TY - JOUR
T1 - Towards sustainability of concrete without chloride limits
AU - Selicato, Federica
AU - Moro, Mauro
AU - Bertolini, Luca
AU - Nanni, Antonio
N1 - Funding Information:
ACKNOWLEDGMENTS The authors wish to gratefully acknowledge the contributions of the personnel at the Pennsuco Plant of Titan America for the advice, cooperation and permission to use their facilities. Additionally, the authors acknowledge the National Science Foundation (NSF) for the support provided to the Industry/University Center for Integration of Composites into Infrastructure (CICI) at the University of Miami under grant IIP-0933537. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the NSF.
PY - 2015
Y1 - 2015
N2 - This work is part of a project aiming at investigating a new design approach for sustainable and durable concrete structures, which is based on the use of corrosion-resistant reinforcements in order to allow the use of chloride-contaminated raw materials (especially seawater and recycled concrete aggregate (RCA)). Changes in plain concrete properties, as well as the effects on embedded reinforcement (i.e., black steel and glass fiber reinforced polymer (GFRP)) have been studied. Three types of concrete mixes were produced: the first, a standard one, used as the benchmark; the second where freshwater was substituted with seawater; and, the third where chloride-contaminated RCA and seawater were used. For each mix, features of fresh concrete and mechanical properties of hardened concrete were studied. Further information was obtained by microstructural and chemical analyses. Additionally, durability was studied in terms of concrete and reinforcement resistance to aggressive environments. Results show that concrete is not negatively affected by the introduction of seawater in the mix while RCA plays a more important role in concrete properties. As already well established, the use of corrosive reinforcement, such as black steel, is discouraged in chloride-contaminated concrete because of the high corrosion rates due to pitting phenomena.
AB - This work is part of a project aiming at investigating a new design approach for sustainable and durable concrete structures, which is based on the use of corrosion-resistant reinforcements in order to allow the use of chloride-contaminated raw materials (especially seawater and recycled concrete aggregate (RCA)). Changes in plain concrete properties, as well as the effects on embedded reinforcement (i.e., black steel and glass fiber reinforced polymer (GFRP)) have been studied. Three types of concrete mixes were produced: the first, a standard one, used as the benchmark; the second where freshwater was substituted with seawater; and, the third where chloride-contaminated RCA and seawater were used. For each mix, features of fresh concrete and mechanical properties of hardened concrete were studied. Further information was obtained by microstructural and chemical analyses. Additionally, durability was studied in terms of concrete and reinforcement resistance to aggressive environments. Results show that concrete is not negatively affected by the introduction of seawater in the mix while RCA plays a more important role in concrete properties. As already well established, the use of corrosive reinforcement, such as black steel, is discouraged in chloride-contaminated concrete because of the high corrosion rates due to pitting phenomena.
KW - Chloride
KW - Corrosion
KW - Durability
KW - GFRP
KW - RCA
KW - Seawater
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M3 - Conference article
AN - SCOPUS:84962909854
VL - 2015-January
SP - 46.1-46.10
JO - American Concrete Institute, ACI Special Publication
JF - American Concrete Institute, ACI Special Publication
SN - 0193-2527
IS - SP 305
T2 - 1st International Workshop on Durability and Sustainability of Concrete Structures, DSCS 2015
Y2 - 1 October 2015 through 3 October 2015
ER -