NCHRP project 20-07/task 361 : hamburg wheel-track test equipment requirements and improvements to AASHTO T 324 : research project capsule.

Details

• Creators:
  Mohammad, Louay
• Corporate Creators:
  Louisiana Transportation Research Center
• Subject/TRT Terms:
  • Equipment design
  • Testing equipment
  • Performance measurement
• Publication/ Report Number:
  14-3B
• Resource Type:
  Brief
• Geographical Coverage:
  Louisiana
• Corporate Publisher:
  Louisiana Transportation Research Center
• Abstract:
  The Loaded Wheel Test (LWT) is a laboratory-controlled rut depth test that uses loaded wheel(s) ; to apply a moving load on hot-mix and warm-mix asphalt (HMA and WMA) specimens to simulate ; traffi c load applied on asphalt pavements. In the 1970s Helmut-Wind Incorporated proposed ; a test method and developed specifi cations requirements to measure the combined eff ects ; of rutting and stripping susceptibility. The equipment developed was named the Hamburg ; Wheel Tracking Device (HWTD) and has been used for over four decades worldwide. The HWTD ; measures the combined eff ects of rutting and moisture damage (stripping) by rolling a steel wheel ; across the surface of an asphalt concrete slab that is immersed in a temperature-controlled water ; bath. The interest and use of LWT in performance specifi cations, alternatively referred to as rut ; testers or torture testers, has seen an increase in recent years. This interest can be attributed ; to several factors, including the use of such devices by FHWA and many state Departments of ; Transportation (DOTs). Other important factors in this increased popularity are the ease of use ; and good correlation to fi eld performance, which led many DOTs to incorporate LWT tests in their ; specifi cations as a pass or fail acceptance criteria.
  More +
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/28631/dot_28631_DS1.pdf
• File Type:
  [PDF - 158.40 KB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:4b71b29fce14e3344635ff12b161b9bbb1294a56f83d72e5b507922c484b5ae9