Hydraulic Stability of Fly Ash-Bentonite Mixtures in Landfill Containment System

• Autorzy: Budihardjo Mochamad Arief , Syafrudin Syafrudin , Priyambada Ika Bagus , Ramadan Bimastyaji Surya

Identyfikatory

DOI

10.12911/22998993/139064

• Języki publikacji: EN

Abstrakty

EN

This study aimed to examine the performance of fly ash mixed materials with bentonite binder (FAB) as a recent low-cost containment system to withstand leachate infiltration. The mixture of fly ash with clay (bentonite) can increase the strength of stability and strengthen cohesion bonds between molecules. Direct shear, falling head, Atterberg limit and specific gravity test have been conducted as a preliminary study to determine the precise mixture composition of fly ash-bentonite (FAB) landfill liners. Some bentonite composition: 0% (FAB₀), 15% (FAB₁₅), 20% (FAB₂₀), 25% (FAB₂₅) and 25% – cured with NH₄Cl (FAB_25s) for 24 hours, which mixed with fly ash, showed the value of shear stability at normal stress reaching 9.5 kNm^-2, 15.48 kNm^-2, 45.06 kNm^-2, 46.26 kNm^-2 and 13.67 kNm^-2, respectively. It showed that the greater the content of bentonite in the mixture, the higher the shear stress produced. Curing with saline solution can reduce the shear stress of the FAB mixture. The safety test results using Geoslope/W® show that the addition of bentonite will increase bonding between particles, bearing capacity, and shear strength of the material. The largest safety factor of 1.674 obtained from FAB20 material meets the safety standard for short-term slope stability. The use of fly ash material with bentonite is expected to be an alternative landfill liner material.

Słowa kluczowe

EN

stabilization; containment system; bentonite; fly ash; permeability

• Wydawca: Polskie Towarzystwo Inżynierii Ekologicznej ; Lublin University of Technology
• Czasopismo: Journal of Ecological Engineering
• Rocznik: 2021
• Tom: Vol. 22, nr 7
• Strony: 132--141
• Opis fizyczny: Bibliogr. 29 poz., rys., tab.

Twórcy

autor

Budihardjo Mochamad Arief

• Department of Environmental Engineering, Faculty of Engineering, Universitas Diponegoro, Jl. Prof. H. Sudarto, SH Tembalang, Semarang, 50275, Indonesia

• https://orcid.org/0000-0002-1256-3076

autor

Syafrudin Syafrudin

• Department of Environmental Engineering, Faculty of Engineering, Universitas Diponegoro, Jl. Prof. H. Sudarto, SH Tembalang, Semarang, 50275, Indonesia

autor

Priyambada Ika Bagus

• Department of Environmental Engineering, Faculty of Engineering, Universitas Diponegoro, Jl. Prof. H. Sudarto, SH Tembalang, Semarang, 50275, Indonesia

autor

Ramadan Bimastyaji Surya

• Department of Environmental Engineering, Faculty of Engineering, Universitas Diponegoro, Jl. Prof. H. Sudarto, SH Tembalang, Semarang, 50275, Indonesia

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