再生骨料透水混凝土性能的统计规律分析

Statistical Analysis of Performance of Recycled Aggregate Pervious Concrete

对再生骨料透水混凝土抗压强度、劈拉强度、孔隙率及透水系数的实测数据进行统计分析并检验,结果显示4个性能均基本符合正态分布规律。在此基础上,引入多维正态分布理论构成四维总体随机样本,通过求得其协方差矩阵并无偏估计样本总体的协方差,明确再生骨料透水混凝土各性能之间相关性。同时,利用χ^2统计量的Q-Q图检验法对四维总体随机样本进行正态性检验,得出由再生骨料透水混凝土各性能构成的随机向量服从四维正态分布。

Through the statistical analysis and test of the compressive strength,tensile strength,porosity and permeability coefficient of the recycled aggregate permeable concrete,the results showed that the four properties were basically in accordance with the normal distribution law. On this basis,the introduction of multi-dimensional the normal distribution theory constituted a four-dimensional population random sample. By finding the covariance matrix and estimating the covariance of the sample population,the correlation between the properties of the recycled aggregate permeable concrete was clarified.In addition,the Q-graph test method of χ^2 statistic was used to test the normality of the four-dimensional population random sample.It was considered that the random vector composed of the properties of the regenerated aggregate permeable concrete could well accept the four-dimensional normal distribution.