Bond between steel reinforcement bars and Electric Arc Furnace slag concrete |
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Authors: | Flora Faleschini Amaia Santamaria Mariano Angelo Zanini José-Tomás San José Carlo Pellegrino |
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Affiliation: | 1.Department of Civil, Environmental and Architectural Engineering,University of Padova,Padua,Italy;2.Mining, Metallurgical and Materials Science Department,University of Basque Country,Bilbao,Spain |
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Abstract: | This paper deals with the bond between steel reinforcement and recycled aggregate concrete, including Electric arc furnace (EAF) slag as full replacement of natural coarse aggregates. Pull-out tests were carried out according to RILEM standard on specimens made with six concrete mixtures, characterized by different w/c ratios and types of aggregates. Plain and ribbed steel reinforcement bars were used to observe the influence of steel roughness. Experimental bond-slip relationships were analyzed, and results show similar bond mechanisms between the reference and EAF concrete specimens. Significant bond strength enhancement is observed in concretes with low w/c ratio, when EAF slag is used as recycled coarse aggregate. Experimental results in terms of bond strength were also compared to analytical predictions, obtained with empirical formulations. |
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