A Mechanism Study of Trial Loess Reinforced by F1 Ionic Soil Stabilizer on Curing Mechanism and Strength Characteristics
LI Jiandong1,2, WANG Xu1,2, ZHANG Yanjie1, JIANG Daijun1, LIU Deren1, WANG Jinglong1, Steven3
1 School of Civil Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China 2 National and Provincial Joint Engineering Laboratory of Road & Bridge Disaster Prevention and Control, Lanzhou 730070, China 3 Terra Smart Limited, Hong Kong 810002, China
Abstract: In order to study the reinforcement effect and curing mechanism of F1 ionic soil stabilizer on the loess, different mixing ratios of F1 ionic soil stabilizer were used to reinforce the trial loess. The CBR values, expansion properties, strength parameters and the variation law of soil microstructure before and after curing of loess reinforced by the F1 ionic soil stabilizer were investigated using CBR test, triaxial compression test, SEM scanning and IPP6.0 specific surface/micropore analysis software from the clay particle surface chemistry. The results show that F1 ionic soil stabilizer can reduce the thickness of bound water film on the surface of soil particles, reduce the distance (or volume) between soil particles, increase the gravitational force, and form a tighter arrangement and larger agglomerate laminated structure when crushed, thus reducing the percentage of pore area and morphological distribution dimension of soil particles, and increasing the adhesion strength, shear strength, compactness and stability between soil particles; after adding 0.3 L/m3 (optimum mixture ratio) of F1 ionic soil stabilizer into the trial loess, the friction angle and cohesion increased by 1.36 times and 2.47 times, respectively; F1 ionic soil stabilizer occupies the anion point on the surface of clay particles through ion exchange, which hinders the adsorption of water molecules and greatly reduces the swelling deformation; F1 ionic soil stabilizer has the advantages of green environment and good reinforcement effect, which has broad application prospects in loess filling projects.
李建东, 王旭, 张延杰, 蒋代军, 刘德仁, 王景龙, Steven. F1离子固化剂加固试验黄土机理及强度特性研究[J]. 材料导报, 2021, 35(6): 6100-6106.
LI Jiandong, WANG Xu, ZHANG Yanjie, JIANG Daijun, LIU Deren, WANG Jinglong, Steven. A Mechanism Study of Trial Loess Reinforced by F1 Ionic Soil Stabilizer on Curing Mechanism and Strength Characteristics. Materials Reports, 2021, 35(6): 6100-6106.
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2021, Vol. 35 
