小麦堆孔隙率测定方法及影响因素研究

Research on Determination Method and Influencing Factors of Porosity of Wheat Pile

采用TSZ-6A型应变控制式三轴仪对小麦进行不同压力下的堆密度测试,通过自制孔隙率测定仪进行初始压力孔隙率测试,根据堆密度与孔隙率的关系计算不同品种、不同含水率、不同压力下样品孔隙率值。结果表明,小麦孔隙率随压力增大而减小,满足幂函数关系;小麦孔隙率随含水率增加而增大,满足二次函数关系;在一定尺寸范围内,品种对孔隙率无明显影响。

TSZ-6A strain-controlled triaxial apparatus was used to determine bulk density of wheat under different pressures and initial pressure porosity was tested by self-made porosity mete,the porosity values of samples under different varieties,water content and pressure were calculated according to the relationship between bulk density and porosity.The results showed that the porosity of wheat decreased with the increase of pressurewhich satisfied the power function relationship;The porosity of wheat increased with the increase of water content,which satisfied the quadratic function relationship;In a certain size range,varieties had no obvious effect on porosity.