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A platform for research: civil engineering, architecture and urbanism
Flexural strength enhancement of recycled aggregate concrete beams with steel fibre-reinforced concrete jacket
Highlights Influence of steel fibre jacket on the flexural behaviour of recycled aggregate concrete beams; Lack of suitable model to predict the bending performance of strengthened recycled concrete beams with concrete jacket; Development of a new model to forecast the flexural resistance of jacketed RC beams with steel fibres concrete jacket.
Abstract In this study, the effect of steel fibres reinforced concrete (SFRC) jacketing on the flexural performance of coarse recycled aggregate reinforced concrete (CRARC) beams is studied. A total of 48 reinforced concrete beams, in two categories, were manufactured and tested. In the first category, 16 reinforced concrete (RC) beams were tested, then strengthened with a jacket and tested again. In another category, 16 specimens were strengthened with a jacket and then tested. All specimens were tested using a four-point flexural setup. Coarse recycled aggregate (CRA) was used at two mass replacement ratios, 0% and 100%, in both RC beams and concrete jackets (CJs). Steel fibres (SF) was also added at 0% and 2% (by volume) in both beams and CJs. In these tests, the flexural capacity, maximum displacement at mid-span and the ductility of specimens were measured. Moreover, a new modified model was proposed to predict the flexural behaviour of SF jacketed CRA and coarse natural aggregate (CNA) beams. The obtained outcomes indicate that the maximum flexural strength and displacement of 100% CRARC beams increased substantially by strengthening RC with 2% SF reinforced CJs.
Flexural strength enhancement of recycled aggregate concrete beams with steel fibre-reinforced concrete jacket
Highlights Influence of steel fibre jacket on the flexural behaviour of recycled aggregate concrete beams; Lack of suitable model to predict the bending performance of strengthened recycled concrete beams with concrete jacket; Development of a new model to forecast the flexural resistance of jacketed RC beams with steel fibres concrete jacket.
Abstract In this study, the effect of steel fibres reinforced concrete (SFRC) jacketing on the flexural performance of coarse recycled aggregate reinforced concrete (CRARC) beams is studied. A total of 48 reinforced concrete beams, in two categories, were manufactured and tested. In the first category, 16 reinforced concrete (RC) beams were tested, then strengthened with a jacket and tested again. In another category, 16 specimens were strengthened with a jacket and then tested. All specimens were tested using a four-point flexural setup. Coarse recycled aggregate (CRA) was used at two mass replacement ratios, 0% and 100%, in both RC beams and concrete jackets (CJs). Steel fibres (SF) was also added at 0% and 2% (by volume) in both beams and CJs. In these tests, the flexural capacity, maximum displacement at mid-span and the ductility of specimens were measured. Moreover, a new modified model was proposed to predict the flexural behaviour of SF jacketed CRA and coarse natural aggregate (CNA) beams. The obtained outcomes indicate that the maximum flexural strength and displacement of 100% CRARC beams increased substantially by strengthening RC with 2% SF reinforced CJs.
Flexural strength enhancement of recycled aggregate concrete beams with steel fibre-reinforced concrete jacket
Ghalehnovi, Mansour (author) / Karimipour, Arash (author) / Anvari, Ali (author) / de Brito, Jorge (author)
Engineering Structures ; 240
2021-04-01
Article (Journal)
Electronic Resource
English
Concrete jacket , Flexural behaviour , Recycled aggregate , Reinforced concrete beams , Steel fibres , Strengthening , CJs , concrete jackets , CNA , coarse natural aggregate , CRA , coarse recycled aggregate , CRARC , coarse recycled aggregate reinforced concrete , DR , ductility ratio , NA , natural aggregates , NWC , normal weight concrete , PET , polyethylene terephthalate , RA , recycled aggregate , RC , reinforced concrete , RCA , recycled concrete aggregate , SF , steel fibres , SFRC , steel fibres reinforced concrete , TR , transverse reinforcement
Flexural performance of reinforced recycled aggregate concrete beams
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Flexural performance of reinforced concrete beams made with recycled concrete coarse aggregate
| BASE | 2018