聚合物掺量对聚合物快硬水泥砂浆抗冻性的影响  

Influence of polymer additive amount on frost-resistance of polymer-modified fast-hardening cement mortars

作　　者：南雪丽[1,2] 邵楷模 杨兰兰[1,2] 韩博[1,2] 王超杰[1,2] 

机构地区：[1]兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室,甘肃兰州730050 [2]兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室,甘肃兰州730050

出　　处：《兰州理工大学学报》2016年第6期134-137,共4页Journal of Lanzhou University of Technology

基　　金：甘肃省自然科学基金(1508RJZA107);甘肃省建设厅科技攻关项目(JK2012-30);甘肃省有色金属新材料重点实验室开放基金

摘　　要：为研究聚合物掺量对聚合物快硬水泥砂浆抗冻性的影响,对比不同聚合物掺量下快硬水泥砂浆的抗冻性;并通过压汞法测试不同聚合物掺量下砂浆的孔结构,进而研究聚合物掺量对水泥砂浆孔结构、孔隙率及孔径分布产生的影响;探明孔结构与其抗冻性的内在联系;借助红外光谱对其改性机理进行深入研究.研究结果表明:聚合物快硬水泥砂浆的抗冻性随聚合物掺量的增加而提高,当聚合物质量分数为4%时,其综合性能最佳;随聚合物掺量的增加,聚合物快硬水泥砂浆孔结构得以改善,虽总孔隙率有所增加,但其中值孔径、体密度、平均孔径均减小.此外,红外光谱表明聚合物与快硬水泥水化产物发生了反应,这也是导致聚合物快硬水泥砂浆性能改善的重要原因.In order to investigate the effect of additive amount of polymer on frost-resistance of polymer fast-hardening cement mortar, the frost resistance of fast-hardening cement mortar with different polymer content was compared with each other, and its pore structure was tested by using mercury intrusion meth- od, so that the influence of polymer content on pore cement mortar was further investigated, the intrinsic id hardening cement mortar was made clear. With structure, porosity, and pore size distribution in the linkage of frost-resistance with pore structure of rap- the help of infrared spectroscopy, its modification mechanism was studied thoroughly. The investigation result shows that the antifreeze performance of this cement mortar will be improved with the increase of the polymer content. When the polymer content is 4~, the comprehensive performance of the cement mortar will be optimal. With the increase of the poly- mer content, the pore structure will be improved. Although the total porosity may increase to some ex- tent, the median pore diameter, bulk density, and average pore diameter will all decrease. In addition, the infrared spectroscopy shows that a reaction of polymer with hydration product of the fast-hardening cement take place, which will be an essential reason of performance improvement of polymer fast-hardening ce- ment mortar.

关 键 词：聚合物快硬水泥砂浆 抗冻性 孔结构 红外光谱 

分 类 号：TU528.58[建筑科学—建筑技术科学] U414[交通运输工程—道路与铁道工程]