膨胀剂不同掺量对自密实混凝土力学性质影响分析

Analysis of influence on mechanical properties of self-compacting concrete with different contents of expansive agent

针对混凝土收缩会对混凝土结构产生裂缝危害的问题,本文对膨胀剂不同掺量后的自密实混凝土进行了力学性能方面试验研究,包括抗压强度和收缩应变试验。结果表明,膨胀剂能够对自密实混凝土收缩起抑制作用,随着掺量的增加,抑制收缩的作用也加强。膨胀剂抑制混凝土收缩在一定程度上提高了自密实混凝土的抗压强度。

In view of the problem that shrinkage of concrete can cause cracks in concrete structures,the mechanical properties of self-compacting concrete with different contents of expansive agent were studied in this paper,including compressive strength and shrinkage strain test.The results show that the expansive agent can inhibit the shrinkage of self-compacting concrete,with the increase of the dosage,the inhibitory effect of shrinkage is also strengthened.The expansive agent can restrain the shrinkage of concrete and improve the compressive strength of self-compacting concrete partly.