There are some disadvantages in using the dry sieving method to determine the equivalent opening size(EOS) of geotextiles such as static electricity which will greatly effect the accuracy of the test result.
原有的水利部行业标准《土工合成材料测试规程》SL235-1999已制订多年,孔径试验(干筛法)的使用中发现一些问题,如粒料与织物反复摩擦产生的静电吸附现象,严重影响了试验所得结果的准确性,需要改进完善。
