State-of-the-art on the use of fine recycled aggregates in concrete production

Title: State-of-the-art on the use of fine recycled aggregates in concrete production
Author(s): L. Evangelista and J. de Brito
Paper category : conference
Book title: 2nd International RILEM Conference on Progress of Recycling in the Built Environment
Editor(s): V.M. John, E. Vazquez, S.C. Angulo, C. Ulsen
e-ISBN: 978-2-35158-122-3
Publisher: RILEM Publications SARL
Publication year: 2011
Pages: 175 - 183
Total Pages: 9
Nb references: 26
Language: English

Abstract: This paper presents a state-of-the-art on the use of fine recycled aggregates (FRA), manufactured from Construction & Demolition Waste (CDW), in concrete production. As the use of coarse recycled aggregates (CRA) from CDW is becoming a common practice in most countries, researches currently under way now tend to focus on some other directions. One the most important lines of research currently being developed is related to the possibility of using FRA of CDW as replacement (either partially or totally) of natural sands in concrete. Investigations on this matter have not been further pursued mainly because previous attempts on the use of these materials proved to be excessively detrimental to concrete’s performance. As a consequence, most of the worldwide standards currently used greatly limit, or even forbid, the use of FRA in any type of concrete.

In this paper, a concise review of the current level of knowledge on this subject is given, considering the latest information and results published worldwide regarding the behaviour of concrete made with fine recycled aggregates. Mechanical, rheological and durability properties are analyzed, establishing current trends and reporting the most relevant results now known.

Complementary, a summary of currently “unanswered questions” is presented, as well as the steps that are being taken at this moment to answer them.

Online publication: 2012-02-08
Publication type : full_text
Public price (Euros): 0.00