The effect of Cryogenic Crumb Rubber in cold recycled mixes for road pavements

Matteo Pettinari, Giulio Dondi, Cesare Sangiorgi, Ole Hededal

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Over recent years, the necessity of reducing the environmental mpact of building new infrastructures has increasingly directed research toward developing innovative manufacturing methods and materials that can satisfy these objectives. Cold recycling, widely used in renovating road pavements in Italy, is also moving in this direction, lowering the manufacturing temperatures of bituminous mixes and reducing or ultimately eliminating the use of virgin raw materials. Currently, a wide range of materials are used and, consequently, the number of variables to be considered in the mix-design process of cold recycled mixes for road bases is considerable. Furthermore, new products are continuously being introduced or developed for recycling purposes. The objective of this research project was to test the effects, both mechanically and environmentally, of crumb rubber included in 100% Reclaimed Asphalt Pavement cold mixes for road bases, bound with bitumen emulsion and cement. The crumb rubber is produced cryogenically with granulometric selection, which together with the bitumen, the cement and the fine fractions of the mix forms a resilient mastic capable of imparting significant fatigue resistance properties to the conglomerate. © 2014 Elsevier Ltd. All rights reserved.
Original languageEnglish
JournalConstruction and Building Materials
Volume63
Pages (from-to)249-256
Number of pages8
ISSN0950-0618
DOIs
Publication statusPublished - 2014

Keywords

  • Cold recycled mixes
  • Cryogenic Crumb Rubber
  • Reclaimed Asphalt Pavement
  • Indirect Tensile Strength
  • Fracture toughness
  • Bituminous materials
  • Cements
  • Cryogenics
  • Emulsification
  • Industrial research
  • Manufacture
  • Roads and streets
  • Rubber
  • Tensile strength
  • Bitumen emulsion
  • Bituminous mixes
  • Cold-recycled
  • Crumb rubber
  • Indirect tensile strength
  • Innovative manufacturing
  • Reclaimed asphalt pavements
  • Resistance properties
  • Recycling

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