油菜秸秆灰分混凝土保温性能试验  

Experimental research on thermal insulation properties of the rape straw ash concrete

作　　者：刘保华[1] 易恋[1,2] 曾哲 周雲[1] LIU Baohua;YI Lian;ZENG Zhe;ZHOU Yun(College of Engineering, Hunan Agricultural University, Chang sha, Hunan 410128, China;Hunan Province Modem Agricultural Equipment Engineering Technology Research Center, Changsha, Hunan 410128, China)

机构地区：[1]湖南农业大学工学院,湖南长沙410128 [2]湖南省现代农业装备工程技术研究中心,湖南长沙410128

出　　处：《湖南农业大学学报（自然科学版）》2018年第3期330-333,共4页Journal of Hunan Agricultural University(Natural Sciences)

基　　金：湖南省政府重大专项(湘府阅[2014]35号);湖南省教育厅青年基金项目(15B108)

摘　　要：选取砂率、水灰比及油菜秸秆灰分掺量为变量,在保障秸秆灰分混凝土设计强度为C20的条件下,采用稳态平板导热仪测试秸秆灰分混凝土试件的导热系数。结果表明:油菜秸秆灰分混凝土的导热系数与秸秆灰分掺量呈负相关关系,掺入油菜秸秆灰分后,导热系数比不掺秸秆灰分的混凝土试件的降低6.8%~21.0%,秸秆灰分的掺量越多,保温性能越好。当水灰比为0.52、秸秆灰分掺量为5%、砂率为30%时,油菜秸杆灰分混凝土抗压强度达22.8 MPa,并具有良好的保温隔热性能。The thermal conductivity of the straw ash concrete with the compressive strength of C20 was tested dependent on the sand ratio, the water cement ratio and the straw ash content by using steady state plate heat conduction tester. The results showed that there was a negative correlation between the thermal conductivity of ash concrete and the straw ash content. When the rape straw was added, the thermal conductivity of the straw ash concrete was decreased by about 6.8% ~ 21.0% compared with the concrete block without straw ash. The thermal insulation performance of the straw ash concrete was improved with an increase in the rape straw ash content. When the water cement ratio is 0.52, the straw ash content is 5%, and the sand ratio is 30%, the straw ash concrete possessed the best heat insulation performance with the compressive strength of 22.8 MPa.

关 键 词：油菜秸秆灰分 混凝土 导热系数 保温性能 

分 类 号：TU502.4[建筑科学—建筑技术科学]