Durability Indicators in High Absorption Recycled Aggregate Concrete

The use of recycled aggregates in structural concrete production has the inconvenience of increasing the fluid transport properties, such as porosity, sorptivity, and permeability, which reduces the resistance against penetration of environmental loads such as carbon dioxide and chloride ion. In thi...

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Bibliographic Details
Published in:Advances in materials science and engineering 2015-01, Vol.2015 (2015), p.1-8
Main Authors: Jiménez, Luis F., Moreno, Eric I.
Format: Article
Language:English
Subjects:
Aggregates
Cement
Chloride
Concrete
Corrosion
Permeability
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Summary:The use of recycled aggregates in structural concrete production has the inconvenience of increasing the fluid transport properties, such as porosity, sorptivity, and permeability, which reduces the resistance against penetration of environmental loads such as carbon dioxide and chloride ion. In this paper, behavior of ten concrete mixtures with different percentages of coarse aggregate replacement was studied. The recycled material was recovered by crushing of concrete rubble and had high absorption values. The results showed that it is possible to achieve good resistance to carbonation and chloride penetration with up to 50% replacement of recycled coarse aggregate for 0.5 water/cement ratio. Finally, new indexes for porosity and sorptivity were proposed to assess the quality of concrete.
ISSN:1687-8434
1687-8442
DOI:10.1155/2015/505423