Evaluation of mechanical, physical and chemical properties of recycled aggregates for structural concrete

PANI, LUISA;BALLETTO, GINEVRA;NAITZA, STEFANO;FRANCESCONI, LORENA;TRULLI, NICOLETTA;Mei G;Furcas C.

2013-01-01

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Abstract

The possibility of utilizing recycled aggregates is an excellent solution to the problem of Contruction and Demolition (C&D) waste and at the same time it reduces quarrying operations and limits the use of natural aggregates. Italian Code allows the use of waste produced by C&D to produce recycled aggregates. In this paper the experimental results of recycled aggregates producted by only concrete taken from three authorized storage site located around Cagliari and Carbonia-Iglesias (Sardinia) is reported. The material characterization has been performed to determine the recycled aggregates properties, quantity and distribution of adherent cement mortar for verifying their performance in order to use them in structural concrete production. Results of particles sizes distribution of recycled aggregates realized immediately after crushing are similar to the natural ones. Cement mortar content increase when the particle size decreases. Visual test allows to identify cement mortar condition of recycled aggregate: only cement mortar, with cement mortar coating and without cement mortar coating particles.