Assessment of recycled concrete aggregate properties required for structural concretes

Type: paper published in a journal

Author

Węglorz, Marek

Ajdukiewicz, Andrzej

Kliszczewicz, Alina

Title variant

Polish

Ocena właściwości kruszyw z recyklingu wymaganych dla betonów konstrukcyjnych

Publication date

2019

Published in

MATEC Web of Conferences

Vol.

262

Abstract

English

Assessment of recycled aggregate concrete (RAC) properties by laboratory tests is still required due to lack of precise guidelines and with taking into account slightly different behaviour of such concretes in comparison with natural aggregate concretes (NAC). It is especially important when recycled concrete aggregates are used for the structural elements. In this paper, the following rules for the whole concrete recycling cycle were defined: (1) rules for examination of original concretes selected for recycling and (2) rules for aggregate preparation and their fractionize as well as design rules for recycled aggregate concrete mixtures (including required tests of recycled aggregates and concrete properties). Requirements towards recycled aggregate concrete formulated in this paper are based on the long term experience and research works on the RAC which were held by A. Ajdukiewicz and A. Kliszczewicz in the Department of Structural Engineering of the Silesian University of Technology, practically since 1995.

Keywords