Experimental study on shear strength characteristics of mud construction waste lightweight soil

Abstract

Mud construction waste lightweight soil (MCWLS) is made by dredged mud, lightweight construction waste (LCW), cement. Consolidated-drained (CD) shear tests were conducted to investigate the shear characteristics of MCWLS. The stress-strain relationships were divided into three types: strain-hardening, strain-softening and ideal elastic-plastic. A straight line was presented as the failure envelope. The cohesion and internal friction angle were first increased then decreased with the increase of LCW content, the peak value corresponding to LCW content of 50%. Failure modes showed the drum type and contraction type. A new bi-exponential expression model was proposed to describe the three stress-strain curves simultaneously.

Keywords:

• Lightweight soil
• CD test
• stress-strain relationship
• strength mechanism
• bi-exponential expression model

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was supported by the National Science Foundation of China under Grant No. 51809101, Qinglan Project of Jiangsu Higher Education Institutions, and Jiangsu State Grid Science and Technology Project under Grant No. J2019113.