PROPERTIES OF CONCRETES WITH RECYCLED AGGREGATES: INFLUENCE OF PROPERTIES OF THE AGGREGATES AND THEIR INTERPRETATION
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Published:1998
M Barra, E Vázquez, 1998. "PROPERTIES OF CONCRETES WITH RECYCLED AGGREGATES: INFLUENCE OF PROPERTIES OF THE AGGREGATES AND THEIR INTERPRETATION", Sustainable Construction: Use of Recycled Concrete Aggregate: Proceedings of the International Symposium organised by the Concrete Technology Unit, University of Dundee and held at the Department of Trade and Industry Conference Centre, London, UK on 11 – 12 November 1998, Ravindra K. Dhir, Neil A. Henderson, Mukesh C. Limbachiya
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The production of concrete with recycled aggregate is the most desirable form of achieving a closed life cycle for concrete as a construction material. This paper describes results of a study undertaken to examine the influence of recycled aggregate on the properties of new concrete.
The results showed that the production method and the porosity of cement attached to the recycled aggregate has an influence on the properties of new concrete. The interphases obtained under different mixing sequences are decisive for mechanical properties. In addition, it was clear that recycled aggregate concrete can provide strength equivalent to the corresponding concrete with conventional aggregates, providing the cement content increased, typically by 7.2% for 40 MPa concrete. The recycled aggregate concretes exhibited 20% lower modules of elasticity than the natural aggregate concrete. The strength of the recycled concrete incorporating brick, as aggregate was not reduced until an incorporation of 40%.
ABSTRACT
INTRODUCTION
PRODUCTION OF RECYCLED COARSE AGGREGATE
PROPERTIES OF COARSE AGGREGATES
PLAN OF THE DOSAGE STUDY
PRODUCTION OF CONCRETE
PROPERTIES OF RECYCLED CONCRETES
CONCLUSIONS
GENERAL CONCLUSIONS
SPECIFIC CONCLUSIONS
FUTURE RESEARCH
REFERENCES
