Influence of industrially produced recycled aggregates on flow properties of concrete

Title: Influence of industrially produced recycled aggregates on flow properties of concrete
Author(s): F. Buyle-Bodin, R. Hadjieva-Zaharieva
Paper category : journal
Serial title: Materials and Structures
Abreviated Serial title: Mater. Struct.
ISSN: 1359-5997
Publisher: RILEM Publications SARL
Volume: 35
Issue: 252
Issue date: 2002-10-01
Publication year: 2002
Pages: 504 - 509
Total Pages: 6
Nb references: 17
Language: English

Abstract: This research aims at evaluating the main risks for the durability of concrete made of industrially produced recycled aggregates called Recycled Aggregate Concrete (RAC).
A characterisation of recycled aggregates is performed and their peculiarities are highlighted.
A comparison between the behaviour of RAC and that of ordinary natural aggregate concrete is carried out.
The influence of both the composition and the curing conditions is discussed.
The durability study is focused on the assessment of parameters representing the porous structure and concrete characteristics.
Because of the high total water/cement ratio of RAC, their flow properties control their durability.
It is established that RAC are characterised by significantly higher water absorption and air permeability.
The diffusion of the carbon dioxide is faster, too.
That leads to a weaker resistance of RAC to environmental attacks.
Since the main durability problems are caused by the fine recycled fraction, its use needs to be restricted.
Another way to increase RAC durability seems to be the extended curing in wet environment.

Online publication: 2002-08-17
Classification: Scientific Reports
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/12673