化学外加剂对轻质脱硫石膏砌块性能的影响  

Effect of chemical admixtures on properties of light desulfurized gypsum blocks

作　　者：张少杰 李辉[1] 陈畅[1] ZHANG Shaojie;LI Hui;CHEN Chang(School of Materials Science and Engineering,Xi′an Univ.of Arch.&Tech.,Xi′an 710055,China)

机构地区：[1]西安建筑科技大学材料科学与工程学院,陕西西安710055

出　　处：《西安建筑科技大学学报（自然科学版）》2021年第4期602-610,共9页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：国家自然科学基金项目(51974218);省部共建西部绿色建筑国家重点实验室开放基金项目(LSKF201907);陕西省教育厅基金(18JK0469)。

摘　　要：采用铝粉、聚羧酸减水剂、柠檬酸、甲基硅酸钠、有机硅1、有机硅2六种不同的外加剂设计正交实验,对脱硫石膏的气孔率、凝结时间、吸水率、软化系数、抗折抗压强度以及微观性能进行分析.研究结果表明:铝粉对于气孔率和力学性能的影响较大,甲基硅酸钠对于吸水率和软化系数的影响较大.同时有机硅、聚羧酸减水剂及柠檬酸对于吸水率、凝结时间、力学性能等均有不同程度的影响.优选的脱硫石膏砌块质轻,孔结构分布均匀,具有较好的力学性能和良好的防水性能.Aluminum powder,polycarboxylic acid water reducing agent,citric acid,sodium methylsilicate,organosilicon 1 and organosilicon 2,were used for orthogonal experiments to analyze the porosity,setting time,water absorption,softening coefficient,flexural and compressive resistance and microscopic properties of desulfurization gypsum blocks.The results showed that aluminum powder had great effect on porosity and mechanical properties,while sodium methylsilicate had great effect on water absorption and softening coefficient.Meanwhile,organosilicon,polycarboxylic acid water reducing agent and citric acid had different effects on water absorption,setting time and mechanical properties.The optimized desulfurization gypsum block,which was light in weight and evenly distributed in pore structure,had good mechanical and waterproof properties.

关 键 词：化学外加剂 脱硫石膏砌块 正交实验 物理性能 力学性能 

分 类 号：TU50[建筑科学—建筑技术科学]