表面状态对硬化水泥石显微硬度及统计分布的影响

发布时间：2018-04-14 05:13

本文选题：硬化水泥石 + 显微硬度　；参考：《硅酸盐学报》2017年02期

【摘要】：研究了硬化水泥石样品表面平整度和含水状态对其微观形貌、显微硬度及统计分布的影响。结果表明:硬化水泥石显微硬度数据呈明显的离散分布特征,提高样品表面平整度可在一定程度上降低显微硬度数据的离散性,但对硬化水泥石进行有限次的显微硬度测试时,不论抛光与否,数据均不符合正态分布,而更加符合3因数对数正态分布。采用3因数对数正态分布对相同原材料、配比、养护和制样方法制备的硬化水泥石显微硬度进行统计分析后发现,饱和面干硬化水泥石的显微硬度明显低于干燥状态的样品。因此,当测试水泥基材料的显微硬度时,必须要保持待测样品表面具有相同的平整度和水饱和程度,并应采用统计方法对数据进行比较和分析。
[Abstract]:The effects of surface smoothness and water state on the microstructure, microhardness and statistical distribution of hardened cement stone were studied.The results show that the microhardness data of hardened cement stone show obvious discrete distribution characteristics, and increasing the surface smoothness of the sample can reduce the dispersion of the microhardness data to some extent, but when the hardness of hardened cement stone is tested for a limited number of times,Whether polished or not, the data do not conform to the normal distribution, but more in accordance with the logarithmic normal distribution of factor 3.The microhardness of hardened cement stone prepared by the same raw material, ratio, curing and sample preparation was statistically analyzed by using 3 factor logarithmic normal distribution. It was found that the microhardness of dry hardened cement stone on saturated surface was obviously lower than that of dry cement stone.Therefore, when testing the microhardness of cement-based materials, it is necessary to maintain the same smoothness and water saturation on the surface of the samples to be tested, and the data should be compared and analyzed by statistical method.
【作者单位】：同济大学先进土木工程材料教育部重点实验室;云南省建筑科学研究院;云南省建筑结构与新材料企业重点实验室;重庆大学材料科学与工程学院;华盛顿州立大学土木与环境工程系;
【基金】：国家自然科学基金(51302191,51132010)
【分类号】：TU525

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