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SILVA, Rui Vasco; DE BRITO, Jorge. Use of recycled aggregates from construction and demolition wastes in the production of structural concrete. In: ENCONTRO LATINO-AMERICANO SOBRE EDIFICAÇÕES E COMUNIDADES SUSTENTÁVEIS, 1., 2015, Guimarães. Anais... GuimarÃes, 2015.
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Abstract

As the world population increases, the use of natural resources and energy growsproportionally, becoming one of the major environmental concerns or our times. Severaleconomic sectors are already pursuing a solution to this problem, by analysing the added‐valuepotential of reusing their own wastes. The conventional methods of constructing anddemolishing buildings and concrete structures are implemented in such a way that most of theresulting waste is sent to landfills, instead of being recycled or reused in new constructions. Theuse of recycled aggregates from construction and demolition wastes as replacement for naturalaggregates has been considered as one of the most salubrious approaches towards a greatersustainability in construction. A performance‐based classification, based on the physicalproperties of aggregates sourced from these wastes is presented in this paper. It contains astatistical analysis on the effect of increasing recycled aggregate content to the compressivestrength. Furthermore, this paper also presents simple practical rules in conformity with theEurocode 2, such as the relationship between the modulus of elasticity and compressivestrength, application of correction factors to the creep coefficient and the use of existing modelsfor predicting shrinkage.
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