冻融疲劳作用下高强混凝土劣化特征点的分析

为了提供一定的高强混凝土抗冻性定量化设计评估标准，本文定义了初劣点与陡劣点，并且为了确定这些点分别提出了P值检验法、拟合曲率法；同时展开了高强混凝土的冻融试验；在试验的基础上，分析了高强混凝土的初劣点与陡劣点以及它们的规律。结果表明通过初劣点、陡劣点、最大曲率三指标能够比较全面地反映高强混凝土的抗冻性能；高强混凝土的初劣点值与陡劣点值呈线性关系。

Analysis of the Characteristic Degradation Points for High Strength Concrete Subjected to Freeze-Thaw Cycles

In order to offer certain standards for quantitative design about frost resistance of the high strength concrete, the initial degenerate point and the sharp degenerate point were defined in this paper, and P value test method and regression curvature method were provided to determine these points respectively. Furthermore, based on freeze thaw experiments for the high strength concrete, attempts are made to analyze the initial degenerate point and the sharp degenerate point as well as their regularities. It is concluded that frost resistance of the high strength concrete can be reflected roundly through the three parameters, i.e. the initial degenerate point, the sharp degenerate point and the maximum curvature, and the relationship between initial degenerate point and sharp degenerate point is linear.