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 (A)</p> Signup and view all the answers

What is the primary advantage of injection patching?

<p>It provides a longer life and denser mixture (C)</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 (D)</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 (C)</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 (A)</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 (C)</p> Signup and view all the answers

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

<p>100 – 300 mm (C)</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 (A)</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 (C)</p> Signup and view all the answers

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

<p>20-50 mm (D)</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 (C)</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 (C)</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 (D)</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 (D)</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 (B)</p> Signup and view all the answers

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