地聚物泡沫混凝土的性能和孔结构研究  

Properties and pore structure of geopolymer foam concrete

作　　者：吴少财 WU Shao-cai(School of Civil Engineering,Anhui Jianzhu University,Hefei 230601,China)

机构地区：[1]安徽建筑大学土木工程学院,安徽合肥230601

出　　处：《河南城建学院学报》2023年第6期22-29,共8页Journal of Henan University of Urban Construction

基　　金：安徽省高校自然科学研究重点项目(2022AH050261);安徽建筑大学引进人才及博士启动基金项目(2022QDZ23);安徽省住房城乡建设科学技术计划项目(2021-RK02)。

摘　　要：以粉煤灰和矿渣为胶凝材料,采用化学发泡法制备密度等级为300~1000 kg/m3的地聚物泡沫混凝土(GFC),对其抗压强度、导热系数和干燥收缩进行测试,并通过Image Pro Plus软件表征了不同密度等级下的孔结构参数。结果表明:(1)随着密度等级逐渐增加,抗压强度和导热系数逐渐升高,其中抗压强度与密度等级之间呈指数函数关系,导热系数与密度等级之间呈线性关系,干燥收缩随密度等级的增加而减小,与其呈二次函数关系。(2)GFC孔结构参数与密度等级之间同样具有强相关性,随着密度等级逐渐增加,其孔隙率逐步下降,平均孔径逐渐减小,孔隙形状逐渐接近于圆形。Using fly ash and slag as cementitious materials,geopolymer foam concrete(GFC)with a density grade of 300~1000 kg/m~3 was prepared by chemical foaming method.The compressive strength,thermal conductivity,and drying shrinkage were tested,and the pore structure parameters at different density grades were characterized using Image ProPlus software.The results show that:(1)With the increase of density grade,the compressive strength and thermal conductivity gradually increase.The relationship between compressive strength and density grade follows an exponential function,while the relationship between thermal conductivity and density grade is linear.The drying shrinkage decreases with the increase of density grade and follows a quadratic function.(2)The pore structure parameters of GFC also have a strong correlation with density grade.With the increase of density grade,the porosity decreases gradually,the average pore size decreases,and the pore shape gradually approaches circular.

关 键 词：地聚物泡沫混凝土 密度等级 抗压强度 导热系数 孔隙率 

分 类 号：TU528[建筑科学—建筑技术科学]