一种基于现代夯土材料黏聚力的孔隙率测算方法

A Method for Calculating Porosity Based on the Cohesion of Modern Rammed Earth

孔隙率是影响现代夯土材料热工性能的重要参数,但目前常用排水置换法测得孔隙率结果误差较大,而压汞法不能高效地测得材料孔隙率,不利于现代夯土材料热工性能的量化评估。根据固体间分子吸引理论,构建了一种基于现代夯土材料黏聚力的孔隙率测算方法,并结合试验进行了验证,结果表明现代夯土材料的黏聚力与孔隙率之间存在对数函数关系。通过公式,得到计算孔隙率平均误差为7.06%,验证了计算结果的合理性。

Porosity is an important parameter that affects the thermal performance of modern rammed earth materials.However,the commonly used drainage displacement method is of a large error in measuring porosity,while the mercury intrusion method cannot efficiently measure material porosity,which is not conducive to the quantitative evaluation of the thermal performance of modern rammed earth materials.Based on the theory of molecular attractive forces between solids,a porosity calculation method based on the cohesive force of modern rammed earth materials was constructed,and verified through experiments.The results show that there is a logarithmic function relationship between the cohesive force and porosity of modern rammed earth materials.Through the formula,the average error in calculating porosity is 7.06%,which verifies the rationality of the calculation results.