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材料研究学报  2014, Vol. 28 Issue (6): 443-447    DOI: 10.11901/1005.3093.2013.879
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海洋工程钢筋混凝土纳米硅渗透型防护剂的制备和性能*
徐强1,3,詹树林2,张启龙1,盛建松1,3,杨辉1,3()
1. 浙江大学材料科学与工程系 杭州 310027
2. 浙江大学建筑工程学院 杭州 310027
3. 浙江加州国际纳米技术研究院 杭州 310058
Preparation and Properties of Nano-silicone Marine Reinforced Concrete Permeable Protective Coating
Qiang XU1,3,Shulin ZHAN2,Qilong ZHANG1,Jiansong SHENG1,3,Hui YANG1,3,**()
1. Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027
2. College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310027
3. Zhejiang-California International Nanosystems Institute, Hangzhou 310058
引用本文:

徐强,詹树林,张启龙,盛建松,杨辉. 海洋工程钢筋混凝土纳米硅渗透型防护剂的制备和性能*[J]. 材料研究学报, 2014, 28(6): 443-447.
Qiang XU, Shulin ZHAN, Qilong ZHANG, Jiansong SHENG, Hui YANG. Preparation and Properties of Nano-silicone Marine Reinforced Concrete Permeable Protective Coating[J]. Chinese Journal of Materials Research, 2014, 28(6): 443-447.

全文: PDF(3267 KB)   HTML
摘要: 

以TEOS和MTES为前驱体, 将盐酸催化的酸性硅溶胶按比例滴入氨水催化的碱性硅溶胶中, 用酸碱两步法制备出海洋工程钢筋混凝土纳米硅渗透型防护剂。用透射电镜(TEM)、扫描电镜(SEM)、砂浆渗透深度、砂浆毛细吸水试验及混凝土氯离子电通量试验等手段对渗透型防护剂结构和性能进行了表征。结果表明: 用酸碱两步法制备出类核壳结构二氧化硅颗粒溶胶, 防护剂处理砂浆表面呈现明显类核壳结构点坑, 砂浆渗透深度为1.3 mm, 处理4 h表面吸水率降低85%以上, 防护剂处理混凝土6 h氯离子电通量降低50%以上。

关键词 复合材料渗透型防护剂溶胶凝胶海工混凝土快速固化    
Abstract

With TEOS and MTES as precursors, nano-silicone permeable protective coating of marine concrete was prepared by acid/base two-step sol gel method where hydrochloric acid catalyzed silica sol was dropped into proportionally ammonia catalyzed base silica sol. The structure and properties of the coating were characterized by TEM, SEM, water absorption, chloride ion passed charge. The results show that for core-shell structure of SiO2 sol prepared by acid/base two-step, dot-pits were observed on the treated mortar sample surfaces, penetration depth of mixed sol coated mortars was 1.3 mm, 4 h water absorption of mortar samples were lower than 85% or more, 6h chloride ion passed charge of concrete samples reduced by 50% or more.

Key wordscomposite materials    penetrating protectant    sol-gel    marine reinforced concrete    fast curing
收稿日期: 2013-11-23     
基金资助:* 国家科技支撑计划项目2013BAJ10B05和浙江大学海洋学科交叉研究引导基金2012HY003B资助。
图1  不同有机硅颗粒的TEM像
图2  不同砂浆样品的表面扫描电镜照片
图3  不同砂浆表面的质量吸水率
Sample Diameter/nm a:b proportion Final current/mA Charge passed/C
1-1 30 2:1 22.3 536.4
1-2 30 4:1 24.6 591.7
2-1 50 2:1 26.8 645.4
2-2 50 4:1 21.5 518.4
3-1 - 1:0 21.6 521.0
0-1 - - 52.1 1254.3
表1  不同防护剂处理混凝土氯离子电通量
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