消泡剂对磷建筑石膏孔隙率及强度的影响  

Effect of defoamer on porosity and strength of phosphogypsum-based building plaster

作　　者：司鹏超 薛凯喜[1] 储怡鑫 胡艳香[1] 王升福 杨叶昊 SI Pengchao;XUE Kaixi;CHU Yixin;HU Yanxiang;WANG Shengfu;YANG Yehao(School of Civil Engineering,East China University of Technology,Nanchang 330013,China)

机构地区：[1]东华理工大学土木与建筑工程学院,江西南昌330013

出　　处：《新型建筑材料》2024年第5期7-12,共6页New Building Materials

基　　金：国家自然科学基金项目(42167024)。

摘　　要：添加外加剂是改善建筑石膏性能的主要方法。采用单因素试验,研究了有机硅消泡剂和聚醚改性有机硅消泡剂对磷建筑石膏硬化体孔隙率、强度、软化系数和吸水率的影响,并从微观角度分析影响机理。结果表明,有机硅消泡剂的掺量在0~1.50%时对磷建筑石膏浆体具有缓凝作用,初凝时间从4 min延长至8 min,终凝时间从9 min延长至17 min。有机硅消泡剂在掺量为0~0.50%或聚醚改性有机硅消泡剂在掺量为0~1.50%时会提高磷建筑石膏硬化体的强度,聚醚改性有机硅消泡剂对于磷建筑石膏的性能提升效果更优。Adding additives is the main way to improve the performance of building plaster.In this paper,the effects of silicone defoamer and polyether modified silicone defoamer on the porosity,strength,softening coefficient and water absorption of phosphogypsum-based building plaster hardened body were also studied,and its influence mechanism was analyzed from the microscopic point of view.The results showed that the silicone defoamer had retarding effect on phosphogypsum-based building plaster paste when the content was 0~1.50%,the initial setting time increased from 4 min to 8 min and the final setting time increased from 9 min to 17 min.Silicone defoaming agent with 0 to 0.50% or polyether modified silicone defoaming agent with 0 to 1.50% can improve the strengths of phosphogypsum-based building plaster hardened body.Polyether modified silicone defoaming agent is better for improving the performance of phosphogypsum-based building plaster.

关 键 词：建筑石膏 消泡剂 孔隙率 强度 性能优化 

分 类 号：TU528.042.5[建筑科学—建筑技术科学]