细骨料和减水剂对石膏基自流平砂浆性能影响研究  

Research on effects of fine aggregate and superplasticizer on performance of gypsum based self-leveling mortar

作　　者：杨奇玮 杨新亚 王义恒[1] 李莎 YANG Qiwei;YANG Xinya;WANG Yiheng;LI Sha(Huaxin Cement Co.Ltd.,Wuhan 430073,China;Center for Material Research and Analysis,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]华新水泥股份有限公司,湖北武汉430073 [2]武汉理工大学材料研究与测试中心,湖北武汉430070

出　　处：《新型建筑材料》2021年第2期88-91,共4页New Building Materials

基　　金：“863”国家高技术研究发展计划项目(2009AA064004)。

摘　　要：研究了不同种类和颗粒级配细骨料和3种聚羧酸减水剂对掺有氟石膏的复合型石膏基地面自流平砂浆性能的影响。结果表明:当细骨料掺量为20%时,掺入石英砂的自流平砂浆流动性和力学性能均优于掺入碳酸钙砂的自流平砂浆;自流平砂浆的流动性与所掺聚羧酸减水剂的分子结构有关;优化后的自流平砂浆30 min流动度增大5 mm,24 h抗折和抗压强度分别为3.3、9.7 MPa,绝干抗折和抗压强度分别为10.6、27.6 MPa,符合JC/T 1023—2007《石膏基自流平砂浆》的要求。The effects of fine aggregates with different kinds and particle sizes and three kinds of superplasticizer on the properties of fluorgypsum-natural gypsum composite based self-leveling mortar were studied.The results showed that when the amount of fine aggregates was 20%,the flow and mechanical properties of the self-leveling mortar with quartz sand were better than that with calcium carbonate sand.The fluidity of the self-leveling mortar was related to the molecular structures of the superplasticizers.The results of optimized self-leveling mortar were as follows:the fluidity increased 5 mm after 30 min,and the 24 h flexural strength,24 h compressive strength,absolute dry flexural strength and absolute dry compressive strength reached 3.3 MPa,9.7 MPa,10.6 MPa and 27.6 MPa,respectively.They could meet the requirements of JC/T 1023—2007"Gypsum based self-leveling floor compound".

关 键 词：氟石膏 自流平砂浆 细骨料 聚羧酸减水剂 

分 类 号：TU526[建筑科学—建筑技术科学]