激光粒度分布仪在土工试验颗粒分析中控制参数的研究

Control parameters of laser diffraction grain size analyzer in particle size analysis of geotechnical experiments

激光粒度分布仪在土工试验领域应用目前尚无标准规范可依据。文章以天津港地区的土样为研究对象,通过对试验过程中的遮光率、超声波分散时间、分散剂浓度、离心泵循环转速等控制参数进行比对试验。确定了该方法在土工试验中的适宜性,同时建议了采用该方法进行颗粒分析试验合适的控制参数。

As a new experiment method, there is no standard or specifications for the laser particle size analyzer in thegeotechnical experiments. Taking the soil samples in Tianjin as the research subjects, we carried out a series comparisonexperiments to investigate the influence of the controlling parameters including the light shading percentage, the ultrasonicvibration time, the dispersant and the centrifugal pump speed. The results show that it is feasible to use the laser particle sizeanalyzer in the geotechnical experiments and some appropriate controlling parameters are suggested during the particle sizeanalysis experiments.