Optimum Fly Ash Content to Improve the Geotechnical Properties of Expansive Soil
Publication: Geo-Congress 2024
ABSTRACT
Expansive soils pose a serious challenge to civil engineering constructions due to their ability to swell and shrink upon wetting and drying. This phenomenon usually leads to damage of the structure when the soil is not treated properly. Moreover, the disposal and utilization of fly ash (FA) in both economical and eco-friendly ways has received high attention in the world. Thus, this study focuses on the improvement of the geotechnical properties of expansive soils stabilized with varying percentages of fly ash as an admixture. In the present study, low calcium fly ash in different proportions by weight (0%, 10%, 20%, 30%, and 40%) was added to a moderately expansive soil collected from Doharramafi Village, India. Laboratory tests performed on the prepared mixtures included the determination of moisture-density relationships, California bearing ratio (CBR), and shear strength parameters. Test results show that moisture-density relationships, CBR values, and shear strength parameters of fly ash-treated soil are significantly modified and improved compared to control specimens. Furthermore, based on all laboratory tests, 30% fly ash content is observed to be the optimum fly ash quantity required to improve the geotechnical properties of soil stabilized with fly ash.
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Information & Authors
Information
Published In
Geo-Congress 2024
Pages: 30 - 39
History
Published online: Feb 22, 2024
ASCE Technical Topics:
- Ashes
- Construction engineering
- Engineering materials (by type)
- Expansive soils
- Fine-grained soils
- Fly ash
- Geomechanics
- Geotechnical engineering
- Geotechnical investigation
- Material mechanics
- Material properties
- Materials engineering
- Penetration tests
- Shear strength
- Soil dynamics
- Soil mechanics
- Soil properties
- Soil stabilization
- Soils (by type)
- Strength of materials
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