Durability of Concrete with Recycled Coarse Aggregates: Influence of Superplasticizers
Source abstract
Abstract
The use of recycled aggregates in concrete production can significantly contribute to its sustainability, but it may also jeopardize its durability. The use of superplasticizers may compensate for this performance handicap by contributing to the improvement of the inner structure of this type of concrete. The main goal of this study is to evaluate the effect of standard and high-performance superplasticizers on the key durability-related properties (shrinkage, water absorption by immersion and by capillarity, carbonation and chloride penetration resistance) of concrete made with different percentages of recycled coarse aggregates (RCA) from crushed concrete and compare the findings with the corresponding effect on conventional concrete. The overall conclusion is that recycled aggregate concrete is more susceptible to deterioration because of environmental conditions affecting this concrete’s durability performance more than that of conventional concrete. However, introducing superplasticizers in recycled aggregate concrete can help to enhance the concrete’s performance and offset this higher susceptibility.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Recycled Aggregate Concrete Performance · Innovative concrete reinforcement materials · Concrete and Cement Materials Research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Environmental Engineer, Instituto Superior Técnico, Technical Univ. of Lisbon, 1049-001 Lisbon, Portugal.
Full Professor, Instituto Superior Técnico, Technical Univ. of Lisbon, 1049-001 Lisbon, Portugal (corresponding author).
Researcher, Instituto Superior Técnico, Technical Univ. of Lisbon, 1049-001 Lisbon, Portugal.
References (22)
Show source-provided references
1. Brodersen J. Juul J. and Jacobsen H. (2002). “Review of selected waste streams: Sewage sludge construction and demolition waste waste oils waste from coal-fired power plants and biodegradable municipal waste.” Technical Rep. 69 European Topic Center on Waste Brussels 1–48.
2. 10.1007/BF0248313810.1007/BF02483138 ↗
3. 10.1016/j.cemconres.2007.02.00210.1016/j.cemconres.2007.02.002 ↗
4. 10.1016/j.cemconcomp.2006.12.00410.1016/j.cemconcomp.2006.12.004 ↗
5. 10.1016/j.cemconcomp.2009.09.00510.1016/j.cemconcomp.2009.09.005 ↗
6. Faury J. (1958). Le béton 3rd Ed. Dunod Paris.
7. 10.1680/macr.2011.63.8.61710.1680/macr.2011.63.8.617 ↗
8. 10.1016/j.conbuildmat.2012.06.07110.1016/j.conbuildmat.2012.06.071 ↗
9. Instituto Português de Qualidade (IPQ). (2005). “Concrete – Part 1: Specification performance production and conformity.” NP EN 206-1 Lisbon Portugal.
10. Instituto Português de Qualidade (IPQ). (2009a). “Testing fresh concrete. Part 2: Slump-test.” NP EN 12350-2 Lisbon Portugal.
11. Instituto Português de Qualidade (IPQ). (2009b). “Testing fresh concrete. Part 6: Density.” NP EN 12350-6 Lisbon Portugal.
12. Instituto Português de Qualidade (IPQ). (2009c). “Testing hardened concrete. Part 3: Compressive strength of test specimens.” NP EN 12390-3 Lisbon Portugal.
13. 10.1016/j.cemconcomp.2011.05.00910.1016/j.cemconcomp.2011.05.009 ↗
14. Laboratório Nacional de Engenharia Civil (LNEC). (1993a). “Concrete: Determination of shrinkage and expansion.” LNEC E 398 Lisbon Portugal.
15. Laboratório Nacional de Engenharia Civil (LNEC). (1993b). “Concrete: Determination of the water absorption by capillarity.” LNEC E 393 Lisbon Portugal.
16. Laboratório Nacional de Engenharia Civil (LNEC). (1993c). “Concrete: Determination of the water absorption by immersion.” LNEC E 394 Lisbon Portugal.
17. Laboratório Nacional de Engenharia Civil (LNEC). (1999). “Concrete: Determination of the carbonation resistance.” LNEC E 391 Lisbon Portugal.
18. 10.1016/j.conbuildmat.2013.03.01110.1016/j.conbuildmat.2013.03.011 ↗
19. 10.1016/S0008-8846(00)00428-210.1016/S0008-8846(00)00428-2 ↗
20. NT BUILD 492. (1999). “Concrete mortar and cement-based repair materials: A chloride migration coefficient from nonsteady-state migration experiments.” Nordtest Oslo Norway.
21. 10.1016/j.conbuildmat.2011.10.05010.1016/j.conbuildmat.2011.10.050 ↗
22. 10.1016/j.cemconres.2006.08.00310.1016/j.cemconres.2006.08.003 ↗