纤维增强泡沫地聚物的孔隙结构与导热系数的关系研究  

Pore structure of the fibre-reinforced foam geopolymer and its relation to thermal conductivity

作　　者：闫东明 王苏锡[2] 陈士堃 刘毅[3] YAN Dongming;WANG Suxi;CHEN Shikun;LIU Yi(Huanjiang Laboratory,Shaoxing 311800,China;College of Civil Engineering and Architecture,Zhejiang University,Hangzhou 310058,China;School of Materials Science and Engineering,Zhejiang University,Hangzhou 310058,China)

机构地区：[1]浣江实验室,浙江绍兴311800 [2]浙江大学建筑工程学院,浙江杭州310058 [3]浙江大学材料科学与工程学院,浙江杭州310058

出　　处：《新型建筑材料》2025年第4期1-6,47,共7页New Building Materials

摘　　要：分析了纤维增强泡沫地聚物的孔隙结构及其与导热系数的关系,结合干密度、抗压强度、导热系数及MIP、XCT测试进行研究。结果表明,纤维掺量为0~0.500%时,各试件在凝胶孔和毛细孔范围内的特征孔径相近,掺入纤维显著增加毛细孔比例。大孔孔隙率随纤维掺量先减小后增大,纤维掺量为0、0.250%、0.500%试样的大孔孔隙率分别为56.89%、50.58%、60.25%。掺入纤维后小体积孔隙减少,大体积孔隙增加。导热系数随纤维掺量增加先增大后减小,纤维掺量为0.250%时导热系数最大,为0.211 W/(m·K),纤维掺量为0试样的导热系数最小,为0.125 W/(m·K)。The pore structure of fibre-reinforced foam geopolymer and its relationship with thermal conductivity were analysed and studied in conjunction with dry density,compressive strength,thermal conductivity and MIP and XCT tests.The results showed that the characteristic pore sizes of each specimen in the range of gel pores and capillary pores were similar when the fibre doping was 0~0.500%,and the introduction of fibres significantly increased the proportion of capillary pores.The macropore porosity decreased and then increased with fibre doping,and the macropore porosity of the un-doped fibre,fibre-doped 0.25%,and fibredoped 0.500%specimens were 56.89%,50.58%,and 60.25%,respectively.After fibre doping the small volume porosity decreases and the large volume porosity increases.The thermal conductivity increases and then decreases with fibre doping,and the highest thermal conductivity is 0.211 W/(m·K) at 0.250%fibre doping,and the lowest is 0.125 W/(m·K) in un-doped fibre specimens.

关 键 词：纤维 泡沫地聚物 孔隙结构 导热系数 

分 类 号：TU528[建筑科学—建筑技术科学]