多壁碳纳米管的类型对水泥砂浆强度的影响机理  

Mechanism of Effect of Multi-walled Carbon Nanotubes Types on Strength of Cement Mortar

作　　者：杨凡 杨杰 赵欣宇 杨宝森 侯文诗 YANG Fan;YANG Jie;ZHAO Xin-yu;YANG Bao-sen;HOU Wen-shi(Beijing Zhongyan Parking Technology Co,Ltd,Beijing 100041,China;China Railway Guangzhou Engineering Group Co,Ltd,Guangzhou 510000,China)

机构地区：[1]北京中岩大地科技股份有限公司,北京100041 [2]中铁广州工程局集团港航工程有限公司,广州510000

出　　处：《建材世界》2022年第6期10-12,37,共4页The World of Building Materials

摘　　要：探究了碳纳米管的类型和掺量对水泥砂浆强度的影响,并通过背散射和压汞等微观方法分析了其影响机理。抗压和抗折测试结果表明,碳纳米管掺量为0.08%时,砂浆的强度最高,其中羧基碳纳米管对砂浆强度的提升效果最佳。微观结果表明,碳纳米管可以降低砂浆的最可几孔径、孔隙率和界面过渡区厚度,这解释了其提升强度的机理。The effects of the type and content of carbon nanotubes(CNTs)on the strength of cement mortar were explored,and the mechanism was analyzed by micro methods(backscattering and mercury injection).The compressive and flexural test results showed that when the content of CNTs was 0.08%,the strength of mortar was the highest,and the carboxyl CNTs had the best effect on improving the strength of mortar.The microscopic results showed that CNTs could reduce the most probable pore size,porosity and the thickness of interface transition zone,which explained the mechanism of the increase of strength.

关 键 词：水泥砂浆 碳纳米管 孔隙 界面过渡区 

分 类 号：TU578.1[建筑科学—建筑技术科学]