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介绍了孔结构对砖的强度、保温、干燥收缩以及抗渗等性能的影响,列举出了目前应用较为广泛的几种孔结构测量方法并指出了各自的局限性.基于毛细吸水动力学原理,推导出毛细孔单位面积吸水率W(t)与槡t之间的关系,得到了毛细吸水系数S与平均孔半径以及孔隙率之间的关系,进而得到平均孔半径以及孔隙率与毛细吸水系数S之间的函数关系式,借此提出吸水法测砖的平均孔半径的试验方法.通过对烧结页岩砖、蒸压灰砂砖和蒸压粉煤灰砖的吸水试验,结合得到的函数关系式,计算出了3种材料的平均孔半径,为研究砖的物理力学性能提供了建议的试验方法.
The effects of pore structure on the strength, thermal insulation, drying shrinkage and impermeability of the brick are introduced. Several methods for measuring pore structure which are widely used are listed and their respective limitations are pointed out.Based on the principle of capillary water absorption kinetics, The relationship between the capillary water absorption W (t) and 槡 t is deduced. The relationship between the capillary water absorption coefficient S and the average pore radius and the porosity is obtained, and the average pore radius, porosity and capillary water absorption coefficient S as a function of the relationship between the water absorption method to test the average pore diameter of the test method.By the sintered shale brick, autoclaved lime sand brick and autoclaved fly ash brick water absorption test, combined with the function Relationship, calculated the average pore radius of the three materials for the study of the physical and mechanical properties of the brick provide a suggested test method.