The Carbonation Depth of Fine Recycled Aggregate Concrete

Abstract:

This paper is focused on carbonation resistance of fine recycled aggregate (FRA) concrete. Durability of FRA concrete is connected with uncertainties and doubts. One of the most unknown aspects of FRA cocnrete is carbonation resistance. This paper presents results of carbonation depth of FRA concrete. The FRA was originated from crushed construction and demolition (C&D) waste. There were prepared a total four concrete mixture. The first mixture was reference, did not include the FRA. In other concrete mixtures, natural sand was replaced by the FRA in various replacement ratios, specifically 10%, 20% and 30%. All prepared concrete mixtures were designated with the same parameters for clear comparison. From the test results it is possible to say that the use of the FRA as partial replacement of natural sand in concrete influences carbonation resistance of concrete. The carbonation depth was higher for concrete samples with the use of FRA. However it is possible to say that according to the carbonation resistance, the FRA concrete is possible to be used in the same applications as conventional concrete but it is necessary to verify this results.

• Periodical: Key Engineering Materials (Volume 722)
• Pages: 228-232
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.722.228
• Online since: December 2016
• Authors: Magdaléna Šefflová*, Tereza Pavlů
• Keywords: Carbonation, Concrete, Durability, Recycled Aggregate

References

[1] C. Medina, et. al, Influence of mixed recycled aggregate on the physical – mechanical properties of recycled concrete, in: Journal of Cleaner Production 68, 2014, p.216 – 225.

DOI: 10.1016/j.jclepro.2014.01.002

[2] ČSN EN 206. Concrete – Specification, performance, production and conformity. Prague: Czech standards institute, 2014 (in Czech).

[3] M. Šefflová, T. Pavlů, Study of the Mechanical Properties Development of Concrete Containing Fine Recycled Aggregate, in: Applied Mechanics and Materials 827, 2015, p.267 – 270.

DOI: 10.4028/www.scientific.net/amm.827.267

[4] M. Šefflová, T. Pavlů, Behavior of Concrete Containing of Fine Recycled Aggregate, in: Key Engineering Materials 677, 2015, p.260 – 265.

DOI: 10.4028/www.scientific.net/kem.677.260

[5] J. M. Khatib, Properties of concrete incorporating fine recycled aggregate, in: Cement and Concrete Research 35, 2005, p.763 – 769.

DOI: 10.1016/j.cemconres.2004.06.017

[6] S. M. Levy, P. Helen, Durability of recycled aggregate concrete: a safe way to sustainable development, in: Cement and Concrete Research 34 (11), 2004, p.1975 – (1980).

DOI: 10.1016/j.cemconres.2004.02.009

[7] L. Evangelista, J. de Brito, Durability performance of concrete made with fine recycled concrete aggregates, in: Cement and Concrete Composites 32 (1), 2010, p.9 – 14.

DOI: 10.1016/j.cemconcomp.2009.09.005

[8] O. Holčapek, P. Reiterman, P. Konvalinka, High Temperature Composite of Aluminous Cement with Addition of Metakaolin and Ground Bricks Dust, Applied Mechanics and Materials 486 (2014) 406-411.

DOI: 10.4028/www.scientific.net/amm.486.406

[9] O. Holčapek, F. Vogel a P. Konvalinka, Analysis of mechanical properties of hydrothermally cured high strength matrix for textile reinforced concrete, Acta Polytechnica 55(5) (2015) 313–318.

DOI: 10.14311/ap.2015.55.0313

[10] H. Sun, Study of coarse aggregate and addmixtures on the properties of recycled concrete, Tongji university, Shanghai, (2006).

[11] ČSN EN 1097 – 6. Tests for mechanical and physical properties of aggregates – Part 6: Determination of particle density and water absorption. Prague: Czech Office for Standards, Metrology and Testing, 2013. (in Czech).

[12] ČSN 12 390 - 3. Testing hardened concrete – Part 3: Compressive strength of test specimens. Prague: Czech Office for Standards, Metrology and Testing, 2009. (in Czech).

[13] ČSN EN 13295. Products and systems for the protection and repair of concrete structures – The mesthods – Determination of resistance to carbonation. Prague: Czech Office for Standards, Metrology and Testing, 2005. (in Czech).