TY - JOUR
T1 - Tension stiffening approach for interface characterization in recycled aggregate concrete
AU - Santana Rangel, Caroline
AU - Amario, Mayara
AU - Pepe, Marco
AU - Yao, Yiming
AU - Mobasher, Barzin
AU - Toledo Filho, Romildo Dias
N1 - Funding Information:
The present study is part of the activities carried out by the Authors within the “SUPERCONCRETE″ Project (www.superconcrete-h2020.unisa.it) funded by the European Union's Horizon 2020 Research and Innovation Programme under Grant Agreement No 645704 (H2020-MSCA-RISE-2014) and within the Science Without Border project funded by CNPq.
Publisher Copyright:
© 2017 Elsevier Ltd
PY - 2017/9
Y1 - 2017/9
N2 - This study proposes a comprehensive analysis on the structural performance of reinforced Recycled Aggregate Concrete members. Particularly, it summarizes the results of an experimental investigation aimed at analyzing the tension stiffening behavior of normal and high strength class concretes produced with Recycled Concrete Aggregates (RCAs). The mixtures were proportioned in order to achieve 25 and 65 MPa of compressive strength and, moreover, several recycled-to-natural coarse aggregates replacement ratios were considered: 0%, 25% and 50%. The results derived from this type of test furnish a comprehensive analysis on both the steel-to-matrix interaction and the crack formation and propagation on concrete elements as well as distributed cracking mechanisms. Using a finite difference numerical model, the experimental results are used to back-calculate and identify the steel-to-concrete bond slip law. Also, it is an alternative mean of developing the stress-crack-width law for concrete in tension. The results showed that the use of recycled concrete aggregate does not affect the resulting concrete performance and, therefore, the RCAs can be successfully employed, up to the levels analyzed herein, for the production of structural elements made with normal and high strength class concrete mix.
AB - This study proposes a comprehensive analysis on the structural performance of reinforced Recycled Aggregate Concrete members. Particularly, it summarizes the results of an experimental investigation aimed at analyzing the tension stiffening behavior of normal and high strength class concretes produced with Recycled Concrete Aggregates (RCAs). The mixtures were proportioned in order to achieve 25 and 65 MPa of compressive strength and, moreover, several recycled-to-natural coarse aggregates replacement ratios were considered: 0%, 25% and 50%. The results derived from this type of test furnish a comprehensive analysis on both the steel-to-matrix interaction and the crack formation and propagation on concrete elements as well as distributed cracking mechanisms. Using a finite difference numerical model, the experimental results are used to back-calculate and identify the steel-to-concrete bond slip law. Also, it is an alternative mean of developing the stress-crack-width law for concrete in tension. The results showed that the use of recycled concrete aggregate does not affect the resulting concrete performance and, therefore, the RCAs can be successfully employed, up to the levels analyzed herein, for the production of structural elements made with normal and high strength class concrete mix.
KW - Crack propagation
KW - High strength concrete
KW - Recycled aggregate concrete
KW - Steel-concrete bond
KW - Tension stiffening
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U2 - 10.1016/j.cemconcomp.2017.06.009
DO - 10.1016/j.cemconcomp.2017.06.009
M3 - Article
AN - SCOPUS:85021137238
SN - 0958-9465
VL - 82
SP - 176
EP - 189
JO - Cement and Concrete Composites
JF - Cement and Concrete Composites
ER -