摘要
混凝土表面涂覆有机硅类防水材料是提高水泥基材料耐久性的有效措施之一。研究了聚烷基三烷氧基硅氧烷(PATOS)乳液对水泥基材料毛细吸水特性、氯离子侵蚀性能、抗碳化性能、透气性能的影响。结果表明,PATOS乳液涂覆在混凝土表面后,能够渗透进入水泥基材料毛细孔,并生成网状硅氧烷聚合物憎水膜,显著降低混凝土毛细吸水系数,延缓氯离子的侵入,在混凝土表面建立了良好的氯离子隔离层,提高氯盐环境下混凝土的耐久性。但是不会堵塞毛细孔和粗大孔。所以外部气体能够进入混凝土内部,保持一定的透气性。但是气体进入速度和进入量均降低,从而提高了混凝土的抗碳化性能。
The application of silicone waterproof material on concrete surface is one of the effective measures to improve the durability of cement-based materials.The effects of poly alkyltrialkoxysiloxane(PATOS)emulsion on the capillary water absorption,chloride ion erosion,carbonization and air permeability of the cement-based materials are systematically evaluated.The results show that after the PATOS emulsion is coated on the concrete surface,it can penetrate into the fine pores of the cement-based material and produce a reticulated siloxane polymer hydrophobic film,which can significantly reduce the water absorption coefficient of the concrete,postpone the invasion of the chloride ion,and establish a good chloride barrier layer during the concrete surface,which improves the durability of concrete under chlorine salt environment.But it won′t clog the pores and the large holes.So the external gas can enter the concrete and maintain a certain permeability.However,the gas entry speed and entry volume decrease,thus improving the carbonation resistance of concrete.The test results provide experimental and theoretical basis for engineering application of silicone waterproofing agent.
作者
田玉鹏
王鹏刚
赵铁军
王兰芹
李刚
叶守杰
TIAN Yupeng;WANG Penggang;ZHAO Tiejun;WANG Lanqing;LI Gang;YE Shoujie(Qingdao University of Technological,Qingdao 266033,China;Shandong Jianzhu University,Jinan 250101,China;Qingdao Metro Group Co.,Ltd.,Qingdao 266033,China)
出处
《混凝土》
CAS
北大核心
2019年第11期69-73,共5页
Concrete
基金
国家重点研发计划资助项目（2017YFB0310000）
国家自然科学基金青年基金（51608286）
山东省自然科学基金（ZR2016EEP01）
青岛市应用基础研究计划项目（17-1-1-13-jch）
青岛地铁科研项目（R3-ZX-2018-11）
