Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Elastic and Shear Moduli of Over Consolidated Lime Stabilized Clayey Soil
The clay core is an essential element in any Rockfill earth dam. It acts as an impermeable barrier minimizing the seepage and provides the water tightness of the dam. Usually, constructing an impermeable clay core requires a substantial quantity of clayey soil. The material of the clay core in a dam is required to have adequate shear strength as well as low compressibility and hydraulic conductivity values. There may be situations where the required quantity of clayey soil having desired mechanical and hydraulic properties is not readily available in the vicinity and those that are available may not marginally meet such properties. However, there are many methods to improve the engineering properties of a soil which does not meet the desirable properties. This research focuses on investigating on the effects of such improvement on the elastic deformation of dam clay core. For this purpose, hydrated lime was selected as the cementitious material to stabilize a clayey soil obtained from Matale District, Sri Lanka. Laboratory experiments were carried out to determine the optimum lime content of the soil based on reaching a pH value of 12.4, which was found to be 5%. Drained triaxial tests were performed at natural moisture content to obtain the elastic properties on remolded lime stabilized samples compacted to 100% Standard Proctor Density at curing periods of 3 days, 14 days and 56 days and prepared at over consolidation ratios of 2, 4 and 6. It was observed in this study that the Elastic and Shear moduli of lime treated candidate soil increased with the curing period. They are further increased by reducing the over consolidation ratio.
Elastic and Shear Moduli of Over Consolidated Lime Stabilized Clayey Soil
The clay core is an essential element in any Rockfill earth dam. It acts as an impermeable barrier minimizing the seepage and provides the water tightness of the dam. Usually, constructing an impermeable clay core requires a substantial quantity of clayey soil. The material of the clay core in a dam is required to have adequate shear strength as well as low compressibility and hydraulic conductivity values. There may be situations where the required quantity of clayey soil having desired mechanical and hydraulic properties is not readily available in the vicinity and those that are available may not marginally meet such properties. However, there are many methods to improve the engineering properties of a soil which does not meet the desirable properties. This research focuses on investigating on the effects of such improvement on the elastic deformation of dam clay core. For this purpose, hydrated lime was selected as the cementitious material to stabilize a clayey soil obtained from Matale District, Sri Lanka. Laboratory experiments were carried out to determine the optimum lime content of the soil based on reaching a pH value of 12.4, which was found to be 5%. Drained triaxial tests were performed at natural moisture content to obtain the elastic properties on remolded lime stabilized samples compacted to 100% Standard Proctor Density at curing periods of 3 days, 14 days and 56 days and prepared at over consolidation ratios of 2, 4 and 6. It was observed in this study that the Elastic and Shear moduli of lime treated candidate soil increased with the curing period. They are further increased by reducing the over consolidation ratio.
Elastic and Shear Moduli of Over Consolidated Lime Stabilized Clayey Soil
Lecture Notes in Civil Engineering
Dissanayake, Ranjith (Herausgeber:in) / Mendis, Priyan (Herausgeber:in) / Weerasekera, Kolita (Herausgeber:in) / De Silva, Sudhira (Herausgeber:in) / Fernando, Shiromal (Herausgeber:in) / Konthesingha, Chaminda (Herausgeber:in) / De Silva, H. S. U. (Autor:in) / Amarasekara, D. S. P. (Autor:in) / Kurukulasuriya, L. C. (Autor:in)
12th International Conference on Structural Engineering and Construction Management ; Kapitel: 23 ; 315-324
29.09.2022
10 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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