摘要
为探究透水混凝土在不同成型压力下的力学性能和孔隙结构,采用图像分析法对透水混凝土的孔隙个数、孔隙等效直径、孔隙率等孔隙特征进行分析处理.结果表明:随着成型压力的不断增大,透水混凝土呈现出孔隙率降低、抗压强度增大、孔隙个数增多、孔隙等效直径减小和孔隙分布更均匀的趋势;透水混凝土的透水系数与孔隙率呈正相关关系,透水系数的大小主要取决于透水混凝土的最小渗透率层.综合分析各因素得出,成型压力为 3 MPa的透水混凝土性能更优,此时透水混凝土孔隙分布均匀,孔隙率可达 21.23%,透水系数为 3.87 mm/s,抗压强度为22.96 MPa.
Abstract
In this study,the mechanical properties and pore structure of pervious concrete under different forming pressures were investigated using image analysis.Pore characteristics such as the number of pores,equivalent pore diameter,and porosity were analyzed.The results show that as forming pressure increases,the porosity of pervious concrete decreases,compressive strength increases,the number of pores increases,equivalent pore diameter decreases,and pore distribution becomes more uniform.The permeability coefficient,primarily determined by the minimum permeability layer of the pervious concrete,is positively correlated with porosity.Comprehensive analysis shows that the pervious concrete formed under a pressure of 3 MPa exhibits optimal performance,with uniform pore distribution,a porosity of 21.23%,a permeability coefficient of 3.87 mm/s,and a compressive strength of 22.96 MPa.
基金项目
宁夏回族自治区重点研发项目(2022BDE93016)
宁夏回族自治区重点研发项目(2021BEG02014)
银川市科技计划(2022ZDGX17)
国家科技期刊平台
NSTL
万方数据