在同样水胶比情况下,在早期开裂和干缩开裂试验中,自密实混凝土的裂纹宽度均较普通泵送混凝土细,裂纹数量均较普通泵送混凝土多;从总体上评价,自密实混凝土的抗早期开裂和干缩开裂的性能均优于普通泵送混凝土。

The early stage crack and drying shrinkage crack of self-compaction concrete and pump concrete with water binder ratio is 0.43 are studied.The results show that the crack width of self-compaction concrete is smaller than pump concrete, and the crack number of self-compaction concrete is higher than pump concrete at the both early stage crack and drying shrinkage crack test.In general,the early stage crack and drying shrinkage crack resistance of self-compaction concrete is better than pump concrete.