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Crumb Rubber in Chip/Spray Seals

  • 1.  Crumb Rubber in Chip/Spray Seals

    Posted 22 May 2019 22:50

    We are currently investigating the use of crumb rubber in chip seals and concerns were raised about it's use at intersections and in steeper areas. I can't find any information either confirming or discounting a drop in performance in these areas. Has anyone out there had practical experience with the use of crumb rubber in spray seals and can  you share with us any advantages and more importantly disadvantages in it's use?

    Any info would be greatly appreciated.



  • 2.  RE: Crumb Rubber in Chip/Spray Seals

    Posted 23 May 2019 21:55
    Blue Mountains started trialing crumb rubber in road reseal close to 10 years ago and have moved to using this for 100% of our road reseal program.  The product we use is we use 15% crumb rubber, (i think by volume).

    Our experience is that its performs is superior and performed better than standard seal materials on hills and intersections.  The elasticity in the rubber component holds the seal together on steep roads and intersections with the crumb rubber product have far less heaving within the braking zone.

    The material is harder to apply at intersections using a hand bar, but an experienced contractor who has been using the product should produce a very good outcome.  If the contractor does not have a lot of experience with the product, a higher level of supervision may be needed for the work.