甲基硅酸钠对土遗址水理性质改善的扫描电镜分析
Scanning Electron Microscope Analysis of Methyl Sodium Silicate on the Improvement of Hydraulic Properties of Earthen Sites
王巍智 1朱耀冬 2朱文利3
作者信息
- 1. 开封大学土木建筑工程学院,河南 开封 475004
- 2. 南华大学,湖南 衡阳 421001
- 3. 开封市第二十七中学,河南 开封 475003
- 折叠
摘要
[目的]在长期雨水冲刷及毛细水作用下,土遗址极易受到干湿循环影响产生裂缝,造成破坏.为增加土遗址疏水性、提升其水理性质,利用防水剂对其进行改善.[方法]选用甲基硅酸钠溶液对土遗址进行喷洒处理,使该溶液经毛细作用进入土样内部,再由碳化反应使土体产生疏水性,并通过SEM电镜分析其疏水原理.[结果]通过电镜分析发现:甲基硅酸钠在碳化作用下使土颗粒表面形成有机硅氧膜.随着喷洒次数的增加,内部独立悬浮土颗粒减少,颗粒间连接力有所增加,土样内部孔隙大量减少,阻断了外界水分的入侵通道,降低了土体吸水率.[结论]通过甲基硅酸钠处理,提高了土遗址的水理性质,为土遗址保护提供了新思路.
Abstract
[Purposes]Under the influence of long-term rain erosion and capillary water,soil sites are highly susceptible to cracks caused by dry-wet cycling.In order to increase the hydrophobicity of soil sites and improve their hydro-physical properties,the waterproof agent is used.[Methods]The soil sites were sprayed with methyl sodium silicate solution,which entered the soil samples through capillary ac-tion and then produced hydrophobicity by carbonization reaction and the hydrophobic principle was ana-lyzed by SEM electron microscope.[Findings]It was found that the carbonization of methyl sodium sili-cate made silicone oxygen film on the surface of soil particles.With the increase of spraying times,the in-ternal independent suspended soil particles decreased,the connection force between particles increased,and the internal pores of the soil samples reduced greatly,which blocked the intrusion channel of exter-nal water and reduce the water absorption rate of the soil.[Conclusions]The hydrological properties of earthen sites were improved by methyl sodium silicate treatment,which provided a new idea for the pro-tection of earthen sites.
关键词
土遗址/疏水性/SEM电镜/毛细作用Key words
earthen ruins/hydrophobicity/SEM electron microscope/capillary action引用本文复制引用
出版年
2024
NETL
NSTL
万方数据