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。
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.
作者
陈登
宋旭艳
何智海
Chen Deng;Song Xuyan;He Zhihai(College of Civil Engineering,Suzhou University of Science and Technology,Suzhou,Jiangsu 215011;Research Center of Water Engineering Safety and Disaster Prevention of Ministry of Water Resources,Changjiang River Scientific Research Institute,Wuhan,Hubei 430010;College of Civil Engineering,Shaoxing University,Shaoxing,Zhejiang 312000)
出处
《非金属矿》
CAS
CSCD
北大核心
2020年第5期31-33,共3页
Non-Metallic Mines
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)。
关键词
粉煤灰
微界面
弹性恢复率
弹性模量
硬度
fly ash
micro-interface
elastic recovery rate
modulus
hardness
