Abstract

BURGOS-GALINDO, DIANA MARCELA; GUZMAN-APONTE, ÁLVARO  and  TORRES-CASTELLANOS, NANCY. Mechanical and durable performance of concrete that incorporates commercial fine recycled aggregate. Rev.EIA.Esc.Ing.Antioq [online]. 2019, vol.16, n.32, pp.167-179. ISSN 1794-1237.  https://doi.org/10.24050/reia.v16i32.1210.

This paper presents the results of a technical feasibility study about the use of fine commercial recycled aggregate (ARF) from the construction and demolition wastes (RC&D), in the manufacture of concrete of medium strength. In order to evaluate the mechanical and durable performance of the concretes, different properties such as density, absorption, sorptivity, mechanical strength, indirect traction and chloride ion permeability were studied in a series of concretes incorporating 20% and 40% of the ARF (ARF20% and ARF40%, respectively) replacing the natural fine aggregate (AFN). The results were compared with a standard concrete incorporating natural fine aggregate (ARF0%).

It was found that using up to 40% of ARF in the concrete there is no cause adverse effects on fresh concrete consistency. Although the physical, mechanical and durability properties of concretes in hardened state decrease with the increase in the incorporation of ARF in replacement of the natural fine aggregate; the values of the properties achieved by the concretes ARF20% and ARF40% were affordable to those achieved by the standard concrete ARF0%, and suitable for the manufacture of medium strength concretes.

Keywords : Concrete; chloride resistance; durability; fine recycled aggregates; mechanical properties; sorptivity.

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