Evaluation of Saw-Cut Sealants for the Prevention of Reflective Cracking in Hot-Mix Asphalt – a Case Study on North Capitol Street

Details

• Alternative Title:
  Evaluation of Saw-Cut Sealants for the Prevention of Reflective Cracking in Hot Mix Asphalt (a Case Study on North Capitol Street, NW) [Title from Cover]
• Creators:
  Arhin, Stephen ; Khan, Wasi ; Hong, Vinh
• Corporate Creators:
  Howard University. Transportation Research Center
• Corporate Contributors:
  United States. Department of Transportation. Federal Highway Administration ; District Department of Transportation
• Subject/TRT Terms:
  Composite Pavements Hot Mix Asphalt Pavement Cracking Paving Materials Preventive Maintenance Reflective Cracking Saw And Seal Hot Mix Asphalt
• Publication/ Report Number:
  IPMA- SAW-02
• Resource Type:
  Tech Report
• Geographical Coverage:
  Washington (District of Columbia);United States
• Edition:
  DRAFT FINAL REPORT
• Corporate Publisher:
  District Department of Transportation
• Abstract:
  Reflective cracking, a common distress that affects composite pavements is caused by cyclical movements in the underlying concrete base that is overlaid with hot-mix-asphalt in reaction to climate and traffic conditions. In an attempt to prevent or control reflective cracking, the saw and seal method, which involves making saw cuts in the overlaying asphalt across and along the direction of travel and sealing with a compressible rubberized low modulus sealant, was studied for its effectiveness in composite pavements in Washington, DC. In the 4 1/2 year field study, the widths of the fifteen transverse and seven longitudinal saw-cut measurement points in the hot-mix-asphalt overlay were measured quarterly since 2006. Statistical tests of significance were conducted to determine the statistical relationship between the changes in mean daily air temperature, average daily traffic, pavement age and the variations of the saw-cut widths. The interactions of changes in mean daily air temperature and average daily traffic (ADT) had a statistically significant impact on variations in transverse and longitudinal saw-cut widths accounting for 95.7% and 91.4% of variations respectively. In addition, a visual condition comparison with the adjacent untreated pavement section showed that the saw and seal method effectively controlled reflective cracking in the composite pavement.
• Format:
  PDF
• Funding:
  RQ594976
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:5bcec2658b28ce7191583945b7be7e534a66062ebba4f39586c86ef29ec9d98bfcd7ec809b4a65304e53addd8bde5f3e58d08d5f24cb7810cc5ddf60e8d43665
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/61585/dot_61585_DS1.pdf
• File Type:
  [PDF - 10.14 MB ]