高掺量SBR的粒径对硫铝酸盐水泥-石膏砂浆性能的影响  

Effect of particle size of high content SBR on the properties of sulfoaluminate cement-gypsum mortar

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作  者:邹永泉 仝亚刚 李征 ZOU Yongquan;TONG Yagang;LI Zheng(China Railway 11th Bureau Group Xi′an Construction Co.,Ltd.,Xi′an 712000,China;Qinghai Traffic Construction Management Co.,Ltd.,Xining 810000,China;Xi′an Huachuang Civil Engineering Science and Technology Co.,Ltd.,Xi′an 710065,China)

机构地区:[1]中铁十一局集团西安建设有限公司,陕西西安712000 [2]青海省交通建设管理有限公司,青海西宁810000 [3]西安华创土木科技有限公司,陕西西安710065

出  处:《混凝土》2024年第11期145-149,154,共6页Concrete

摘  要:研究了在高掺量(15%)下不同粒径的丁苯乳液对硫铝酸盐水泥-石膏砂浆的物理性能和水化特性的影响。结果表明:小粒径的丁苯乳液更有利于提升硫铝酸盐水泥-石膏砂浆的流动度、抗折强度、拉伸黏结强度,并且降低了其抗压强度、毛细孔吸水率和孔隙率。除此之外,小粒径的丁苯乳液比大粒径的丁苯乳液加快了CSA水泥-石膏的水化,促进AFt的生长。The effects of styrene-butadiene copolymer emulsion with different particle sizes on the physical properties and hydration characteristics of sulfoaluminate cement-gypsum mortar were investigated at a high dosage(15%).The results show that small particle size of styrene-butadiene copolymer emulsion was more beneficial to improve the fluidity,flexural strength,tensile adhesive strength of sulfoaluminate cement-gypsum mortar,and reduced the compressive strength,capillary water absorption and porosity of sulfoaluminate cement-gypsum mortar.In addition,small particle size styrene-butadiene copolymer emulsion accelerated the hydration of sulfoaluminate cement-gypsum and promoted the growth of AFt than large particle size styrene-butadiene copolymer emulsion.

关 键 词:硫铝酸盐水泥 石膏 丁苯乳液 水化性能 孔结构 力学强度 

分 类 号:TU528.01[建筑科学—建筑技术科学]

 

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