Static mechanical properties of waste rests of recycled rubber and high quality recycled rubber from crumbed tyres used as aggregate in dry consistency concretes

Abstract

The following research is focused on establishing the differences in the re-use as aggregate in dry consistency concretes of two types of rubber obtained in the process of Tyre recycling, recycled rubber from tyres (RRT): granulated sizes (4–8 mm) of high quality recycled rubber (HQRR) and the waste of the recycling process: steel and textile fibers with rubber tracks (waste from recycled rubber, WRR). Both types were classified and added as aggregate in substitution of coarse aggregates from 20 to 100 % by volume. The physical and mechanical behavior of WRR in concretes was compared with reference concrete and series with HQRR for a future use in precast concrete pieces. In both samples a reduction of mechanical resistance occurs in proportion with the amounts of rubber of substitution, but less in serials with WRR with a successful combination of steel and textile fiber. WRR shows furthermore a reduction in properties such as workability and density, but also an increment in porosity. These facts facilitate new options for waste from RRT in concretes and therefore lower energy costs, achieving a success rate in the recycling process close to 100 %.

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Acknowledgments

Cementos Protland Valderrivas for cement suply, Gestión Medioambiental de Neumáticos S.L. (GMN) for HQRR supply, SUFI S.A. (Grupo Sacyr-Vallehermoso) for WRR supply and to LAFARGE S.A. for stone aggregate supply.

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Correspondence to Nelson Flores Medina.

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Flores-Medina, D., Flores Medina, N. & Hernández-Olivares, F. Static mechanical properties of waste rests of recycled rubber and high quality recycled rubber from crumbed tyres used as aggregate in dry consistency concretes. Mater Struct 47, 1185–1193 (2014). https://doi.org/10.1617/s11527-013-0121-6

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Keywords

  • Tyres
  • Rubber
  • Fiber
  • Textile
  • Recycle