文献类型：期刊文献

中文题名：粉煤灰与水泥浆体微界面的力学性能研究

英文题名：Study on Mechanical Properties of Micro-Interface between Fly Ash and Cement Paste

作者：陈登[1,2];宋旭艳[1];何智海[3]

机构：[1]苏州科技大学土木工程学院,江苏苏州215011;[2]长江科学院水利部水工程安全与病害防治工程技术研究中心,湖北武汉430010;[3]绍兴文理学院土木工程学院,浙江绍兴312000

年份：2020

卷号：43

期号：5

起止页码：31

中文期刊名：非金属矿

外文期刊名：Non-Metallic Mines

收录：CSTPCD、、北大核心2017、CSCD2019_2020、北大核心、CSCD

基金：国家自然科学基金(51778003);长江科学院开放研究基金资助项目(CKWV2019757/KY);广西建筑新能源与节能重点实验室开放课题(19-J-22-1)。

语种：中文

中文关键词：粉煤灰;微界面;弹性恢复率;弹性模量;硬度

外文关键词：fly ash;micro-interface;elastic recovery rate;modulus;hardness

中文摘要：采用纳米压划痕技术对粉煤灰水泥浆体微界面的力学性能进行研究,同时采用激光共聚焦显微镜对微界面形貌进行分析。结果表明,养护3 d的粉煤灰水泥浆体微界面较为薄弱,养护90 d的粉煤灰水泥浆体微界面黏结良好。养护3 d和90 d粉煤灰水泥浆体的微界面力学性能均低于粉煤灰颗粒与水泥浆体,养护90 d粉煤灰水泥浆体的微界面弹性恢复率、弹性模量和硬度明显高于养护3 d粉煤灰水泥浆体的微界面,养护90 d微界面弹性恢复率、弹性模量和硬度分别为63.5%、50.2 GPa和3.5 GPa。

外文摘要：Mechanical properties of micro-interface between fly ash and cement paste were analyzed by nano-indentation and nano-scratch techniques.Meanwhile,the micro-interface morphology was characterized by laser scanning confocal microscopy(LSCM).The results show that the micro-interface microstructure of fly ash cement paste is weak at 3 d,but the micro-interface is improved obviously at 90 d.Mechanical properties of the micro-interface of fly ash cement paste are lower than that of fly ash particles and cement paste.The elastic recovery rate,indentation modulus and hardness of the micro-interface of fly ash cement paste at 90 d are much higher than that of fly ash cement paste at 3 d,the values of the elastic recovery rate,indentation modulus and hardness are 63.5%,50.2 GPa and 3.5 GPa,respectively.