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- Title
Enhancing the Characteristics of Gypsum Soil by Adding Hydrated Lime and Cement.
- Authors
Hasan, Naser A.; Ahmed, Hassan Ali; Hussein, Israa S.
- Abstract
Gypsum soil is highly vulnerable to moisture and water, which can cause disastrous and severe damage. Hence, the effect of adding cement and hydrated lime on the collapse and mechanical properties of the components was examined upon being exposed to water. Cement and hydrated lime are widely used to improve the geotechnical properties of problematic soils due to their cheap price and local availability. The gypsum soil samples were mixed with cement and hydrated lime in proportions of 4%, 8%, and 12%, proportional to the dry weight of the soil. The resulting mixtures were cured for 7 days and tested to evaluate their collapse behavior and shear strength parameters properties. The results showed that the addition process enhanced soil properties, reduced collapse, increased cohesion, and increased internal friction angle. The collapse of the gypsum soil decreased by 55.91%, 83.3%, and 92% for soil treated by cement, while it decreased by 47.1%, 76.82%, and 90% for soil treated with lime when the soil treated by 4%, 8% and 12% of additive, respectively. The direct shear tests showed a significant increase in the cohesion of gypsum soil after adding cement. The cohesion of the soil increased by 33.5%, 90%, and 86.5%, for soil treated by cement, while it decreased by 28%, 59%, and 65% for soil treated by lime when the soil treated by 4%, 8% and 12% of additive, respectively. The angle of internal friction rose 2.1%, 8.4%, and 18.7% for soil treated with cement and 1%, 6%, and 5.2% for soil treated with lime when the soil was treated with additive concentrations of 4%, 8%, and 12%, respectively. The ideal proportion of additions ranged from 8% to 12%, and the inclusion of cement proved to be more efficient than lime in enhancing the engineering characteristics of the gypsum soils.
- Subjects
GYPSUM in soils; LIME (Minerals); SOIL cohesion; GYPSUM; SOIL cement; CEMENT
- Publication
Journal of Composite & Advanced Materials / Revue des Composites et des Matériaux Avancés, 2024, Vol 34, Issue 2, p207
- ISSN
1169-7954
- Publication type
Article
- DOI
10.18280/rcma.340210