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Microsurfacing (2010) / Chapter Skim
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Pages 48-54

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From page 48...
... Specific QC/QA testing requirements for both the materials and the finished product are summarized and analyzed in this chapter. QUALITY DEFINITIONS For the purposes of this synthesis, Transportation Research Circular E-C074: Glossary of Highway Quality Assurance Terms (Committee on Management of Quality Assurance 2005)
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From page 49...
... The construction of test strips discussed in chapter six is a good technique to alleviate technical differences of opinion as to what constitutes acceptable quality before the contractor begins full-scale production. Another tool that is often used is inspection checklists that both the agency's inspector and the contractor's QC manager have to allow both parties to check and verify that important details have been accomplished before starting production.
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From page 50...
... However, a general Test U.S. Canada Specification Content Analysis Total Occurrences Residual Asphalt Content 18 6 18 42 Sand Equivalent 17 3 12 32 Wet-Track Abrasion Test ISSA TB 100 15 4 11 30 Wet Stripping Test ISSA 114 12 5 10 27 Softening Point 14 5 7 26 Penetration 12 5 8 25 Mix Time Test ISSA TB 113 12 4 9 25 Classification Test ISSA TB 144 11 4 8 23 Modified Cohesion Test ISSA TB 139 11 4 6 21 Loaded Wheel Test ISSA TB 109 9 3 7 19 Abrasion Resistance 9 2 6 17 Lateral Displacement Test ISSA TB 147 7 5 5 17 Soundness 11 1 4 16 Cure Time Test ISSA TB 139 6 2 3 11 Tests for the Presence of Clay 6 2 2 10 Percent Sodium Sulfate Loss (resistance to freeze/thaw)
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From page 51...
... Excessive overlap is not permitted. Ensure straight lines along the roadway centerline, lane lines, shoulder, or edge lines.
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From page 52...
... Canada Total Crack Reflection 15 5 20 Streaking 9 2 11 Raveling 6 4 10 Delamination 7 1 8 Transverse Joints 5 3 8 Bleeding 4 1 5 Longitudinal Joints 4 0 4 Corrugation 1 1 2 Note: Agencies were asked to check all that applied. TABLE 36 SUMMARY OF COMMON MICROSURFACING POST-CONSTRUCTION DISTRESS Rated Impact (1 = highest rated factor)
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From page 53...
... Canada Total Improper application rate 5 5 10 Dirty or dusty aggregate/gradation issues 4 4 8 Wrong road -- poor project selection 6 2 8 Improper ambient and/or surface temperatures 3 3 6 Improper binder viscosity 3 3 6 Improper binder temperature 3 3 6 Improper surface preparation 3 2 5 Weather 2 2 4 Field construction procedures 1 0 1 Snow plow damage 1 0 1 TABLE 38 REASONS FOR MICROSURFACING FAILURE Public Complaints U.S. Canada Total No Complaints 5 3 8 Road Noise 8 1 9 Appearance 5 3 8 Loose Stone 1 1 2 Vehicle Ride 1 0 1 Do Not Know 8 0 8 TABLE 39 PUBLIC COMPLAINT SUMMARY
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From page 54...
... 5 2 7 Maintenance Funding 2 1 3 Friction Loss 3 0 3 Construction Quality 0 1 1 Do Not Know 2 0 2 TABLE 40 SUMMARY OF SERVICE LIFE FACTORS
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Key Terms

  • test issa
  • transportation research
  • test strip
  • time test
  • mixing machine

  • surface preparation
  • spreader box
  • portation research
  • improper binder
  • dusty aggregate

  • fail shortly
  • improper ambient
  • crack reflection
  • sand equivalent
  • maintenance funding

  • aggregate gradation
  • residual asphalt
  • surface irregularities
  • lane lines
  • square yard

  • traffic volume
  • application rate
  • edge line
  • lane line
  • vertical space

  • georgia dot
  • meets expected
  • design method
  • transverse joints
  • microsurfacing projects


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