Influence Of Two-way Load On Chloride Permeability Of High Performance Concrete

This thesis presents an experimental study chloride permeability of high performance concrete under two-way load with different age period and different water to binder ratio. Under different age period (28d,56d,84d), the electric flux of high-performance concrete, with two kinds of mineral admixture at W/B ratio of 0.42, is measures by ASTM C1202. Under different water to binder ratio, the electric flux of high-performance concrete, with two kinds of mineral admixture at W/B ratio of 0.42,0.40 and 0.38, is measures by the same method at 28d age period. The goals of this thesis are to study the influence of two-way load on chloride permeability of high performance concrete.The experimental results indicate that:(1) The electric flux of high-performance concrete with different one-way load shows a quadratic function relationship. When the load grade is lower than 0.3, the influence of the electric flux by lode is not obvious, and when the load grade increases to 0.3 above, the electric flux increased significantly. (2) Under the same lateral load, with the increase of the vertical load grade, the electric flux tends to decrease firstly and then increase, showing a quadratic function relationship too. When the load grade reaches about 40%, the value is minimum. (3)When the load grade is same, the electric flux of high-performance concrete with different age period shows a logarithm function relations. (4) The electric flux is different with different strength grade of concrete, high-strength grade of concrete with a higher resistance to chloride ion erosion.