The use of cryogenic crumb rubber in the cold recycling technique

Matteo Pettinari, G. Dondi, C. Sangiorgi, F. Petretto

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

In recent years, recycling has become one of the most attractive pavement rehabilitation alternatives, and different recycling methods are now available to address specific pavement distresses and structural needs. Cold recycling is an economically efficient and environmentally friendly method for producing bituminous layers of adequate strength. This technique has been successfully used in Italy during the past 15 years to rehabilitate or upgrade many thousands of kilometers of highway and motorway pavements. Currently a wide range of materials can be used, and consequently the number of variables to be considered in the mix-design process is large. Being that this is a relatively new technique, new products are continually introduced or developed for recycling purposes. The main objective of this study is to investigate and evaluate the effects of crumb rubber, cement, and bitumen proportions on the engineering properties of fully recycled cold mixes. In fact, the experimental plan includes the use of various quantities of cryogenic crumb rubber (CCR) in mixtures containing 100% of reclaimed asphalt pavement, bituminous emulsion, and Portland cement. Thanks to the new European and national regulations, the use of recycled rubber in road construction applications has been growing so far, and this application could represent a valid alternative to the classical use of rubber in HMAs. © 2013 American Society of Civil Engineers.
Original languageEnglish
Title of host publicationAirfield and Highway Pavement 2013 : Sustainable and Efficient Pavements
Number of pages12
PublisherAmerican Society of Civil Engineers
Publication date2013
Pages1088-1099
DOIs
Publication statusPublished - 2013
Externally publishedYes
Event2013 Airfield and Highway Pavements Conference: Sustainable and Efficient Pavements - Los Angeles, United States
Duration: 9 Jun 201312 Jun 2013
http://content.asce.org/conferences/pavements2013/

Conference

Conference2013 Airfield and Highway Pavements Conference
CountryUnited States
CityLos Angeles
Period09/06/201312/06/2013
Internet address

Keywords

  • Asphalt pavements
  • Cryogenics
  • Emulsification
  • Portland cement
  • Rubber
  • Rubber applications
  • Recycling
  • Bituminous emulsions
  • Bituminous layers
  • Construction applications
  • Engineering properties
  • Experimental plans
  • Pavement rehabilitation
  • Reclaimed asphalt pavements
  • Recycling methods

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