静水压力下混凝土中氯离子传输特性试验研究

Experiment and Study on Transmission Characters of Chloride in Concrete Under Hydrostatic Pressure

氯离子是造成混凝土中钢筋锈蚀的主要原因,混凝土过早腐蚀耐久性降低,使混凝土结构达不到服役寿命。通过长期渗透性试验,定量地研究氯离子在不同静水压力、不同配合比、不同压力作用时间下的氯离子传输特点。结果表明,在静水压力作用下,氯离子的渗透深度和含量随着静水压力及其作用时间的增加而增加。内掺一定量的粉煤灰可以有效地降低混凝土中氯离子的侵入。

Chloride is the main reason for corrosion of steel bar in concrete, which reduce the durability of concrete structure and the concrete can＇t reach it＇s service life . The transmission characters of chloride under different hydrostatic,different mix proportion and different action time of the hydrostatic pressure are studied. The result shows that chloride content in concrete increases with the hydrostatic pressure and action time, and the concrete with flyash could lower the chloride content in concrete.