单面冻融环境下CBC相对动弹性模量预测模型  

Prediction model of relative dynamic elastic modulus of cement-based composite in single side freeze-thaw environment

作　　者：何晓雁[1] 李毓佺 秦立达 张智鑫 HE Xiaoyan;LI Yuquan;QIN Lida;ZHANG Zhixin(School of Civil Engineering, School of Science, Inner Mongolia University of Technology,Hohhot 010051, China;College of Environmental Art and Civil Engineering, Heilongjiang Institute of Technology,Heilongjiang 158100, China)

机构地区：[1]内蒙古工业大学土木工程学院理学院,呼和浩特010051 [2]黑龙江工业学院环艺与建筑工程学院,黑龙江鸡西158100

出　　处：《功能材料》2022年第4期4111-4116,共6页Journal of Functional Materials

基　　金：国家自然科学基金项目(11862022);内蒙古自治区自然科学基金项目(2020LH05008);内蒙古自治区教育厅项目(NJZY19080);2020年度黑龙江省省属本科高校基本科研业务费项目(2020-KYYWF-0537)。

摘　　要：为了解水泥基复合材料(cement-based composite,CBC)在复杂冻融环境下耐久性能的劣化规律,采用单面冻融试验来评价水泥基材料在水和硫酸钠溶液中的耐久性,分别测试了其宏观性能(剥落量、相对动弹性模量)和微观孔结构参数(含气量、气泡间距系数、气泡比表面积、气泡平均弦长)。运用灰色关联理论,计算孔结构参数和相对动弹性模量的关联度以评价其对宏观性能的影响并建立了基于孔结构参数的相对动弹性模量预测模型。In order to understand the law of durability degradation of cement-based composite(CBC)in complex freezing-thawing environment,single side freezing-thawing test is used to evaluate the durability of cement-based composite in water and sodium sulfate solution.The macroscopic properties(spalling capacity,relative dynamic modulus of elasticity)and micropore structure parameters(gas content,bubble spacing coefficient,specific surface area and average chord length of bubbles)are measured.The grey correlation theory is used to calculate the correlation degree between the pore structure parameters and the relative dynamic elastic modulus for evaluating its influence on the macroscopic performance and a prediction model of the relative dynamic elastic modulus based on the pore structure parameters is established.

关 键 词：水泥基复合材料 单面冻融 孔结构参数 相对动弹性模量 灰色关联理论 

分 类 号：TU528[建筑科学—建筑技术科学]