Tensile strength and dilative characteristics of compacted unsaturated clay-sized metalliferous tailings for bulk earthworks

被引：0

作者：

Tian, Hua ^{[1
]}

Williams, David J. ^{[1
]}

Mandisodza, Keith ^{[1
]}

机构：

[1] Univ Queensland, Geotech Engn Ctr, Sch Civil Engn, Brisbane, QLD 4072, Australia

来源：

BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT | 2024年 / 83卷 / 09期

关键词：

Unsaturated tailings; Tensile strength; Shear strength; Dilatancy; Filter paper test; Fattened Brazilian test; Direct shear test; Soil water characteristics curve (SWCC); SHEAR-STRENGTH; CRITICAL-STATE; EFFECTIVE STRESS; RED MUD; CHARACTERISTIC CURVE; PHYSICAL-PROPERTIES; CAPILLARY FORCES; WATER-RETENTION; SUCTION STRESS; SOIL BEHAVIOR;

D O I：

10.1007/s10064-024-03860-1

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Lack of investigation into the tensile strength characteristics of unsaturated tailings hinders their recycling as construction materials in bulk earthworks. Here, the strength characteristics and strength-dilatancy relation in the tensile stress regime of unsaturated tailings were investigated via flattened Brazilian and direct shear tests. A nonlinear variation of tensile strength with water contents was observed. The unsaturated tailings with water contents below the plastic limit were strain softening and dilative under low normal stress. Furthermore, an analytical equation was proposed to predict the tensile strength of compacted tailings via the soil water characteristics curve (SWCC) and corroborated via experiments.

引用

页数：25