Materials and Structures

, Volume 43, Issue 1–2, pp 195–202 | Cite as

Effect of natural coarse aggregate type on the physical and mechanical properties of recycled coarse aggregates

  • C. J. Zega
  • Y. A. Villagrán-Zaccardi
  • A. A. Di Maio
Original Article

Abstract

Many environmental problems caused by the large volumes of construction and demolition waste (C&DW), the lack of adequate deposition sites and the shortage of natural resources have led to the use of C&DW as replacement of natural aggregates in the production of new concrete. As in the case of natural aggregates, when recycled aggregates are used to manufacture structural concrete, the assessment of their physical, mechanical and durable characteristics is a key issue. The different physical and mechanical properties of the recycled coarse aggregate (RCA) are evaluated. RCA was obtained by crushing conventional concretes with different strength levels (different w/c ratios) containing four different types of natural coarse aggregates (three crushed stones and a siliceous gravel), which differ in shape, composition and surface texture. There is a significant influence of the natural coarse aggregate (NCA) on the properties of RCA, which in many cases is greater than that of the w/c ratio of the source concrete.

Keywords

Natural aggregate Recycled aggregate Absorption Los Angeles abrasion Flakiness index Mortar content 

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Copyright information

© RILEM 2009

Authors and Affiliations

  • C. J. Zega
    • 1
  • Y. A. Villagrán-Zaccardi
    • 1
  • A. A. Di Maio
    • 1
  1. 1.Laboratorio de Entrenamiento Multidisciplinario para la Investigación Tecnológica (LEMIT)La PlataArgentina

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