摘要
为了研究Ti O2对高延性水泥基复合材料性能的影响,采用纳米Ti O2制备具有光催化性能的PVA纤维增强水泥基复合材料,综合测试并分析了复合材料的强度、韧性和光催化性能,并结合SEM对试件进行微观扫描分析。研究结果表明,掺入Ti O2后复合材料的抗压强度无明显变化,但抗折强度随Ti O2掺量的增加先增大后减小;当Ti O2的掺量为9%时,试件7 d和28 d抗折强度均达到最大值,荷载-挠度曲线塑性变形阶段曲线平缓,韧性指标I5、I10值最大,韧性最好;试件催化降解NOx的效率随Ti O2掺量的增大呈先增大后减小,Ti O2的掺量为6%时光催化降解率最大;当Ti O2掺量继续增大时,因其分散性变差而使光催化性能降低。
To study the effect of TiO2 on the properties of high ductility cementitious composites,nano-TiO2 was used to prepare PVA fiber reinforced cementitious composites with photocatalytic function. The strength,toughness and photocatalytic properties of the composites were tested,and a microscopic analysis of the specimens was performed by SEM. The results show that the compressive strength of the composites does not change after adding TiO2. But the flexural strength increases firstly and then decreases with the increase of TiO2 content. When the TiO2 content is 9%,the flexural strength of 7 d and 28 d and the ductility index I5,I10 are the best,as well as the toughness. The efficiency of NOxdegradation firstly increases and then decreases with the increase of TiO2 contents. When TiO2 content is 6%,the photocatalytic degradation rate is the highest; when the content of TiO2 increases furthermore,its dispersion deteriorates to reduce the photocatalytic performance.
出处
《广西大学学报（自然科学版）》
CAS
北大核心
2018年第1期371-378,共8页
Journal of Guangxi University（Natural Science Edition）
基金
国家自然科学基金资助项目(51508030)
青海省重大科技专项计划项目(2014-GX-A2A)
长安大学中央高校基本科研业务费专项资金资助项目(310831162001
310831161001)
关键词
道路工程
水泥基复合材料
PVA纤维
二氧化钛
力学性能
光催化性能
road engineering
cement-based composites
PVA fiber
titanium dioxide
mechanicalproperties
photocatalytic performance
