抗裂剂对低胶材自密实混凝土性能影响的试验研究

Experimental study on the effect of anti-cracking agent on the performance of self-compacting concrete of low amount cementitious materials

研究了抗裂剂对低胶材自密实混凝土工作性能、力学性能、干缩性能及耐久性能的影响,结果表明,抗裂剂的掺入对低胶材自密实混凝土的工作性能影响较小,但较未掺抗裂剂时,28 d劈拉强度与拉压比分别提高了9.8%、11.7%,28、60 d干缩率分别降低了52.6%、45.1%,相对渗透性系数则降低了69%,56 d氯离子扩散系数降低了33.1%。

The effects of anti-cracking agent on the working performance, strength performance, dry shrinkage performance and durability of self-compacting concrete with low adhesive material were studied. The results showed that the effect of anti-cracking agent on the working performance of self-compacting concrete with low adhesive material was small,but the 28 days splitting strength and tension-compression ratio increased by 9.8% and 11.7%, respectively. At 28 and 60 days,the shrinkage rate was reduced by 52.6% and 45.1%,the relative permeability coefficient was reduced by 69%,and the chloride diffusion coefficient at 56 days was reduced by 33.1%.