Abstract
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.
| Original language | English (US) |
|---|---|
| Title of host publication | American Concrete Institute, ACI Special Publication |
| Publisher | American Concrete Institute |
| Pages | 46.1-46.10 |
| Volume | 2015-January |
| Edition | SP 305 |
| State | Published - 2015 |
| Event | 1st International Workshop on Durability and Sustainability of Concrete Structures, DSCS 2015 - Bologna, Italy Duration: Oct 1 2015 → Oct 3 2015 |
Other
| Other | 1st International Workshop on Durability and Sustainability of Concrete Structures, DSCS 2015 |
|---|---|
| Country | Italy |
| City | Bologna |
| Period | 10/1/15 → 10/3/15 |
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Keywords
- Chloride
- Corrosion
- Durability
- GFRP
- RCA
- Seawater
ASJC Scopus subject areas
- Civil and Structural Engineering
- Building and Construction
- Materials Science(all)
Cite this
Towards sustainability of concrete without chloride limits. / Selicato, Federica; Moro, Mauro; Bertolini, Luca; Nanni, Antonio.
American Concrete Institute, ACI Special Publication. Vol. 2015-January SP 305. ed. American Concrete Institute, 2015. p. 46.1-46.10.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Towards sustainability of concrete without chloride limits
AU - Selicato, Federica
AU - Moro, Mauro
AU - Bertolini, Luca
AU - Nanni, Antonio
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
UR - http://www.scopus.com/inward/record.url?scp=84962909854&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84962909854&partnerID=8YFLogxK
M3 - Conference contribution
VL - 2015-January
SP - 46.1-46.10
BT - American Concrete Institute, ACI Special Publication
PB - American Concrete Institute
ER -