激光粒度仪与密度计法在黏土颗粒分析试验的研究与应用

Research and Application of Laser Particle Sizer and Densitometer Method in Clay Particle Analysis Test

通过对激光粒度仪法和密度计法两种试验方法的对比,分析了两种试验方法的优劣。激光粒度仪具有测试速度快、操作方便、重复性好、测试范围宽等优点,在道路材料检测领域的应用日益增多。选取试验路中两种具有代表性的黏性土样进行试验,取小于0.075 mm的土样进行激光粒度仪法和密度计法两种试验。对试验数据进行对比分析发现,激光粒度仪法所得粒径尺寸略大于密度计法;粒径较小的黏土颗粒更容易黏聚在一起;两种试验具有较高的相关性,通过回归分析建立了两种试验的回归方程。

By comparing the two test methods of laser particle sizer method and densitometer method, the advantages and disadvantages of the two test methods are analyzed. Laser particle sizer has the advantages of fast testing speed, convenient operation, good repeatability and wide testing range. It is increasingly used in the field of road material testing. Two representative cohesive soil samples in the test road are selected for the test, and the soil samples less than 0.075 mm are taken for the laser particle sizer method and densitometer method. By comparing and analyzing the experimental data, it is found that the particle size obtained by laser particle sizer method is slightly larger than that by densitometer method;Clay particles with smaller particle size are easier to stick together;The two tests have high correlation. The regression equations of the two tests are established by regression analysis.