期刊文献+

原位纳米SiO2防护剂对水泥砂浆防护效果的试验研究 被引量:1

Research on Protective Effect of In-situ Nano-SiO2 Protective Liquid on Cement Mortar
下载PDF
导出
摘要 为阻止空气中CO2渗入混凝土以提高其耐久性能,在试件表面采取涂刷由正硅酸乙酯(TEOS)、乙醇和水配制成的纳米SiO2防护剂的方法,待充分反应后,测试试件吸水率和碳化深度并对试件横断面进行显微硬度检测。试验结果表明:1)不同配合比的防护剂均可降低砂浆吸水率和碳化深度,当防护剂配比为乙醇∶水∶TEOS=4∶1∶3时防护效果最明显,其中吸水率可降低73%,碳化深度至少降低50%;2)根据显微硬度以及碳化试验结果,试件表层硬度随着防护剂的渗入逐渐提高,其有效作用深度为1 mm-2 mm。结论是原位纳米SiO2防护剂可用于混凝土表层防护,可提高结构的耐久性。 In order to prevent CO2 in the air from infiltrating into the concrete and improve its durability,the specimen surface was coated with Nano-SiO 2 protective agent made of ethyl orthosilicate(TEOS),ethanol and water.After the reaction was completed,the water absorption and carbonization depth of the specimen were tested,and the cross-section of the specimen was tested for microhardness.The test results show that:1)protective agents of different mixture ratio can reduce the water absorption rate and carbonization depth of mortar,when the ratio of protective agents is ethanol:water:TEOS=4∶1∶3,the protective effect is the most obvious,which can reduce the water absorption rate by 73%,carbonization depth by at least 50%;2)according to the microhardness and carbonization test results,the surface hardness of the specimen increases gradually with the penetration of protective agent,and its effective depth of action is 1mm-2mm.The conclusion is that in situ Nano-SiO2can be used to protect the surface of concrete and improve the durability of the structure.
作者 夏培斋 韩乐冰 高莹 孙仁娟 XIA Peizhai;HAN Lebing;GAO Ying;SUN Renjuan(Jinan Jinnuo Highway Engineering Supervision Co.,Ltd.,Jinan 250101,China;School of Qilu Transportation,Shandong University,Jinan 250061,China)
出处 《公路交通技术》 2020年第1期28-33,共6页 Technology of Highway and Transport
基金 山东省自然科学基金项目(ZR2016EEM03)
关键词 纳米SIO 2 正硅酸乙酯 吸水性 抗碳化性能 显微硬度 nano-SiO 2 TEOS water absorption carbonization resistance microhardness
  • 相关文献

参考文献9

二级参考文献29

共引文献208

同被引文献8

引证文献1

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部