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Title: Influence of the quality of recycled aggregates on the mechanical and durability properties of high performance concrete
Authors: Gonzalez-Corominas, A
Etxeberria, M
Poon, CS 
Keywords: High performance concrete
Construction and demolition waste
Recycled concrete aggregate
Ceramic waste aggregates
Mixed recycled aggregates
Issue Date: 2017
Publisher: Springer
Source: Waste and biomass valorization, 2017, v. 8, no. 5, special issue SI, p. 1421-1432 How to cite?
Journal: Waste and biomass valorization 
Abstract: The main objective of this experimental work is to analyse the effect of recycled aggregates (RA), on the basis of the study of the various qualities, of the physical, mechanical and durability properties of high performance concrete (HPC). Five types of recycled aggregates: three coarse RA sourced from parent concretes of 100, 60 and 40 MPa, as well as one coarse mixed recycled aggregate and one fine ceramic waste aggregate were used as replacement for natural aggregates (NA). Two types of coarse NA and two types of river sands were employed for concrete production. On the basis of the findings of our research it was determined that the reduction in quality and the increase in the amount of RA substitution produced a decline in the properties of HPC. According to our analysis of the mechanical properties, a 100 % replacement of coarse NA for recycled concrete aggregates can be employed, providing the RA has been sourced from a 60 MPa minimum-strength concrete. Nevertheless, durability behaviour was greatly influenced by the use of RA, and consequently replacement ratios of high quality RA should be reduced to 50 % to achieve similar behaviour patterns to those of NA concrete. Moreover, severe reductions of RA qualities (sourced from 40 MPa strength concretes or mixed waste) only permitted 20 % replacement ratios on HPC production. However, those concretes containing fine ceramic RA (up to 30 %) reached higher compressive strength, higher chloride-ion penetration resistance and higher improvements of durability properties at longer ages than those concretes produced using NA concrete.
Description: 9th International Conference on the Environmental and Technical Implications of Construction with Alternative Materials (WASCON) - Resource Efficiency in Construction, Santander, Spain, Jun 10-12, 2015
ISSN: 1877-2641
EISSN: 1877-265X
DOI: 10.1007/s12649-016-9637-7
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