Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Large-scale testing of shrinkage mitigating concrete
Early-age cracking on concrete bridge decks is a major concern because it leads to premature deterioration of bridges. This study experimentally investigates the effects of restrained drying shrinkage on bridge decks using three 2 × 3 m experimental concrete slabs designed to simulate a portion of a bridge deck. The large-scale experimental bridge slabs used in this study were designed to closely replicate the restraint found in the field. Three different concrete mixtures are evaluated including (1) a mixture containing 100% portland cement, (2) a mixture incorporating Type-K cement, and (3) a mixture containing partially saturated lightweight fine aggregate to promote internal curing. As expected, the deck-containing Type-K cement had the highest initial expansion, but the internally cured concrete deck exhibited less shrinkage compared to both the control and the Type-K mixtures and adequately reduced the onset of cracking owing to restrained drying shrinkage.
Large-scale testing of shrinkage mitigating concrete
Early-age cracking on concrete bridge decks is a major concern because it leads to premature deterioration of bridges. This study experimentally investigates the effects of restrained drying shrinkage on bridge decks using three 2 × 3 m experimental concrete slabs designed to simulate a portion of a bridge deck. The large-scale experimental bridge slabs used in this study were designed to closely replicate the restraint found in the field. Three different concrete mixtures are evaluated including (1) a mixture containing 100% portland cement, (2) a mixture incorporating Type-K cement, and (3) a mixture containing partially saturated lightweight fine aggregate to promote internal curing. As expected, the deck-containing Type-K cement had the highest initial expansion, but the internally cured concrete deck exhibited less shrinkage compared to both the control and the Type-K mixtures and adequately reduced the onset of cracking owing to restrained drying shrinkage.
Large-scale testing of shrinkage mitigating concrete
Rahman, Mohammad (Autor:in) / Chen, Ying (Autor:in) / Lindquist, Will (Autor:in) / Ibrahim, Ahmed (Autor:in) / Tobias, Daniel (Autor:in) / Krstulovich, James (Autor:in) / Hindi, Riyadh (Autor:in)
Journal of Sustainable Cement-Based Materials ; 8 ; 39-54
02.01.2019
16 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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