磷酸镁水泥制备加气混凝土砌块抹面砂浆的试验研究  

Study on experimental preparation of magnesium phosphate cement plastering mortar for autoclaved aerated concrete block

作　　者：钱红萍[1] 李书进[1] 黄小红[1] 周一一 李雄威[1] 

机构地区：[1]常州工学院常州市建设工程结构与材料性能研究重点实验室,江苏常州213002

出　　处：《混凝土》2017年第11期161-165,共5页Concrete

基　　金：江苏省产学研前瞻性联合研究项目(BY2015029-01);国家自然科学基金项目(51678083)

摘　　要：针对加气混凝土砌块的多孔和吸水慢的性能特点,采用磷酸镁水泥配制备出适用于加气混凝土的抹面砂浆。研究了粉煤灰掺量和漂珠体积掺量对抹面砂浆保水率、抗压强度、黏结强度、导热系数和干缩率的影响。结果表明,掺入漂珠可大幅度降低砂浆的导热系数,但在一定程度降低其力学性能和保水性,当漂珠完全取代石英砂时,所制备的砂浆导热系数为0.28 W/(m·K),14 d黏结强度为0.60 MPa,干缩率仅为0.050 mm/m,用于加气混凝土砌块抹面可解决抹面砂浆存在的开裂、空鼓问题。To solve the slower characteristics of aerated concrete block porosity and water absorption,prepared a plaster mortar using magnesium phosphate cement.The influence of fly ash dosage and cenospheres volume content on mortar water retention,compressive strength,bond strength,thermal conductivity coefficient and dry shrinkage are studied.Results show that the mixed with cenospheres can greatly decrease thermal conductivity coefficient of mortar,but to a certain extent reduce the mechanical properties and water retention,when cenospheres completely replace the quartz sand,the thermal conductivity coefficient of mortar is only 0.28 W/（m·K）,14 d bond strength is 0.60 MPa,and the drying shrinkage rate is only 0.050 mm/m.when plaster the aerated concrete block surface,it can solve the problems of cracking and hollowing.

关 键 词：磷酸镁水泥 加气混凝土 抹面砂浆 抗压强度 导热系数 

分 类 号：TU528.01[建筑科学—建筑技术科学]