F1离子固化剂加固试验黄土机理及强度特性研究

doi:10.11896/cldb.20050034

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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.

Key words： loess ionic soil stabilizer curing mechanism

Published: 23 March 2021

CLC number:

TU472

Fund:National Natural Science Foundation of China (41662017,51868038) and National Key R&D Program of China (2017YFB1201204).

About author:: Jiandong Li, male, born in November 1992, doctoral candidate of Highway & Railway Engineering, Lanzhou Jiaotong University. His research interests include foundation treatment & engineering in loess region.
Xu Wang is a professor in the Department of Civil Engineering at Lanzhou Jiaotong University. He received his B.S., M.S. and Ph.D. degree from Southwest Jiaotong University. Mainly engaged in civil engineering teaching, scientific research and management, engaged in regional geotechnical theory and applied research. He has published more than 80 academic papers in acade-mic journals at home and abroad, participated in the compilation of two textbooks and monographs, and granted 19 national invention patents. His research achievements have won the provincial award for scientific and technological progress and the science and technology award of China railway society. He served as a member of the Editorial Committee of Subgrade Engineering, the Railway Society, the Railway Engineering Committee, the Geological and Road foundation Professional Committee, the National Wet Trap Loess Commission and the Foundation Committee, and the National Pile Foundation Engineering Society, the Stan-ding Institute of Rock Mechanics and Engineering in Gansu Province and the Civil and Civil Construction Society of Gansu Province.

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Cite this article:

LI Jiandong,WANG Xu,ZHANG Yanjie, et al. A Mechanism Study of Trial Loess Reinforced by F1 Ionic Soil Stabilizer on Curing Mechanism and Strength Characteristics[J]. Materials Reports, 2021, 35(6): 6100-6106.

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http://www.mater-rep.com/EN/10.11896/cldb.20050034 OR http://www.mater-rep.com/EN/Y2021/V35/I6/6100

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