Bleeding Also known as flushing it is cause by a concentration of excess binder

Bleeding also known as flushing it is cause by a

This preview shows page 30 - 33 out of 33 pages.

Bleeding Also known as flushing, it is cause by a concentration of excess binder, sometimes in longitudinal spots at the surface of the pavement. Usually found in wheel tracks during hot weather, it may be due to too much binder content in wearing course, increased compaction under traffic, too much binder in maintenance patches, upward migration of binder from lower layers, or binder in wearing course being too soft. It creates slipperiness Slight to moderate bleeding is controlled by blotting with sand or coarse aggregate. Large areas will require overlays to return the surface to desired condition
Image of page 30
Lecture 8 13/04/14 31
Image of page 31
Lecture 8 13/04/14 32 PAVEMENT MAINTENANCE MANAGEMENT Ravelling Sometimes called pitting. It describes the condition which results from a bituminous surfacing progressively disintegrating from the top down, or from the edges inward, due to the dislodgement of aggregate particles under traffic. Usually the result of poor construction practices (e.g too low binder content, overheated binder, inadequate compaction) which are associated with the stripping of bituminous films from aggregates. Inadequate skid resistance This is associated with the abrasive action of heavy traffic and is influenced largely by the bituminous mix and the quality of the aggregates used within it. Application of surface dressing is often the treatment
Image of page 32
Lecture 8 13/04/14 33
Image of page 33

You've reached the end of your free preview.

Want to read all 33 pages?

  • Fall '08
  • Devine,D
  • Road, Truck, Tarmac, Asphalt concrete

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern

Stuck? We have tutors online 24/7 who can help you get unstuck.
A+ icon
Ask Expert Tutors You can ask You can ask You can ask (will expire )
Answers in as fast as 15 minutes
A+ icon
Ask Expert Tutors