Performance of different percentage on nano-kaolin as additives in soil liner application

Mukri, Mazidah; Zainuddni, Atiqah N.; Abdullah, Nur Athirah; Ibrahim, Norizzati

doi:10.1016/j.matpr.2018.07.009

Cited by 3 publications

(1 citation statement)

References 13 publications

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“…Liner system is a semi-permeable layer that functions to prevent the occurrence of pollutant diffusion and resist leachate infiltration into the soil (Alla et al, 2017). Landfill waterproof layers generally consist of the materials that have low permeability to minimize pollutant infiltration (Mukri et al, 2018). Various types of minerals are often used as a waterproof liner model because of the low permeability coefficient, including bentonite (Ruiz et al, 2012), kaolinite (Vimonses et al, 2009), and montmorillonite (Çoruh and Ergun, 2010).…”

Section: Introductionmentioning

confidence: 99%

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

Budihardjo¹,

Syafrudin²,

Priyambada³

et al. 2021

J. Ecol. Eng.

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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% (FAB 0 ), 15% (FAB 15 ), 20% (FAB 20 ), 25% (FAB 25 ) and 25% -cured with NH 4 Cl (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.

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