Experimental determination of recycled aggregates concrete carbonation

Chendes, Remus and Iures, Liana and Bob, Corneliu and Dan, Sorin and Badea, Cătălin and Tănasie, Cristian: Experimental determination of recycled aggregates concrete carbonation. In: Proceedings of the International Symposium on Analytical and Environmental Problems, (24). pp. 11-14. (2018)

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Abstract

The construction industry is one of the main sources of pollution, starting with the extraction of raw materials and the demolition of existing buildings, providing huge amounts of CDW (construction and demolition waste). Concretes with recycled aggregate have higher porosity than those achieved with natural aggregates, (20-30% higher) which can influence the carbonation depth. A typical C16 / 20 concrete class has been studied with natural aggregates, replacing the various granulometric fractions with recycled aggregates. The 100x100x100mm cube specimens were stored for 28 days in water, tested (physicomechanical characteristics) and subjected to accelerated carbonation experiments. After being stored for 60 days under accelerated carbonation conditions, the specimens were cleaved to determine the carbonation depth after phenolphthalein testing of the faces in the splitting zone, measuring the minimum and maximum carbon dioxide penetration values. Correlation was made between the compressive strengths obtained for the studied specimens and the carbonation depth after the accelerated carbonation experiments in a protected environment - 50% carbon dioxide concentration, temperature 25 ° C and humidity 75-80%.

Item Type: Article
Journal or Publication Title: Proceedings of the International Symposium on Analytical and Environmental Problems
Date: 2018
Volume: 24
ISBN: 978-963-306-623-2
Page Range: pp. 11-14
Uncontrolled Keywords: Hulladékanyagok - hasznosítás - építőipar, Beton
Additional Information: Bibliogr.: 14. p. ; ill. ; összefoglalás angol nyelven
Date Deposited: 2019. Jan. 03. 12:32
Last Modified: 2019. Jan. 03. 12:32
URI: http://acta.bibl.u-szeged.hu/id/eprint/56267

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