| 摘要: |
| 通过接触角、渗透深度、吸水率这3个参数,研究了有机硅涂覆方式对水泥砂浆防护性能的影响,并采用傅里叶变换红外光谱(FTIR)仪、X射线衍射(XRD)仪、超景深显微镜、扫描电镜(SEM)，对砂浆试件的化学结构、矿物组成及微观形貌进行了表征.结果显示：有机硅的最佳涂覆方式为1次涂覆,涂覆量为250g/m2;有机硅与砂浆试件作用的机制是通过缩合反应生成特征峰为1037cm-1的稳定Si—O键,形成有机硅树脂而使试件表面粗糙度减小,长链的—R基作为疏水端排列在水泥砂浆表面及毛细孔道内,从而起到防护作用. |
| 关键词: 有机硅 涂覆方式 砂浆 防护 机制 |
| DOI：103969/j.issn.1007 9629201904004 |
| 分类号: |
| 基金项目:国家重点研发计划项目(2016YFB0303503);国家自然科学基金资助项目(51502195,51708390);天津市自然科学基金重点资助项目(16JCZDJC39100);水文水资源与水利工程科学国家重点实验室开放基金资助项目(2015491611);天津市土木建筑结构防护与加固重点实验室开放基金资助项目(JGSYS2017 1) |
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| Study on the Protective Mechanism of Organic Silicon Coating on Mortar |
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ZHANG Lei1, GAO Ruixiao1, RONG Hui1, GAO Lixiong2, ZHANG Ying1
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1.School of Materials Science and Engineering, Tianjin Chengjian University, Tianjin 300384, China;2.School of Materials Science and Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043, China
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| Abstract: |
| Contact angle, penetration depth and water absorption rate were measured for organic silicone protective performance of mortar of different coating methods, and Fourier transform infrared spectroscopy(FTIR), X ray diffraction(XRD), ultra depth of field microscope, scanning electron microscope(SEM) were used for characterization of chemical structure, mineral composition and microstructure. The results show that the best coating method of organic silicon is one time coating with a dosage of 250g/m2. The mechanism of the interaction between organic silicon and mortar samples is the formation of stable Si—O bonds with characteristic peak of 1037cm-1 by condensation reaction, and the sample surface roughness decreases by organic silicon resin, long chain —R base as hydrophobic is arranged inside the slurry surface and capillary channel to play a protective role. |
| Key words: organic silicon coating method mortar protection mechanism |
