新型改性水溶性生态土壤稳定剂的微观特性及固土机理分析
Microscopic characteristics of new modified water-soluble polymer material and stabilization mechanism of its stabilized soil

为揭示新型改性水溶性高分子材料（W-OH固化材料）的微观特性与生态固土机理，通过红外光谱、 元素分析、 热重分析、 X射线粉末衍射、 BET测试、 扫描电镜等方法分析W-OH水溶液固化体和W-OH固化土体的微观结构及固土机理. 结果表明： W-OH固化材料与W-OH水溶液固化体主要含有酰胺、 烷基等官能团；不同体积浓度的W-OH水溶液固化体老化后的特征衍射峰位置、 吸收峰强度基本一致. W-OH水溶液固化体中C、 N、 H元素质量含量随浓度增大而减少且随老化时间的增长而趋于稳定. W-OH水溶液固化体老化前后的起始失重温度分别为25℃和260℃. 老化前后，不同体积浓度W-OH固化土体的比表面积与孔容变化趋势一致；随老化时间增加，比表面积增加但孔容变化不明显. W-OH固化土体中并没有产生新的官能团与矿物成分，只是与土体发生交联、 吸附、 絮凝等作用，达到加固土体的作用.
In order to reveal the microscopic characteristics of new modified water-soluble polymer material (W-OH material) and stabilization mechanism of its stabilized soil，microstructure and stabilization mechanism of solidification of W-OH aqueous solution and W-OH stabilized soil were analyzed based on a series of tests including infrared spectroscopy，elemental analysis，thermogravimetric analysis，X-ray diffraction，BET test，scanning electron microscope. The results show that both W-OH material and solidification of W-OH aqueous solution consist of amide，alkyl and other functional groups. The position of characteristic diffraction peaks and the absorption peak strength of solidification of W-OH aqueous solution will not change along with the aging time. The content of C，N and H in solidification of W-OH aqueous solution decreases with the increase of concentration of W-OH and tend to be stable with the increasing of the aging time. The initial weight-loss temperature of solidification of W-OH aqueous solution before and after aging are 25℃ and 260℃，respectively. The change trend of specific surface areas and pore volumes of W-OH stabilized soil before and after aging are consistent. The specific surface areas increase with increasing aging time，but pore volumes do not change significantly. There are no new functional groups and mineral composition in W-OH stabilized soil. W-OH has a cross-linking，adsorption and flocculation effect on soil and achieves the role of reinforced soil