网状聚丙烯纤维对混凝土早期开裂的影响

Influence of reticulate polypropylene fiber on cracking of concrete at early age

采用平板约束试件,研究了网状聚丙烯纤维对普通混凝土和高性能混凝土早期开裂的影响,研究表明:掺入网状聚丙烯纤维后,可以有效抑制混凝土的早期干缩裂缝,延迟初始开裂的时间,细化裂缝,且在该试验条件下,纤维对两种混凝土的阻裂效果相同。

Study was made on effect of reticulate polypropylene fiber on cracking of ordinary concrete and performance concrete at early age by using plate restrain model. The result indicated that the fiber mixed in the concrete can effectively restrain and retard the cracking tendency at early age, thin the crack. In the condition of test, the effect of restrain crack of the fiber is comparative for the two specimens.