纳米ZrO2对水泥基材料性能的改性作用  

Modification Effect of Nano-ZrO2 on Properties of Cement-based Materials

作　　者：吴福飞[1] 董双快[1] 陈亮亮 叶鸿宏 郭爽 WU Fu-fei;DONG Shuang-kuai;CHEN Liang-liang;YE Hong-hong;GUO Shang(School of Materials and Architectural Engineering,Guizhou Normal University,Guiyang 550025,China;Chongqing Water Resources and Electeic Engineering College,Chongqing 402160,China;China West Construction Guizhou Co.,Ltd.,Guiyang 550004,China)

机构地区：[1]贵州师范大学材料与建筑工程学院,贵州贵阳550025 [2]重庆水利电力职业技术学院,重庆402160 [3]中建西部建设贵州有限公司,贵州贵阳550004

出　　处：《水电能源科学》2020年第8期109-113,共5页Water Resources and Power

基　　金：贵州省教育厅青年科技人才成长项目(黔教合KY字[2018]125号);贵州省科技厅-贵州师范大学联合基金项目(黔科合LH字[2017])7351号;重庆市教委科学技术研究项目(KJQN201903801),重庆水利电力职业技术学院科研重点项目(KRC201803);贵州师范大学2016年博士科研启动项目(0517073);贵州省科学技术基金项目(黔科合J字LKS[2013]41号,黔科合LH字[2014]7046号)。

摘　　要：为了研究纳米ZrO2对水泥基材料抗压强度、孔隙率和渗透性能的改性作用,以30nm ZrO2为研究对象,研究纳米ZrO2掺量(1%、2%、4%、8%)对水泥基材料性能的影响,并分析其作用机制。试验结果表明,纳米ZrO2掺量为1%、2%、4%、8%时,水泥基材料的化学收缩约为对照组的87.7%、98.4%、117.1%、117.6%;抗压强度约提高了53%~135%;孔隙率和渗透系数分别降低5.4%~19.9%、7.9%~17.3%。综合分析发现,纳米ZrO2的作用机制主要是填充效应和晶核作用,即通过填充作用,降低了孔隙率达到提高抗压强度和降低渗透性能的目的;同时通过晶核作用加速了水泥的水化。In order to study the effect of nano-ZrO2 on the compressive strength,porosity and permeability of cementbased materials,taking 30 nm nano-ZrO2 as the research object,the impact of nano-ZrO2 content(1%,2%,4%and8%)on the properties of cement-based materials was studied,and its mechanism was analyzed.The test results show that when the content of nano-ZrO2 was 1%,2%,4%,8%,the chemical shrinkage of cement-based materials was about87.7%,98.4%,117.1%and 117.6%of the control group;The compressive strength increased by 53%~135%.The porosity and permeability decreased by 5.4%~19.9%and 7.9%~17.3%,respectively.Through comprehensive analysis,it was found that the action mechanism of nano-ZrO2 was mainly the filling effect and crystal nucleus effect.By filling effect,it can improve the compressive strength and reduce the porosity and permeability.At the same time,the hydration of cement was accelerated by the crystal nucleation.

关 键 词：纳米ZRO2 抗压强度 孔隙率 作用机制 

分 类 号：TU528.01[建筑科学—建筑技术科学]