Influence of Attached Mortar Content on the Properties of Recycled Concrete Aggregate

Title: Influence of Attached Mortar Content on the Properties of Recycled Concrete Aggregate
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: 536 - 544
Total Pages: 9
Nb references: 5
Language: English

Abstract: Recycled concrete aggregates mainly differ from natural aggregates in that they are
composed by two materials of different nature: natural aggregate and cement mortar attached
to it. This last material is the origin of the different and worse properties of recycled
aggregates.
The objective of this study is to relate the attached mortar content to recycled aggregate
properties, to establish the mortar content from which aggregate properties essentially get
worse. This aspect can be useful for recycling plants as they will be able to adjust the
production processes to improve aggregate quality, for example, by means of several crushing
processes.
The results show that the main properties unfavourably affected by the attached mortar
content are density, absorption and Los Angeles abrasion. However, the attached mortar
content is not the only determining factor on recycled aggregate properties, also mortar and
natural aggregate quality influence them.

Online publication: 2004-09-29
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2912143756.059