The heat aging properties of rigid PVC are studied by means of mechanical properties test, SEM and FT-IR.
采用力学性能测试、扫描电镜、红外光谱（FT-IR）等方法研究了硬质聚氯乙烯的热老化性能。
Abrasion and mechanical properties test of concrete have shown that the degree of abrasion dependent on initial abrasion ratio, flexural strength and limit strain.
从混凝土磨蚀和力学性能试验得知，水工混凝土的磨蚀程度依赖于混凝土的初始磨损率，抗拉强度和极限拉伸变形值。
Systematic physio-mechanical properties test and analysis, especially analysis of relationship between expansion rate, dry density, water content, and overlying pressure, are carried out.
本项工作系统地进行了膨胀土的物理-力学性质试验及分析，尤其是膨胀率与干容重和含水量及外覆压力关系分析。
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