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Proposed AASHTO Practice and Tests for Process Control and Product Acceptance of Asphalt-Treated Cold Recycled Pavements (2021) / Chapter Skim
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Appendix C - Proposed AASHTO Standard Method of Test for Evaluating the Shear Resistance of Asphalt-Treated Recycled Pavement Applications Using a Long-Pin Fixture
Pages 137-142

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From page 137...
... The DCP upper assembly is removed and the peak torque observed while rotating a handheld torque wrench connected to the long-pin shear fixture while the number of blows is recorded. These measurements can be used to make time-critical decisions regarding opening to traffic and surfacing of the recycled pavements.
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From page 138...
... REFERENCED DOCUMENTS 2.1. ASTM Standards: - D 6951/D 6951M - 18, Standard Test Method for Use of the Dynamic Cone Penetrometer in Shallow Pavement Applications - C1067 - 12 Standard Practice for Conducting a Ruggedness Evaluation or Screening Program for Test Methods for Construction Materials - C670 - 15 Standard Practice for Preparing Precision and Bias Statements for Test Methods for Construction Materials - C802 - 14 Standard Practice for Conducting an Interlaboratory Test Program to Determine the Precision of Test Methods for Construction Materials 3.
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From page 139...
... 4 inches Shear or raveling fixture FIG 2. Template used for torque measurement.
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From page 140...
... replicate locations with a center-to-center spacing of approximately 1 ft and far enough apart from prior measurements that each measurement is not influenced by the disturbed recycled pavement surface. An example of test locations for shear and raveling resistance is shown in Figure 4.
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From page 141...
... A partial interlaboratory study was conducted in accordance with ASTM C802, Standard Practice for Conducting an Interlaboratory Test Program to Determine the Precision of Test Methods for Construction Materials. However, only three laboratories participated.
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Key Terms

  • shear resistance
  • upper assembly
  • shear fixture
  • base plate
  • test method

  • standard practice
  • pavement surface
  • recycled pavements
  • torque wrench
  • conducted tests

  • properly conducted
  • steel base
  • ruggedness evaluation
  • dynamic cone
  • dcp upper

  • interlaboratory test
  • handheld torque
  • screening program
  • compacted recycled
  • construction materials

  • active filler
  • recycling agent
  • test location
  • handheld wrench
  • shown schematically

  • cone penetrometer
  • dcp hammer
  • test program
  • digital handheld
  • cold recycled


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