Effects of recycled concrete aggregate on the fresh properties of self-consolidating concrete

• Autorzy: Safiuddin M. D. , Salam M. A. , Jumaat M. Z.

Warianty tytułu

PL

Wpływ kruszywa uzyskanego z recyklingu betonu na właściwości świeżego betonu samozagęszczalnego

• Języki publikacji: EN

Abstrakty

EN

Concrete wastes are generally delivered to the landfill sites for disposal. Due to increasing charges of landfill and scarcity of natural coarse aggregate (NCA), recycled concrete aggregate (RCA) derived from concrete wastes is growing interest in construction industry. In the present study, RCA was used as partial and full re-placements of NCA to produce self-consolidating concrete (SCC). Different SCC mixes were produced with RCA substituting 0%, 30%, 50%, 70%, and 100% NCA by weight. The water to cement (W/C) ratio and high-range water reducer (HRWR) dosage were kept the same for all concretes. The effects of RCA on the key fresh properties such as filling ability, passing ability, and segregation resistance of SCC were investigated. The test results revealed that the filling ability and passing ability of SCC were improved for 30% and 50% RCA. The SCC mixes with 30% and 50% RCA also possessed adequate segregation resistance. In addition, strong correla-tions were observed for filling ability, passing ability, and segregation resistance. The overall test results suggest that RCA can be used to produce SCC substituting up to 50% NCA without affecting the key fresh properties of concrete.

PL

Odpady betonowa są dostarczane zazwyczaj na składowiska odpadów w celu utylizacji. Ze względu na rosnące koszty składowania, a zarazem niedostatek naturalnego kruszywa grubego (NCA), kruszywowa uzyskane z recyklingu betonu (RCA) i pochodzące z odpadów betonowych zyskuje coraz większe zainteresowanie w branży budowlanej. W niniejszej pracy analizowane jest wykorzystanie RCA w postaci częściowego jaki i pełnego zastąpienie kruszywa NCA do produkcji betonu samozagęszczalnego (SCC). W pracy przeanalizowano wpływ RCA na kluczowe właściwości świeżego betonu SCC. Ogólne wyniki badań wskazują, że RCA może być użyty do produkcji SCC przy zastąpieniu przez niego do 50% NCA bez wpływu na kluczowe właściwości świeżego betonu.

Słowa kluczowe

EN

filling ability; passing ability; recycled concrete aggregate; segregation resistance

PL

odporność na segregację; beton; recykling betonu; beton samozagęszczalny; odpady betonowe

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2011
• Tom: Vol. 11, no 4
• Strony: 1023--1041
• Opis fizyczny: BIbliogr. 28 poz., tab., wykr.

Twórcy

autor

Safiuddin M. D.

autor

Salam M. A.

autor

Jumaat M. Z.

• Department of Civil and Environmental Engineering, Faculty of Engineering, University of Waterloo, 200 University Avenue West, Waterloo, Ontario, Canada N2L 3G1

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