Work

Hydro-chemical influence on soil-water characteristic behavior of laterite-bentonite mixture

Year: 2024

Type: article

Abstract: This study investigates the suction characteristics of a laterite-bentonite mixture intended for use as a soil cover system for landfill liners and cutoff walls. It examines the impact of varying dry densities (1.5g/ c m 3 ,1.6g/ c m 3 ) and bentonite content (3 %,5 %,7 %) on suction, comparing the influence of distilled water and chemicals ( N a C l , C a C l 2 ) on the mixture's physical and microstructural properties. The findings demonstrate that the bentonite-laterite mixes suction properties at higher densities with initial water, reducing soil mechanical strength. The research also highlights the influence of chemicals within a small suction range and the substantial impact of dry densities. Additionally, the study shows how certain chemicals and flocculation behaviour affect the suction values by depicting the change in microstructure due to different chemical effects. With WP4C & SEM results, it is observed that higher water content values do not alter suction, irrespective of bentonite percentage and maximum dry density.

Source: Results in Engineering

DOI: 10.1016/j.rineng.2024.103698

Authors: Haroon Ahmed, Ke-Neng Zhang, Kao-fei Zhu, Muhammad Ishfaque

Institutions: Central South University, École nationale des ponts et chaussées, Laboratoire Navier, Hohai University

Language: English

Topic: Soil and Unsaturated Flow

Subfield: Civil and Structural Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,490

Funders: National Natural Science Foundation of China, Central South University, China Scholarship Council