Associated evolutionary mechanism of hydration-pore for montmorillonite modified by ionic soil stabilizer

HUANG Wei; XIANG Wei; LIU Qing-bing; DAO Minh-huan; WANG Zhen-hua; ZHANG Yun-long

doi:10.16285/j.rsm.2017.2400

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Associated evolutionary mechanism of hydration-pore for montmorillonite modified by ionic soil stabilizer

更新时间：2026-06-25

- Associated evolutionary mechanism of hydration-pore for montmorillonite modified by ionic soil stabilizer
- Vol. 39, Issue 10, Pages: 3631-3640(2018)
- 作者机构：
  
  1. 中国地质大学(武汉) 工程学院,湖北,武汉,430074
  2. 中国地质大学(武汉) 教育部长江三峡库区地质灾害研究中心,湖北,武汉,430074
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2017.2400
  CLC： TU411
- Online First：04 November 2018，
  
  Published：2018
- 稿件说明：
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HUANG Wei, XIANG Wei, LIU Qing-bing, et al. Associated evolutionary mechanism of hydration-pore for montmorillonite modified by ionic soil stabilizer[J]. 2018, 39(10): 3631-3640.
DOI：

HUANG Wei, XIANG Wei, LIU Qing-bing, et al. Associated evolutionary mechanism of hydration-pore for montmorillonite modified by ionic soil stabilizer[J]. 2018, 39(10): 3631-3640. DOI： 10.16285/j.rsm.2017.2400.

摘要

以天然钙蒙脱土为研究对象，采用不同浓度的离子固化剂对其进行改性处理，开展素土与改性蒙脱土在相对湿度（P/P0）0～0.95区间的水汽等温吸-脱附试验，通过吸附速率曲线、晶层间距d001值变化曲线分析蒙脱土水合机制，并采用蒙脱土孔隙比变化曲线关联分析水合-孔隙演化规律，提出不同尺度孔隙吸附水的界限相对湿度区间。在此基础上，基于X射线衍射(XRD)、氮气吸附以及压汞试验对离子固化剂改性蒙脱土水合过程的孔隙分布特征进行验证分析。试验结果表明：对于钙蒙脱土，00.8～0.9时，黏土颗粒表面持续吸附弱结合水，此时大孔内逐渐充填水分。离子固化剂通过改变蒙脱土的微观物理化学性质（阳离子与晶层基面）调控其吸附水特性，进而影响不同尺度孔隙的吸附水过程。

Abstract

Natural montmorillonite was studied by adapting ionic soil stabilizer (ISS) with different concentrations. The water vapor isothermal adsorption experiment was conducted on both raw and modified samples in the range of relative humidity (P/P0) from 0 to 0.95. By analyzing water adsorption velocity curves derived from adsorption results and d001 variation with P/P0

montmorillonite hydration mechanism was defined and association analysis of hydration-pore was implemented through void ratio variation with P/P0 that display the boundary relative humidity for pores in different scales adsorbing water. In addition

associated evolutionary mechanism of hydration-pore for montmorillonites conducted by ISS was indicated by different pore size analysis methods such as X ray diffraction (XRD)

nitrogen adsorption and mercury injection test. The results show that

for calcium montmorillonite

the cations interact with water molecules firstly at the range of 00.8-0.9

weak adsorbed water gets into macropores sostenuto. Ionic soil stabilizer regulates the characteristics of adsorbed water by changing the physico-chemical parameters (cations and basal surface of crystal layer) to influence the hydration processes of pores.

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