折光率仪快速测定盐渍土总盐含量的方法研究  

Methodological studies on rapid determination of salt content in saline soils by refractometer

作　　者：冯金凤 李晓民[2] 赵静卓 魏定邦 魏强 魏小龙 武旭 邵敏刚 FENG Jinfeng;LI Xiaomin;ZHAO Jingzhuo;WEI Dingbang;WEI Qiang;WEI Xiaolong;WU Xu;SHAO Mingang(Gansu Provincial Transportation Planning Survey and Design Institute,Lanzhou 730030;Lanzhou Jiaotong University,Lanzhou 730030)

机构地区：[1]甘肃省交通规划勘察设计院股份有限公司,甘肃兰州730030 [2]兰州交通大学,甘肃兰州730030

出　　处：《中国建材科技》2024年第2期41-45,共5页China Building Materials Science & Technology

基　　金：甘肃省科技重大专项—工业类(21ZD3GA002)。

摘　　要：建筑面临的腐蚀现象中盐害问题最突出。为快速、准确测定总盐含量,研究了折光率仪检测盐渍土总盐含量的方法。选取甘肃河西地区58个土样为研究对象,制备了不同土水比浸出液,使用折光率仪测定浸出液的折光率。建立了土壤总盐含量与不同土水比浸出液折光率之间的相关性曲线。结果表明,土壤总盐含量与不同土水比浸出液折光率之间呈显著正相关,其中,土壤总盐含量与土水比1:1浸出液折光率的相关性最紧密。同时,提出了一种通过测定浸出液折光率,由建立的相关性方程测定土壤总盐含量的方法。The problem of salt damage is the most prominent among the corrosion phenomena faced by buildings.In order to quickly and accurately determine the total salt content,using refractometer to detect total soil salt content is studied.58 soil samples from Hexi region of Gansu are selected for the study,and leaching solutions with different soil-water ratios are prepared.The refractive indexes of these leachates are determined by refractometer.Correlation curves are established between total soil salt content and refractive index of leachates with different soil-water ratios.The results show a significant positive correlation between total soil salt content and refractive index of leachates with different soil-water ratios.Among them,the correlation at soil-water ratio 1:1 is the strongest.And a method is proposed to determine total soil salt content by measuring refractive index of the leachate and using the established correlation equation.

关 键 词：总盐含量 折光率 浸出液 相关性 

分 类 号：TU448[建筑科学—岩土工程]