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Multiple recycled aggregate properties analysed by X-ray microtomography

Abstract: This paper presents a novel technique used to analyse the volume of adhered mortar to the recycled aggregate. A computerized microtomograph (?CT) device was used to evaluate the volume of the aggregate, the volume of natural aggregate and the volume of adhered mortar. To this end, a natural aggregate has been characterized, using the ?CT, with which a source concrete has been produced. Subsequently, the source concrete has been crushed to obtain a first cycle recycled aggregate. After the characterization of the first-generation of recycled aggregate, a new source concrete has been made with it to be subsequently crushed again obtaining a second-generation recycled aggregates. In the same way a third-generation recycled aggregate has been obtained and has been equally characterized. The results show that the compaction capacity of the aggregate is reduced after successive recycling. It has been possible to quantify how much the closed porosity of the recycled aggregate decreases with the number of times it is recycled. The loss of natural aggregate and increase of the volume of adhered mortar have also been evaluated using this technique.

Otras publicaciones de la misma revista o congreso con autores/as de la Universidad de Cantabria

 Fuente: Construction and Building Materials Volume 166, 30 March 2018, Pages 171-180

Editorial: Elsevier Ltd

 Fecha de publicación: 01/03/2018

Nº de páginas: 10

Tipo de publicación: Artículo de Revista

 DOI: 10.1016/j.conbuildmat.2018.01.130

ISSN: 0950-0618,1879-0526

Url de la publicación: https://doi.org/10.1016/j.conbuildmat.2018.01.130