弯曲应力对混凝土碳化影响的室内试验研究

Experimental study on the effect of bending stress on concrete carbonation

通过快速碳化试验,研究了不同应力水平对混凝土碳化性能的影响,并探讨了角区与其两侧碳化深度之间的关系。研究结果表面:(1)实际中的角区碳化深度比通过两侧碳化深度几何叠加得到的碳化深度要大。(2)弯压应力对混凝土碳化起抑制作用,弯拉应力则起促进作用。(3)考虑弯曲应力影响的碳化深度预测模型的计算结果与试验结果比较接近,误差在10%左右。

The influence of different stress levels on the carbonization performance of concrete was studied through rapid carbonization tests,and the relationship between the angle zone and the carbonization depth on both sides was discussed.Results show that(1)The actual angle carbonization depth is larger than that obtained by geometric superposition of carbonization depth on both sides.(2)Flexural compressive stress inhibits concrete carbonization,while flexural tensile stress promotes it.(3)The calculated results of the prediction model considering the influence of bending stress are close to the experimental results,and the error is about 10%.