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

作　　者：王巍智 朱耀冬 朱文利 WANG Weizhi;ZHU Yaodong;ZHU Wenli(School of Civil Engineering and Architecture of Kaifeng University,Kaifeng 475004,China;University of South China,Hengyang 421001,China;Kaifeng No.27 Middle School,Kaifeng 475003,China)

机构地区：[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

出　　处：《河南科技》2024年第6期81-86,共6页Henan Science and Technology

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。[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 action and then produced hydrophobicity by carbonization reaction and the hydrophobic principle was analyzed by SEM electron microscope.[Findings]It was found that the carbonization of methyl sodium silicate made silicone oxygen film on the surface of soil particles.With the increase of spraying times,the internal 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 external 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 protection of earthen sites.

关 键 词：土遗址 疏水性 SEM电镜 毛细作用 

分 类 号：TU-87[艺术—艺术设计] K878[建筑科学—建筑设计及理论]