Utilization of Waste Incineration Bottom Ash to Enhance Engineering Properties of Expansive Subgrade Soils

Expansive soils are a type of soil that exhibits the ability to swell and shrink with the variation of moisture content. Lightweight structures such as pavements, sidewalks, and driveways face failures due to the swelling and shrinkage behavior of expansive soils. Therefore, the aim of this study is...

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Bibliographic Details
Published in:Advances in civil engineering 2022-12, Vol.2022 (1)
Main Author: Melese, Damtew Tsige
Format: Article
Language:English
Subjects:
Atterberg limits
Bottom ash
California bearing ratio
Cement
Civil engineering
Coal-fired power plants
Combustion
Compressive strength
Construction
Curing
Design specifications
Electricity distribution
Expansive soils
Incineration
Laboratory tests
Landfill
Medical wastes
Moisture content
Moisture effects
Municipal solid waste
Penetration tests
Soil compaction
Soil improvement
Soil investigations
Soil moisture
Soil properties
Soil shrinkage
Soil stabilization
Soil testing
Soil types
Soils
Specific gravity
Subgrades
Waste disposal
Waste utilization
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Summary:Expansive soils are a type of soil that exhibits the ability to swell and shrink with the variation of moisture content. Lightweight structures such as pavements, sidewalks, and driveways face failures due to the swelling and shrinkage behavior of expansive soils. Therefore, the aim of this study is to investigate the effect of waste incineration bottom ash on the engineering properties of expansive subgrade soils. To investigate the waste incineration bottom ash, tests such as specific gravity, Atterberg limit, free swell test, compaction characteristics, unconfined compression strength, and Californian bearing ratio (CBR) were conducted. The soil was stabilized by waste incineration bottom ash with proportions of 10%, 15%, 20%, 25%, and 30% by dry weight. From the laboratory test results, the soil under this category has poor engineering properties which include high plastic index, high free swell index, low UCS, and low CBR. The performance of soil improved as waste incineration bottom ash content increased with respect to curing time. The curing time of the sample has a significant effect on the performance of the weak subgrade soil.
ISSN:1687-8086
1687-8094
DOI:10.1155/2022/7716921