TAN B, LI L L, CHEN P, et al． Study on mechanical properties of steel slag cement stabilized soil by different factors[J]. Journal of Henan Polytechnic University( Natural Science)， doi: 10.16186/j.cnki.1673-9787.2024090042.

doi: 10.16186/j.cnki.1673-9787.2024090042

Received： 2024-09-23

Revised： 2024-12-24

Online： 2026-05-21

Study on mechanical properties of steel slag cement stabilized soil by different factors (Online)

Tan Bo1,2, Li Lingli1,2, Chen Ping1,2,LYU Yiquan3, Chen Yuanfeng3

1.School of Civil Engineering, Guilin University of Technology, Guilin 541004, Guangxi, China；2.Guangxi Key Laboratory of Green Building Materials and Construction Industrialization，Guilin University of Technology, Guilin 541004, Guangxi, China；3. Guangxi Guitong Engineering Management Group Co., Ltd., Nanning 530000, Guangxi,  China

Abstract: Objectives In order to find a greener and more economical method of reinforcing shoulder soils that can be adapted to various factors such as the construction environment and construction conditions. Methods In this paper, steel slag cement was selected as the material for stabilization soil to study the strength and drying and shrinkage characteristics, and the unconfined compression strength and leakage strength of steel slag cement stabilization soil was studied by considering changing the dosage of steel slag, cement, maintenance conditions, compaction density and the percentage of fines in soil particles, and to explore the effect of steel slag on the drying and shrinking of the soil, and the micro-mechanisms of the consolidated soil ware also analysed by scanning electron microscope (SEM) tests. Results It was found that: The strength of soil body increases with the increase of cement dosage, and with the increase of steel slag doping, the compressive strength and leakage strength of the soil body showed the trend of increasing and then decreasing, and reached the peak value when the doping of steel slag was 10%; compared with the standard curing, the unconfined compression strength of the soil was greatly improved under the ambient temperature and normal humidity curing, and the compression strength of the soil under the different cement doping increased by about 100%; the strength of the soil was improved with the increase of the dosage of fines and the density of soil body; the strength of the soil was improved by the higher cement dosing, and the more significant influence of the density. The strength of the soil increases with the increase of fine grain dosage and density, and the higher the cement dosage, the more significant the effect of density on the compressive strength of the soil body; With the increase of steel slag doping, the water loss rate, dry shrinkage rate and dry shrinkage strain of the material were reduced, and the stability of the soil body was enhanced; in addition, it was found through microanalysis that the steel slag cement stabilization soil was mainly composed of cementitious materials produced by the hydration reaction and some unhydrated steel slag particles to form a denser skeleton to improve the overall performance. Conclusions The results of the study can provide theoretical and experimental support for the construction of reinforced shoulder soil under similar conditions.

Key words: earth shoulder; Industrial steel slag; stable soil; cement; strength effect; scanning electron microscope