摘要
为深入研究石膏基自流平材料与外加剂的匹配适应性,系统分析了聚羧酸系减水剂和CH—C型缓凝剂掺入量对石膏基自流平砂浆的工作性能和力学强度的影响。结果表明,随着减水剂掺量增加,石膏基自流平砂浆的流动度先快速增加而后逐渐趋于稳定,抗折强度和抗压强度先升高后降低;随着缓凝剂掺量增加,石膏基自流平砂浆的初凝时间和终凝时间逐渐延长,抗折强度和抗压强度逐渐降低。当掺入0.2 wt%减水剂和0.1 wt%缓凝剂时,所制砂浆的流动度为196 mm,初凝时间为55 min,终凝时间为75 min,14 d抗折强度和抗压强度分别为9.2 MPa和25.3 MPa,达到了相关要求。
In order to further study the compatibility of gypsum-based self-leveling materials and admixtures,the influence of the blending amount of polycarboxylic acid-based water-reducing agent and CH-C type retarder on the working performance and mechanical strength of gypsum-based self-leveling mortar was systematically analyzed.The results showed that as the content of water reducing agent increased,the fluidity of gypsum-based self-leveling mortar first increased rapidly and then gradually stabilized.The flexural strength and compressive strength first increased and then decreased;as the content of retarder increased,the initial setting time and final setting time of gypsum-based self-leveling mortar gradually extended,and the flexural strength and compressive strength gradually reduced.When mixed with 0.2 wt%water reducing agent and 0.1 wt%retarder,the fluidity of the prepared mortar was 196 mm,the initial setting time was 55 min,the final setting time was 75 min,the 14 d flexural strength and compressive strength were 9.2 MPa and 25.3 MPa respectively,which satisfied the relevant requirements.
作者
胡成
陈平
向玮衡
段鹏选
周丽波
李青
韦家崭
HU Cheng;CHEN Ping;XIANG Weiheng;DUAN Pengxuan;ZHOU Libo;LI Qing;WEI Jiazhan(Guangxi Engineering and Technology Center for Utilization of Industrial Waste Residue in Building Materials,Guilin University of Technology,Guilin Guangxi 541004;College of Civil and Architectural Engineering,Guilin University of Technology,Guilin Guangxi 541004;Guangxi Key Laboratory of New Energy and Building Energy Saving,Guilin University of Technology,Guilin Guangxi 541004;Collaborative Innovation Center for Exploration of Hidden Nonferrous Metal Deposits and Development of New Materials in Guangxi,Guilin University of Technology,Guilin Guangxi 541004)
出处
《湖北理工学院学报》
2021年第6期44-49,共6页
Journal of Hubei Polytechnic University
基金
国家自然科学基金项目(项目编号:52062009)
广西高校中青年教师科研基础能力提升项目(项目编号:2021KY0262)
广西建筑新能源与节能重点实验室开放基金项目(项目编号:桂科能19-J-22-3)。
关键词
石膏基自流平砂浆
减水剂
缓凝剂
力学强度
gypsum based self-leveling mortar
water reducer
retarder
mechanical strength
作者简介
胡成,副研究员,博士,研究方向:固废资源化利用、低碳胶凝材料。Email:hucheng42@glut.edu.cn;通信作者:向玮衡,讲师,博士,研究方向:固废资源化利用、水泥基凝胶材料。Email:XWH891116@163.com。
