掺合料对混凝土抗裂性能的影响

The influence of admixtures on cracking-resistance of concrete

当前对混凝土的抗裂性能提出了很高的要求。本文结合九·五国家科技攻关课题《提高碾压混凝土抗裂能力的研究》 ,主要从掺合料对抗裂性能的影响进行试验研究分析。通过外掺掺合料 ,在保证混凝土的强度基本不变的情况下 ,降低混凝土的弹性模量 ,提高混凝土的极限拉伸值 ,从而提高混凝土的抗裂能力。

Today,the concrete demands higher cracking resistance.The paper is associated with the scientific payoffs The Research of The cracking Resistance of The Concrete, and we study the influence of the admixtures on the crack resistance.The result shows that we can decrease the elastic modulus and improve the ultimate extension by adding the admixtures as well as the strength changes little,and then improves the cracking resistance of the concrete.