谭波,李伶俐,陈平,等.不同因素对钢渣水泥稳定土力学性能的研究[J].河南理工大学学报(自然科学版)，doi:10.16186/j.cnki.1673-9787.2024090042.

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.

不同因素对钢渣水泥稳定土力学性能的研究

(网络首发)

谭波1,2，李伶俐1,2，陈平1,2，吕益权3，陈源锋3

1.桂林理工大学 土木工程学院,广西 桂林 541004；2.桂林理工大学 广西绿色建材与建筑工业化重点实验室,广西 桂林 541004；3.广西桂通工程管理集团有限公司,广西 南宁 530000

摘要: 目的 为寻找一种较为绿色经济的方法来加固路肩土，且能适应施工环境和施工条件等各种因素的影响。方法 本文选用钢渣水泥作为稳定土的材料，以强度和干缩特性为研究对象，并考虑改变钢渣、水泥的掺量、养护条件、压实密度和土颗粒中细粒占比对钢渣水泥稳定土的无侧限抗压强度和劈裂强度进行研究，探寻钢渣对土体干缩的影响，同时还通过扫描电子显微镜(SEM)试验对固化土的微观机理进行分析。结果 研究发现：土体强度随着水泥掺量的增加而增加，随着钢渣掺量的增加，土体的抗压强度与劈裂强度均呈现先增加后减小的趋势，并在钢渣掺量为10%时达到峰值；相较于标准养护，常温常湿养护下土体的无侧限抗压强度大幅提升，不同水泥掺量下的抗压强度均提高了100%左右；土体的强度随着细粒掺量和密度的增加而有所提高，水泥掺量越高，土体的抗压强度受密度的影响也越显著；随着钢渣掺量的增加，材料的失水率、干缩率和干缩应变都随之降低，土体的稳定性有所增强；另外，通过微观分析发现钢渣水泥稳定土主要是由水化反应产生的胶凝材料与一些未水化的钢渣颗粒形成较为密实的骨架来提升整体的性能。结论 研究结果可为类似条件下加固路肩土的施工提供理论和试验支撑。

关键词:土路肩；工业钢渣；稳定土；水泥；强度影响；扫描电镜

doi: 10.16186/j.cnki.1673-9787.2024090042

基金项目:国家自然科学基金资助项目（52062009）；广西重点研发计划（桂科AB23026071）

收稿日期：2024-09-23

修回日期：2024-12-24

网络首发日期：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