Reliability-Based Design Optimization of Biopolymer-Amended Soil as an Alternative Landfill Liner Material

Venkata Vydehi, K. and Moghal, A.A.B. and Basha, B Munwar (2022) Reliability-Based Design Optimization of Biopolymer-Amended Soil as an Alternative Landfill Liner Material. Journal of Hazardous, Toxic, and Radioactive Waste, 26 (3). pp. 1-13. ISSN 2153-5493

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Abstract

This paper presents our findings on the effect of adding biopolymers to locally available soil to form low-cost alternative landfill liner materials. Hydraulic conductivity is the key parameter for assessing the suitability of any geomaterial as a landfill liner. In view of this, the hydraulic conductivity of biopolymer-modified soil was determined at various dosages. Two biopolymers - xanthan gum and guar gum - were used in the experimental work at dosages of 0.5%, 1%, 2%, and 4% by weight of dry soil mass. The results indicated that the hydraulic conductivity values decreased with an increase in biopolymer content and consolidation pressure (σcp). The influence of xanthan gum content (G1) and guar gum content (G2) on the soil hydraulic conductivity is represented by nonlinear regression models based on experimental data obtained for σcps of 50, 100, 200, 400, and 800 kPa. The performance of the soils was assessed using reliability-based design optimization methodology. The optimal mixtures of cohesive soils blended with a range of G1 and G2 were evaluated considering the variability associated with the dosages of G1 and G2, and the σcp. © 2022 American Society of Civil Engineers.

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IITH Creators:

IITH Creators	ORCiD
Basha, B Munwar	https://orcid.org/0000-0003-1417-3650

Item Type:

Article

Additional Information:

This project was financially supported by the National Institute of Technology, Warangal, India, under Research Seed Grant No. P1015 and the Ministry of Education (formerly known as theMinistry of Human Resources and Development), Government of India. The authors would like to thank the reviewers for their constructive comments, which helped improve the original manuscript.

Uncontrolled Keywords:

Biopolymer, Compression index, Consolidation pressure, Hydraulic conductivity, Liner material, Reliability-based design optimization, Swelling index

Subjects:

Civil Engineering

Divisions:

Department of Civil Engineering

Depositing User:

. LibTrainee 2021

Date Deposited:

23 Jun 2022 04:22

Last Modified:

28 Jun 2022 05:04