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A platform for research: civil engineering, architecture and urbanism
Roller compacted concrete-tensile strength of horizontal joints
Abstract Roller Compacted Concrete is a very dry material consolidated by the use of a powerful external vibatory compaction. This material is used mainly in gravity or arch/gravity dams, and pavements. RCC dam construction methodology, by concrete layers, involves a high number and an extensive area of horizontal joints. These joints are the weakest parts of RCC in terms of strength and permeability, being one hindrance to more widespread use of RCC. This study analyses the influence of different parameters on the direct tensile strength of the joints, namely the relative humidity in the concrete surface, the setting and hardening state of concrete, and the cold joint treatment. The results obtained indicated that the decrease in the joint quality with the time of exposure is continuous being important the compaction of the upper layer before the initial setting time of the lower layer. Cold joint treatments should expose aggregate particles.
Roller compacted concrete-tensile strength of horizontal joints
Abstract Roller Compacted Concrete is a very dry material consolidated by the use of a powerful external vibatory compaction. This material is used mainly in gravity or arch/gravity dams, and pavements. RCC dam construction methodology, by concrete layers, involves a high number and an extensive area of horizontal joints. These joints are the weakest parts of RCC in terms of strength and permeability, being one hindrance to more widespread use of RCC. This study analyses the influence of different parameters on the direct tensile strength of the joints, namely the relative humidity in the concrete surface, the setting and hardening state of concrete, and the cold joint treatment. The results obtained indicated that the decrease in the joint quality with the time of exposure is continuous being important the compaction of the upper layer before the initial setting time of the lower layer. Cold joint treatments should expose aggregate particles.
Roller compacted concrete-tensile strength of horizontal joints
Bettencourt Ribeiro, A. C. (author) / Díez-Cascón, J. (author) / Gonçalves, A. F. (author)
2001
Article (Journal)
English
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