Influence of Recycled Aggregate Quality on Concrete Properties

Title: Influence of Recycled Aggregate Quality on Concrete Properties
Author(s): Alaejos Gutiérrez
Paper category : conference
Book title: International RILEM Conference on the Use of Recycled Materials in Building and Structures
Editor(s): E. Vázquez, Ch. F. Hendriks and G.M.T. Janssen
Print-ISBN: 2-912143-52-7
e-ISBN: 2912143756
Publisher: RILEM Publications SARL
Publication year: 2004
Pages: 545 - 553
Total Pages: 9
Nb references: 4
Language: English

Abstract: Almost all the studies and experiences on recycled concrete agree that the utilization of
recycled aggregates in structural concrete should be limited to recycled concrete aggregate,
and only recommend the use of the coarse fraction, as the fine fraction worsens the properties
of recycled concrete too much.
The objective of this work is to study the influence of different percentages of recycled
concrete aggregate on concrete properties in order to establish a maximum percentage usable
in concrete.
In order to standardize structural recycled concrete properties, an intermediate quality
recycled aggregate, but suitable enough for structural concrete, has been selected. The
following properties have been studied in concretes with 20%, 50% and 100% of recycled
coarse aggregate: slump, density, compressive strength, tensile strength, elastic modulus of
elasticity and drying shrinkage.
In this study, the coefficients to be applied to traditional formulas have been established to
foresee recycled concrete properties.
The results show that the selected recycled concrete aggregate can unfavorably affect to
concrete properties in a larger extent than those established by some international
recommendations (Rilem, Netherlands, etc).

Online publication: 2004-09-29
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2912143756.060