Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Review of Use of Asphaltic Concrete Core in Earthen/Rock Fill Embankment Dam
Clay core has been conventionally used as impervious layer in embankment dams for many years. However, for more than last 50 years, the lack of clay borrow sources near dam site, along with a high annual precipitation rate in the area, led construction engineers to replace the clay core with an asphalt concrete core (ACC) for the construction of the embankment dams. Germany is a pioneer in this technology. Most asphalt-core dams have been built in Europe, but China has also built and is currently building several dams of this type. The use of asphalt concrete core has some additional benefits, like low permeability (10–7 to 10–9 cm/sec) which allow perfect water tightness, sufficient resistance to loading forces, sufficient flexibility to adjust differential settlement/deformation of the embankment without cracks, resistance to aging, a good self-healing capacity in the case of small leakage combined with resistance to erosion and a good contact between the asphaltic concrete and materials of the embankment. Impounding during construction is possible in asphaltic concrete core, as a result potential seasonal rainwater can be collected prior to full completion of the works. The asphaltic construction materials are insoluble in water, environmentally compatible and have been proven to be non-harmful to drinking water sources. In order to analyses the stability, deformability and impervious characteristics of the asphaltic concrete core mix different tests are carried out. An attempt was made to study the practices followed for the construction of the asphalt concrete core embankment dam in the world. The paper presents the studies carried out on ACC, the characteristics of asphaltic concrete core, design principle, construction methodology, quality control aspects, and its comparison with clay core.
Review of Use of Asphaltic Concrete Core in Earthen/Rock Fill Embankment Dam
Clay core has been conventionally used as impervious layer in embankment dams for many years. However, for more than last 50 years, the lack of clay borrow sources near dam site, along with a high annual precipitation rate in the area, led construction engineers to replace the clay core with an asphalt concrete core (ACC) for the construction of the embankment dams. Germany is a pioneer in this technology. Most asphalt-core dams have been built in Europe, but China has also built and is currently building several dams of this type. The use of asphalt concrete core has some additional benefits, like low permeability (10–7 to 10–9 cm/sec) which allow perfect water tightness, sufficient resistance to loading forces, sufficient flexibility to adjust differential settlement/deformation of the embankment without cracks, resistance to aging, a good self-healing capacity in the case of small leakage combined with resistance to erosion and a good contact between the asphaltic concrete and materials of the embankment. Impounding during construction is possible in asphaltic concrete core, as a result potential seasonal rainwater can be collected prior to full completion of the works. The asphaltic construction materials are insoluble in water, environmentally compatible and have been proven to be non-harmful to drinking water sources. In order to analyses the stability, deformability and impervious characteristics of the asphaltic concrete core mix different tests are carried out. An attempt was made to study the practices followed for the construction of the asphalt concrete core embankment dam in the world. The paper presents the studies carried out on ACC, the characteristics of asphaltic concrete core, design principle, construction methodology, quality control aspects, and its comparison with clay core.
Review of Use of Asphaltic Concrete Core in Earthen/Rock Fill Embankment Dam
Lecture Notes in Civil Engineering
Muthukkumaran, Kasinathan (Herausgeber:in) / Umashankar, Balunaini (Herausgeber:in) / Pitchumani, N. Kumar (Herausgeber:in) / Roy, Satyajit (Autor:in) / Jain, V. K. (Autor:in) / Gupta, Manish (Autor:in) / Chitra, R. (Autor:in)
Indian Geotechnical Conference ; 2021 ; Trichy, India
15.02.2023
13 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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