Reuse of sanitary ceramic wastes as coarse aggregate in eco-efficient concretes

The sanitary ceramics industry inevitably generates wastes, irrespective of the improvements introduced in manufacturing processes. The present study investigated the reuse of these wastes as recycled coarse aggregate in partial substitution (15%, 20% and 25%) of natural coarse aggregates in the man...

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Bibliographic Details
Published inCement & concrete composites Vol. 34; no. 1; pp. 48 - 54
Main Authors Medina, C., Sánchez de Rojas, M.I., Frías, M.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 2012
Subjects
Aggregates
Cements
Ceramics
Characterisation
Concretes
Ecoefficient concrete
Microstructure
Pastes
Recycled
Recycled aggregates
Reuse
Sanitary ceramic waste
Strength
Wastes
Recycled aggregates
Characterisation
Microstructure
Strength
Ecoefficient concrete
Sanitary ceramic waste
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Summary:The sanitary ceramics industry inevitably generates wastes, irrespective of the improvements introduced in manufacturing processes. The present study investigated the reuse of these wastes as recycled coarse aggregate in partial substitution (15%, 20% and 25%) of natural coarse aggregates in the manufacture of structural concretes. The results demonstrate that recycled, eco-efficient concretes present superior mechanical behaviour compared to conventional concrete and it was moreover appreciated that the recycled ceramic aggregate does not interfere in a negative way during the hydration process. It was also observed that the microstructure in the interfacial transition zone (ITZ) between recycled ceramic aggregate and paste was more compact than in the case of natural aggregate and paste.
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ISSN:0958-9465
1873-393X
DOI:10.1016/j.cemconcomp.2011.08.015