聚合物对水泥基材料防水和韧性影响的研究  

Effect of Polymer on Waterproof Performanceand Toughness of Cement-based Materials

作　　者：赵明哲 唐雷 陈李峰 唐龙龙 宋建桓 庄强 ZHAO Mingzhe;TANG Lei;CHEN Lifeng;TANG Longlong;SONG Jianhuan;ZHUANG Qiang(CCCC Third Highway Engineering Co.,Ltd.,Beijing 101300,China;Jiangsu Sinoroad Engineering Technology Research Institute Co.,Ltd.,Nanjing 210000,China;Nanjing Hualu Engineering Design Co.,Ltd.,Nanjing 210000,China)

机构地区：[1]中交第三公路工程局有限公司,北京101300 [2]江苏中路工程技术研究院有限公司,南京210000 [3]南京市华路工程设计有限公司,南京210000

出　　处：《交通科技》2022年第5期107-111,共5页Transportation Science & Technology

基　　金：江西省交通厅科技项目(2020H0047);中交三公局科技项目(3GS-TL-JS-04-2021);南航大创基金(02110287051E)资助。

摘　　要：对于水泥混凝土路面,传统的修补材料存在强度低、黏结性差等缺点,而聚合物具有优异的柔韧性及良好的抗渗性等固有优势。文中选取有机硅丙烯酸、水性环氧和丙烯酸3种有机聚合物乳液,按不同聚灰比掺入水泥基材料后对其流动性、吸水率、抗压与抗折强度、弯压比进行研究和微观分析。结果表明,掺水性环氧树脂可提高水泥基材料的流动性,聚灰比0.15时,吸水率较未掺时降低了61.8%。掺3种聚合物乳液均降低了水泥基材料抗压强度,其中掺水性环氧时抗压强度损失最小,为13.9%,但提高了水泥基材料的抗折强度和弯压比,提升幅度为16.6%和40.8%,改善了水泥基材料韧性。聚合物颗粒通过填充产物的孔隙,并在水化产物的表面上形成连续的聚合物膜,使内部结构致密,提高了水泥基材料的抗水渗和抗侵蚀等性能。Due to its excellent flexibility and good impermeability, polymer can be combined with cement-based materials to improve the physical and mechanical properties of traditional cement-based materials. Three kinds of polymer emulsion were selected and mixed into the cement base material to study the effects of different polymer emulsions on the physical properties of fluidity and water absorption, mechanical properties of compressive strength, flexural strength, and bending compression ratio, and microstructure of cement-based materials. The three polymers are organic silicone acrylate, epoxy resin and acrylic acid emulsion, respectively. The results show that the water-doped epoxy resin can improve the flow performance of cement-based materials, and the water absorption is reduced by 61.8% with the cement ratio of 0.15. The compressive properties of cement-based materials is reduced with the incorporation of three kinds of polymer emulsions. The compressive strength loss of water-based epoxy is the smallest with loss value of 13.9%, but the flexural strength and flexural compression ratio of cement-based materials are increased by 16.6% and 40.8%, and the toughness of cement-based materials is improved. The pores of the products are filled with the polymer particles, and a continuous polymer film on the surface of the hydration products is formed, which makes the internal structure more compact and improves the properties of cement-based materials such as anti-permeability and anti-erosion.

关 键 词：聚合物 水泥基材料 流动性 防水 力学性能 

分 类 号：U414[交通运输工程—道路与铁道工程] U444[建筑科学—桥梁与隧道工程]