摘要
为解决严寒地区混凝土工程普遍出现的冻害现象,提高混凝土的抗冻性能,对双掺聚丙烯晴纤维和偏高岭土混凝土进行了200次冻融循环试验,测得其冻融前后试件的质量损失率与相对动弹性模量。结果表明,双掺聚丙烯晴纤维和偏高岭土可较大幅度提高混凝土的抗冻性能;随着偏高岭土掺量增加,混凝土质量损失率和相对动弹性模量都得到较大改善;随着聚丙烯晴纤维掺量的增加,混凝土质量损失率得到改善,相对动弹性模量逐渐降低。
In order to resolve the problem of frostbite and improve the concrete freezing-thaw durability in the chilly area, 200 freezing-thaw cycles of polyacrylonitrile fiber and metakaolin concrete are carried out, and the mass loss rate and relative dynamic modulus are measured. The experimental results show that the polyacrylonitrile fiber and metakaolin can obviously improve the concrete freezing-thaw durability. When the content of metakaolin increasing, the mass loss rate and relative dynamic modulus of concrete is increased. When the content of polyacrylonitrile fiber increasing, the mass loss rate of concrete is improved, but the relative dynamic modulus of concrete is reduced.
出处
《混凝土与水泥制品》
北大核心
2012年第10期44-47,共4页
China Concrete and Cement Products
基金
国家自然科学基金项目(50534040)
关键词
聚丙烯晴纤维
偏高岭土
冻融循环
质量损失率
相对动弹性模量
Polyacrylonitrile fiber
Metakaolin
Freezing-thaw cycles
Mass loss rate
Relative dynamic modulus
