Development of surface friction guidelines for LADOTD : research project capsule.

Details

• Creators:
  Wu, Zhong ; King, Bill
• Corporate Creators:
  Louisiana Transportation Research Center
• Corporate Contributors:
  Louisiana. Dept. of Transportation and Development ; United States. Federal Highway Administration
• Subject/TRT Terms:
  • Friction course
  • Surface course (Pavements)
  • Friction tests
  • Rolling friction
  • Rolling resistance
  • Aggregates
  • Aggregate mixtures
  • Physical properties
  • Texture
  • Polishing (Aggregates)
  More +
• Publication/ Report Number:
  FHWA/LA.11/485
• Resource Type:
  Tech Report
• Geographical Coverage:
  Louisiana
• Edition:
  Research project capsule.
• Corporate Publisher:
  Louisiana Transportation Research Center
• Abstract:
  The current friction guideline of the Louisiana Department of ; Transportation and Development (LADOTD) for a wearing course mixture ; design deals with the polished stone value (PSV) of coarse aggregate ; (which is a relative British Pendulum skid-resistance number measured ; on polished stones). The basic assumption is that the aggregates with ; a high PSV will automatically provide high friction or skid resistance ; for a wearing course mixture. However, the fi eld measurement on skid ; resistance sometimes does not necessarily support such an assumption. ; In fact, there are many parameters that may aff ect the friction resistance ; of a wearing course mixture, and the polished stone value is just one ; of these parameters. The National Cooperative Highway Research ; Program (NCHRP) Project 1-43: Guide for Pavement Friction examined ; several friction-infl uential parameters related to a mixture design. ; Among them include mixture type, surface textures (micro- and macrotextures), ; polished stone value and other aggregate properties, and ; binder properties. Obviously, the use of only polish stone values of ; coarse aggregates would have somewhat clouded the fundamental ; issues related to skid resistance. In addition, since very limited highly ; skid-resistant aggregates are locally produced in Louisiana, such friction ; guidelines tend to screen out locally available materials by requiring ; the imported highly skid-resistant aggregates in a wearing course ; construction, which is usually not cost-eff ective. Therefore, there is a ; need to re-examine the current friction guidelines and develop new ; guidelines in which more frictional characteristics (such as micro- and ; macro-textures) can be considered in a wearing course mixture design. ; Ideally, the new guidelines will allow more locally available aggregates to ; be used in a wearing course mixture.
  More +
• Format:
  PDF
• Funding:
  LTRC Project number: 09-2B ; SIO number: 30000119
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/22262/dot_22262_DS1.pdf
• File Type:
  [PDF - 286.92 KB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:32b9f42c2b22d8bed4b10003a4a0333209309264f47a7199cddba868115c23c8f3f69c27870ed2254db0a94cb34bc326582a30bfbe5e0a5f594b1859d9fa504b