Utilization of Recycled Concrete Aggregate for Structural Concrete

Title: Utilization of Recycled Concrete Aggregate for Structural Concrete
Author(s): 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: 693 - 702
Total Pages: 10
Nb references: 6
Language: English

Abstract: Recycled concrete aggregates can be used in many different construction fields, as
geotechnic, roads and concrete, application in which this experimental study is focused.
Its utilization in structural concrete requires the development of technical guidelines or
standards for recycled aggregate, in order to guarantee a safe use. With this objective, a study has been undertaken in the Laboratorio Central deEstructuras y Materiales (CEDEX) to asses the necessary properties and uniformity of the
recycled concrete aggregate production. A periodical control of fifteen samples coming from
a waste recycling plant in Madrid has been carried out. The following physical and chemical
properties were studied: grading, fines, shape, density, water absorption, Los Angeles
abrasion, impurities, chloride and sulphate content. Cores from the original concrete stocked
in the plant were also extracted, being subsequently characterized in the laboratory.
The results show that some of the characteristics of the recycled aggregate are
systematically lower than those usually required to natural aggregate for structural concrete.
So, it is necessary to combine limited proportion of recycled aggregate with natural aggregate
of improved characteristics.The conclusions obtained from this experimental study will be explained in the paper,
including the requirements to be accomplished by natural and recycled aggregate and the
maximum content of recycled aggregate, so that the blend fulfils the specifications.

Online publication: 2004-09-29
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2912143756.077

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