摘要
中国东北和西北季冻区广泛分布分散土,其抗侵蚀、抗剪和抗渗性差,工程稳定性低,在冻融循环、干湿交替下易破坏。针对此,文中聚焦黄原胶与木质素磺酸钙对分散土强度的改良。经直剪和SEM试验发现,随二者掺量变化,改性土力学性能增强,木质素磺酸钙对强度提升作用显著。当黄原胶掺量5%、木质素磺酸钙掺量1%时,复合改性土改良效果最佳,抗剪强度等指标达峰值。SEM分析表明,二者协同使土体孔隙降低、胶结物增多,土颗粒聚集成致密结构,增强咬合力与黏聚力,从而提升土体强度和稳定性。
Dispersed soil is widely distributed in the seasonal frozen regions of Northeast and Northwest China.It has poor erosion resistance,shear resistance,and impermeability,as well as low engineering stability,and is prone to damage under freeze-thaw cycles and dry-wet alternations.This study focuses on the improvement of the strength of dispersed soil by xanthan gum and calcium lignosulfonate.Through direct shear and SEM(Scanning Electron Microscopy)tests,it is found that with the change of the dosages of the two substances,the mechanical properties of the modified soil are enhanced,and calcium lignosulfonate has a significant effect on the strength improvement.When the dosage of xanthan gum is 5%and the dosage of calcium lignosulfonate is 1%,the composite modified soil has the best improvement effect,and the indica-tors such as shear strength reach the peak values.The SEM analysis shows that the synergistic effect of the two substances reduces the pores of the soil,increases the amount of cementitious materials,makes the soil particles aggregate into a dense structure,enhances the bite force and cohesion,and improves the strength and stability of the soil.
作者
郭佳慧
米博阳
王奕琛
王辉鑫
王帅
Guo Jiahui;Mi Boyang;Wang Yichen;Wang Huixin;Wang Shuai(School of Civil Engineering and Transportation,NEFU,Harbin Heilongjiang 150040,China)
出处
《山西建筑》
2026年第2期16-20,共5页
Shanxi Architecture
基金
东北林业大学大学生创新训练项目(项目编号:202410225532)。
关键词
黄原胶
木质素磺酸钙
分散土
抗剪强度
微观孔隙结构
xanthan gum
calcium lignosulfonate
dispersed soil
shear strength
microscopic pore structure
