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A platform for research: civil engineering, architecture and urbanism
Shrinkage and cracking studies of high performance concrete for bridge decks
Highlights ► Evaluated cracking and shrinkage of high-performance concrete (HPC) bridge decks. ► Compared the cracking performance of HPC produced with different materials. ► Correlated strength, shrinkage, modulus of elasticity with cracking onset days. ► Recommended threshold limit to mitigate cracking by comparing with sound bridges.
Abstract Restrained shrinkage cracking is a critical issue that raises the concern of widespread use of high-performance concrete (HPC) in bridge deck. Present studies were undertaken to compare the different HPC and propose concept to use local field data to define a threshold for cracking potential. We developed 18 HPC mixtures, suitable for bridge decks in shrinkage-prone locations, using supplementary cementitious materials – fly ash, slag, silica fume, and metakaolin; and local aggregates with three different w/cm: 0.40, 0.35, and 0.30. Basic properties as well as shrinkage and cracking properties were evaluated. In addition to comparing among HPC performance, a correlation was made between commonly measured parameters such as strength, shrinkage, and modulus of elasticity with cracking onset obtained from ring tests. Finally, field data from no-crack and well performing bridges were used to define a threshold safe limit. This concept can be used for design of HPC mixtures to reduce cracking potential from materials point of view for any other locations.
Shrinkage and cracking studies of high performance concrete for bridge decks
Highlights ► Evaluated cracking and shrinkage of high-performance concrete (HPC) bridge decks. ► Compared the cracking performance of HPC produced with different materials. ► Correlated strength, shrinkage, modulus of elasticity with cracking onset days. ► Recommended threshold limit to mitigate cracking by comparing with sound bridges.
Abstract Restrained shrinkage cracking is a critical issue that raises the concern of widespread use of high-performance concrete (HPC) in bridge deck. Present studies were undertaken to compare the different HPC and propose concept to use local field data to define a threshold for cracking potential. We developed 18 HPC mixtures, suitable for bridge decks in shrinkage-prone locations, using supplementary cementitious materials – fly ash, slag, silica fume, and metakaolin; and local aggregates with three different w/cm: 0.40, 0.35, and 0.30. Basic properties as well as shrinkage and cracking properties were evaluated. In addition to comparing among HPC performance, a correlation was made between commonly measured parameters such as strength, shrinkage, and modulus of elasticity with cracking onset obtained from ring tests. Finally, field data from no-crack and well performing bridges were used to define a threshold safe limit. This concept can be used for design of HPC mixtures to reduce cracking potential from materials point of view for any other locations.
Shrinkage and cracking studies of high performance concrete for bridge decks
Ray, Indrajit (author) / Gong, Zhiguo (author) / Davalos, Julio F. (author) / Kar, Arkamitra (author)
Construction and Building Materials ; 28 ; 244-254
2011-08-18
11 pages
Article (Journal)
Electronic Resource
English
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