Effects of leachate on geotechnical characteristics of sandy clay soil

Leachate is a hazardous liquid that poses negative impacts if leaks out into environments such as soil and ground water systems. The impact of leachate on the downgraded quality in terms of chemical characteristic is more concern rather than the physical or mechanical aspect. The effect of leachate...

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Bibliographic Details
Main Authors: Harun, N S, Rahman, Ali Z, Rahim, A S, Lihan, T, Idris R M W
Format: Conference Proceeding
Language:English
Subjects:
Clay minerals
Clay soils
Dry density
Field strength
Geotechnical engineering
Groundwater
Kaolinite
Leachates
Mechanical properties
Mica
Moisture content
Muscovite
Organic chemistry
Plastic limit
Residual soils
Shear strength
Soil compaction
Soil contamination
Soil investigations
Soil mechanics
Soil moisture
Soil strength
Soil water
Specific gravity
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Summary:Leachate is a hazardous liquid that poses negative impacts if leaks out into environments such as soil and ground water systems. The impact of leachate on the downgraded quality in terms of chemical characteristic is more concern rather than the physical or mechanical aspect. The effect of leachate on mechanical behaviour of contaminated soil is not well established and should be investigated. This paper presents the preliminary results of the effects of leachate on the Atterberg limit, compaction and shear strength of leachate-contaminated soil. The contaminated soil samples were prepared by mixing the leachate at ratiosbetween 0% and 20% leachate contents with soil samples. Base soil used was residual soil originated from granitic rock and classified as sandy clay soil (CS). Its specific gravity ranged between 2.5 and 2.64 with clay minerals of kaolinite, muscovite and quartz. The field strength of the studied soil ranged between 156 and 207 kN/m2. The effects of leachate on the Atterberg limit clearly indicated by the decrease in liquid and plastic limit values with the increase in the leachate content. Compaction tests on leachate-contaminated soil caused the dropped in maximum dry density, ρdry and increased in optimum moisture content, wopt when the amount of leachate was increased between 0% and 20%. The results suggested that leachate contamination capable to modify some geotechnical properties of the studied residual soils.
ISSN:0094-243X
1551-7616