高密度聚乙烯土工膜拉伸性能各试验方法标准的差异

The Differences of Tensile Properties of HDPE Geomembranes using Different Test Methods

采用高密度聚乙烯土工膜五个常用的产品标准和方法,研究了试样尺寸和部分实验条件对土工膜拉伸性能的影响,并对实验结果进行了分析。研究结果表明:采用不同的方法标准,试样的断裂强度、屈服强度和屈服伸长率均没有明显的差异,断裂伸长率存在较小差异,但是不同方法断裂伸长率的数据分散性存在一定差异,其中采用AATMD6693-04方法,试样的断裂伸长率数据分散性更小。

The differences of sample sizes,gage length and some test conditions among different standards were studied for HDPE Geomembranes,and the results of the tests were discussed. The results showed that the tensile stresses at break,tensile stresses at yield and tensile elongations at yield had no significant difference of all standards. However, tensile elongations at break of all standards were slightly different. The dispersion of the tensile elongations at break of these standards was different, and the dispersion of ASTM D6693-04 was smaller than others.