论文部分内容阅读
以不同纤维掺量的聚丙烯纤维混凝土为研究对象,采用快速冻融法模拟自然盐冻,研究聚丙烯纤维混凝土的抗盐冻性能和氯离子在盐冻作用下的迁移。结果表明:混凝土的质量损失率和相对动弹性模量损失随纤维掺量的增大而减少,氯离子浓度在靠近试件表面处富集,掺量为0.1%的纤维混凝土能有效地延缓氯离子的迁移,大掺量纤维的掺入会降低混凝土内部的密实度,但在盐冻过程中可以延缓裂缝的发展。
With different fiber content of polypropylene fiber concrete as the research object, rapid freezing and thawing method was used to simulate natural salt frost, and the salt resistance and freezing resistance of polypropylene fiber reinforced concrete were studied. The results show that the mass loss rate and relative dynamic elastic modulus loss of concrete decreases with the increase of fiber content. The concentration of chloride ion is close to the surface of the specimen. The fiber concrete with the content of 0.1% Ion migration, the incorporation of a large amount of fiber will reduce the density of concrete inside, but in the process of salt can delay the development of cracks.