摘要
本试验制备不同水灰比的混凝土渗透性试验用试件,然后对其进行渗透性试验,分别测定不同配合比,不同养护龄期和不同水压值下的氯离子侵入含量,旨在评价水压力下作用下,氯离子在混凝土中的传输机理。试验结果表明,氯离子侵入混凝土速率随着混凝土养护龄期的增加而降低;随着水灰比、水压值和水压力作用时间的增加而增加,尤其在较高水压力值下,氯离子侵入速率大大提高。在水压力作用下,水和氯离子侵入在混凝土内部的侵入深度具有较好的相关性,可以用水分侵入深度予以评价氯离子侵入深度。
The cylinder concrete specimens with different water cement ratio used in the permeability test, and then the permeability test was carried out. Additionally, the chloride content in concrete was determined after different mix proportion, curing time, application time and value of hydrostatic pressure, which aims to evaluate the transporting mechanism of chloride in concrete under the application of hy- drostatic pressure environment.The result shows the chloride penetration ratio decreases with the increase of curing time of concrete, and it increases with the increase of water cement ratio, application time and value of hydrostatic pressure.Especially for the concrete under a higher hydrostatic pressure, the chloride penetration ratio increases significantly. There exists a good correlation between the water and chloride penetration depth, which can be used to evaluate the chloride penetration depth into concrete through the water penetration depth.
出处
《混凝土》
CAS
北大核心
2016年第5期41-44,共4页
Concrete
基金
国家重点基础研究发展项目973计划(2009CB623203)
关键词
水压力
渗透性
氯离子侵蚀
耐久性
hydrostatic pressure
permeability
chloride penetration
durability
