A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Combined Effect of Expansive Cement and Internal Curing to Mitigate Shrinkage Cracking in Bridge Decks
Concrete cracking due to restrained drying shrinkage is a widespread problem that could happen to any structural element including bridge decks. One of the main causes of bridge deck cracking is the development of tensile stresses due to restrained drying shrinkage. Cracks allow harmful substances such as water and deicing salts to penetrate the deck and initiate corrosion. This research investigates the effects of using lightweight aggregate (LWA) on enhancing the performance of expansive Type-K cement. Four large-scale bridge decks of 2 m×3 m were built using four different types of concrete mixtures: (1) a mixture containing 100% Portland cement, (2) a mixture incorporating expansive Type-K cement, (3) a mixture containing internally cured fine lightweight aggregate (LWA), and (4) a combined mixture of Type-K cement and internally cured LWA. The combined mixture uses internal water from LWA to enhance the expansion of Type-K cement and produce compressive stress in the concrete; and eventually reduces the onset of cracking.
Combined Effect of Expansive Cement and Internal Curing to Mitigate Shrinkage Cracking in Bridge Decks
Concrete cracking due to restrained drying shrinkage is a widespread problem that could happen to any structural element including bridge decks. One of the main causes of bridge deck cracking is the development of tensile stresses due to restrained drying shrinkage. Cracks allow harmful substances such as water and deicing salts to penetrate the deck and initiate corrosion. This research investigates the effects of using lightweight aggregate (LWA) on enhancing the performance of expansive Type-K cement. Four large-scale bridge decks of 2 m×3 m were built using four different types of concrete mixtures: (1) a mixture containing 100% Portland cement, (2) a mixture incorporating expansive Type-K cement, (3) a mixture containing internally cured fine lightweight aggregate (LWA), and (4) a combined mixture of Type-K cement and internally cured LWA. The combined mixture uses internal water from LWA to enhance the expansion of Type-K cement and produce compressive stress in the concrete; and eventually reduces the onset of cracking.
Combined Effect of Expansive Cement and Internal Curing to Mitigate Shrinkage Cracking in Bridge Decks
Rahman, Mohammad (author) / Gonzalez, Dorys (author) / Hindi, Riyadh (author)
Structures Congress 2019 ; 2019 ; Orlando, Florida
Structures Congress 2019 ; 50-56
2019-04-22
Conference paper
Electronic Resource
English
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