The use of recycled aggregates from building demolition in self-compacting concrete

Title: The use of recycled aggregates from building demolition in self-compacting concrete
Author(s): V. Corinaldesi, G. Moriconi
Paper category : conference
Book title: International RILEM Symposium on Self-Compacting Concrete
Editor(s): O. Wallevik and I. Nielsson
Print-ISBN: 2-912143-42-X
e-ISBN: 2912143713
Publisher: RILEM Publications SARL
Publication year: 2003
Pages: 251 - 260
Total Pages: 10
Nb references: 10
Language: English

Abstract: Early results of an experimental program aimed at producing and evaluating self-compacting concretes made with recycled aggregates are presented and discussed. The recycled aggregates were directly supplied by an industrial crushing plant in which debris from building demolition are suitably selected, ground, cleaned and sieved. Recycled instead of natural aggregates were used by completely substituting either the coarse or the fine aggregate fraction or both. Concretes were prepared with a water to cement ratio of 0.42 and 0.45. Limestone as well as rubble powder were alternatively used as mineral additions, in order to assure adequate rheological properties to self-compacting concrete in the absence of viscosity modifying agents. Preliminary rheological tests were carried out on pastes in which these materials were added to cement. The fresh concrete properties were evaluated through the slump flow and the L-box test. Segregation resistance was also determined. Compressive strength was measured on hardened concrete after 1, 3, 7, 14 and 28 days of wet curing. The results obtained showed that self-compacting concrete could be successfully developed by incorporating recycled aggregates. This encouraging goal, beyond technical performance, matches with the more and more widely accepted sustainable development issues.

Online publication: 2003-08-21
Publication type : abstract_only
Public price (Euros): 0.00