Abstract:
An accelerated ice-natural pumice concrete reciprocating sliding wear test under various test conditions was designed. The accumulated wear of natural pumice concrete under various wear paths was tested. Life reliability modeling based on the Weibull distribution to investigate the service life of natural pumice concrete during the flowing period was performed. The least square estimation and the best linear unbiased estimation methods were respectively, used to estimate the various parameters. The experimental results demonstrate that the reliability curves based on the Weibull distribution effectively describes the accelerated failure process of natural pumice concrete under the influence of ice abrasion. The reliability curves of natural pumice concrete have a three-stage distribution that is monotonically decreasing, and its wear resistance degrades most noticeably in the accelerated damage stage. Among the two types of methods, the shape parameter values fluctuate most by the influence of the method, and at the early stage of reliability decline, the reliability life calculated by the least square estimation is smaller than that calculated by the best linear unbiased estimation method. The reliability life of na-tural pumice concrete under the reliability of 0.5 is selected as the life of natural pumice concrete under the action of ice wear, which will provide a theoretical reference for improving the wear resistance and safety of natural pumice concrete.