不同体积掺量的SiO2气凝胶对砂浆性能的影响  

Effect on the performance of mortar using different volume content of SiO_2 aerogel

作　　者：王飞[1] 刘朝辉[1] 邓智平[2] 贾艺凡 丁逸栋 班国东 林锐[1] 

机构地区：[1]解放军后勤工程学院,化学与材料工程系,重庆401311 [2]解放军后勤工程学院,军事土木工程系,重庆401311

出　　处：《功能材料》2016年第4期64-69,共6页Journal of Functional Materials

基　　金：全军后勤科研计划资助项目(BY115C007);重庆市自然科学基金资助项目(CSTC2012gg-sfgc00002)

摘　　要：以低导热系数的SiO_2气凝胶颗粒为保温骨料,采用等体积替换法替换砂浆中的沙制备SiO_2气凝胶砂浆,主要研究当SiO_2气凝胶颗粒的替换比例分别在10%,20%,30%,40%,50%和60%时,对砂浆的密度、力学性能、吸水率以及导热系数等性能的影响,并在此基础上,通过添加纤维、引气剂和胶粉来对砂浆做改性,重点研究了各掺量对砂浆导热系数的影响,结果表明,当其掺量分别为0.2%,0.05%和1%时,导热系数达到最低为λ=0.0859 W/(m·K)。Using a low thermal conductivity of SiO_2 aerogel particles as insulation aggregate,the equal volume SiO_2 aerogel particles was adopted to replace sand in mortar to prepare thermal insulation mortar.The density,mechanical properties,water absorption,the thermal conductivity and other performance were studied when the SiO_2 aerogel particles replacement ratio was 10%,20%,30%,40%,50% and 60%.And on this basis,the thermal conductivity was focused on study when fiber,air-entraining agent and powder were added into the mortar.The results show that when the dosage was 0.2%,0.05%and 1%respectively,the thermal conductivity is the lowest(0.0859 W/(m·K)).

关 键 词：SIO2气凝胶 保温砂浆 导热系数 

分 类 号：TQ177.6[化学工程—硅酸盐工业]