Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Influence of recycled aggregates on dynamic/static stability of self-consolidating concrete
The effect of recycled concrete aggregate (RCA) on rheology and dynamic/static stability of highly flowable self-consolidating concrete (SCC) is not well quantified. Two series of SCC mixtures containing different RCA replacement levels and proportioned using the direct replacement and Equivalent Mortar Volume methods were considered in this study. Test results have shown that the increase in RCA replacement level leads to reduced rate of flow and passing ability, yet resulted in improved static stability given the greater relative water absorption that reduces the detrimental effects of free mixing water in fresh concrete. The use of four-bladed slotted vane rotating in infinite medium was found particularly useful to mitigate aggregate migration and enhance detection of internal friction resulting from RCA skeleton. Four “rheology boxes” enabling easier development and prediction of concrete stability for given application are proposed with respect to the European Guidelines for SCC.
Influence of recycled aggregates on dynamic/static stability of self-consolidating concrete
The effect of recycled concrete aggregate (RCA) on rheology and dynamic/static stability of highly flowable self-consolidating concrete (SCC) is not well quantified. Two series of SCC mixtures containing different RCA replacement levels and proportioned using the direct replacement and Equivalent Mortar Volume methods were considered in this study. Test results have shown that the increase in RCA replacement level leads to reduced rate of flow and passing ability, yet resulted in improved static stability given the greater relative water absorption that reduces the detrimental effects of free mixing water in fresh concrete. The use of four-bladed slotted vane rotating in infinite medium was found particularly useful to mitigate aggregate migration and enhance detection of internal friction resulting from RCA skeleton. Four “rheology boxes” enabling easier development and prediction of concrete stability for given application are proposed with respect to the European Guidelines for SCC.
Influence of recycled aggregates on dynamic/static stability of self-consolidating concrete
Assaad, Joseph Jean (Autor:in)
Journal of Sustainable Cement-Based Materials ; 6 ; 345-365
02.11.2017
21 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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