建筑工程的纳米偏高岭土对水泥胶砂性能影响的研究  

Research on the Effect of Nanometer Metakaolin in Construction Engineering on the Properties of Cement Cement

作　　者：田颖[1] TIAN Ying(School of Civil Engineering,Shaanxi Polytechnic Institute,Xianyang Shaanxi 712000,China)

机构地区：[1]陕西工业职业技术学院土木工程学院,陕西咸阳712000

出　　处：《粘接》2020年第3期123-126,136,共5页Adhesion

摘　　要：基于偏高岭土尺寸及活性效应,研究了不同掺量的纳米偏高岭土对水泥胶砂工作、力学和渗透性能的影响,并从微观角度揭示了纳米偏高岭土对水泥胶砂微观结构的影响。研究结果表明:与普通水泥胶砂相比,掺入纳米偏高岭土降低了水泥胶砂的工作性能,增强了水泥砂浆的力学和渗透性能;纳米偏高岭土的最佳掺量为3%,3%纳米偏高岭土水泥胶砂试件在3d的抗折强度较普通水泥胶砂提高13.80%,抗压强度提高9.66%,28d的氯离子扩散系数降低7.78%,微观测试结果表明:适量的纳米偏高岭土能促进水泥水化进程,使内部裂纹和孔隙减少,微观结构更加密实。Based on the size and activity effect of metakaolin,the influence of nanometer metakaolin with different dosage on the work,mechanics and permeability of cement mortar was studied,and the influence of nanometakaolin on the microstructure of cement mortar was revealed from a microscopic perspective.The research results show that:compared with the ordinary cement mortar,mixed with nano metakaolin degrade the performance of the cement mortar,enhance the mechanical and permeability of the cement mortar;The optimum content of nanometakaolin was 3%,the flexural strength of the 3%nanometer metakaolin cement mortar specimen at 3d is 13.80%higher than that of ordinary cement mortar,the compressive strength increased by 9.66%,and the 28-day chloride ion diffusion coefficient is reduced by 7.78%.Microscopic test results show that the right amount of nanometer metakaolin can promote the cement hydration process,reduce internal cracks and pores,microscopic structure more compact.

关 键 词：建筑工程 偏高岭土 力学性能 扩散系数 微观结构 

分 类 号：TU528[建筑科学—建筑技术科学]