Flexible Pavement Maintenance: Corrective Treatments & Recycling
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Questions and Answers

What is the primary purpose of removing loose materials in patching?

  • To prepare the surface for patching (correct)
  • To apply a tack coat
  • To compact the material
  • To dry the area

    • What is the process called when a dump truck rolls over the patch one or two times after spraying a tack coat?

  • Squaring the sides
  • Throw and go
  • Throw and roll (correct)
  • Blowing out

    • What is the purpose of applying a tack coat in full depth patching?

  • To compact the material
  • To dry the area
  • To remove loose materials
  • To prepare the surface for the HMA (correct)

    • What type of patching is suitable for medium and high severity distresses?

    <p>Full depth patching</p> Signup and view all the answers

    What is the primary advantage of injection patching?

    <p>It provides a longer life and denser mixture</p> Signup and view all the answers

    What is the sequence of steps in full depth patching?

    <p>Excavating, applying tack coat, spreading HMA, compacting</p> Signup and view all the answers

    What is the primary purpose of additives in full depth reclamation?

    <p>To improve the strength of the base course</p> Signup and view all the answers

    What is the process of combining RAP with new aggregate and an asphalt cement or recycling agent to produce HMA?

    <p>Hot mix recycling</p> Signup and view all the answers

    What is the function of the inner drum in the double barrel drum process?

    <p>To dry and superheat the virgin aggregate</p> Signup and view all the answers

    What is the typical depth of milling in full depth reclamation?

    <p>100 – 300 mm</p> Signup and view all the answers

    What is the primary purpose of hot-in-place recycling?

    <p>Preserving the geometrics and conservating natural resources</p> Signup and view all the answers

    What is the term for the process of breaking down the existing pavement to a specified depth?

    <p>Pulverization</p> Signup and view all the answers

    What is the typical depth of hot-in-place recycling?

    <p>20-50 mm</p> Signup and view all the answers

    What is the purpose of the laydown machine in single pass CIR?

    <p>To lay down the recycled material</p> Signup and view all the answers

    What is the main difference between hot-in-place recycling and cold-in-place recycling?

    <p>The use of heat in the process</p> Signup and view all the answers

    What is the purpose of adding new aggregate in cold-in-place recycling?

    <p>To make the recycled mix gradation coarser</p> Signup and view all the answers

    What is the result of not compacting the recycled mix properly in cold-in-place recycling?

    <p>High void ratios and difficulty in compacting</p> Signup and view all the answers

    What is the purpose of a single machine in cold-in-place recycling?

    <p>To perform the cold milling, mixing, and laydown of the new mix</p> Signup and view all the answers

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