轻质漂珠对HPMC/水泥基复合多孔保温材料性能的影响  

Effects of Lightweight FACs on Properties of HPMC/Cement-Based Composite Porous Thermal Insulation Materials

作　　者：王建龙 马兵 安巧霞[1] 杜轶赟 肖涛 陈琨 WANG Jianlong;MA Bing;AN Qiaoxia;DU Yiyun;XIAO Tao;CHEN Kun(College of Water Conservancy and Architectural Engineering,Tarim University,Alar 843300,China;Xinjiang Tower Construction 359 Construction Co.,Ltd.,Aral 843300,China)

机构地区：[1]塔里木大学水利与建筑工程学院,阿拉尔843300 [2]新疆塔建三五九建工有限责任公司,阿拉尔843300

出　　处：《硅酸盐通报》2024年第5期1840-1849,共10页Bulletin of the Chinese Ceramic Society

基　　金：新疆生产建设兵团科技攻关项目(2019DB009);新疆塔建三五九建工有限责任公司横向项目(SWJ2022KT21)。

摘　　要：为获得性能良好的羟丙基甲基纤维素(HPMC)/水泥基复合多孔保温材料,研究了不同掺量漂珠(FACs)对HPMC/水泥基复合多孔保温材料力学性能、导热系数、干密度、吸水性的影响,同时运用SEM、XRD等方法以及图像分析软件对复合材料气孔孔结构特征进行表征。研究表明,随着FACs掺量增加,导热系数呈先降低后增加的趋势,抗压强度先增大后降低。当FACs掺量为9.0%(质量分数)时,复合材料的导热系数最小,为0.094 W/(m·K),28 d抗压强度为1.58 MPa,干密度为418.9 kg/m^(3);当FACs掺量为18.0%时,复合材料的抗压强度最优,28 d抗压强度为2.15 MPa,导热系数为0.101 W/(m·K),干密度为431.0 kg/m^(3);随着FACs掺量增大,复合材料小于300μm的气孔比例逐渐增大,平均孔径呈降低趋势。In order to obtain hydroxypropyl methyl cellulose(HPMC)/cement-based composite porous thermal insulation materials with good performance,the effects of different amounts of fly ash cenospheres(FACs)on the mechanical properties,thermal conductivity,dry density and water absorption of HPMC/cement-based composite porous thermal insulation materials were studied.At the same time,SEM,XRD and image analysis software were used to characterize the pore structure characteristics of composites.The results show that with the increase of FACs content,the thermal conductivity decreases first and then increases,and the compressive strength increases first and then decreases.When the FACs content is 9.0%(mass fraction),the thermal conductivity of composites is the smallest,which is 0.094 W/(m·K).Under this blending ratio,the 28 d compressive strength is 1.58 MPa,and the dry density is 418.9 kg/m^(3).When the FACs content is 18.0%,the compressive strength of composites is the best,the 28 d compressive strength is 2.15 MPa,the thermal conductivity is 0.101 W/(m·K),and the dry density is 431.0 kg/m^(3).With the increase of FACs content,the proportion of pores less than 300μm in composites increases gradually,and the average pore size shows a decreasing trend.

关 键 词：漂珠 泡沫混凝土 抗压强度 导热系数 吸水率 孔结构 

分 类 号：TU528[建筑科学—建筑技术科学]