18 Questions
What is the primary purpose of removing loose materials in patching?
To prepare the surface for patching
What is the process called when a dump truck rolls over the patch one or two times after spraying a tack coat?
Throw and roll
What is the purpose of applying a tack coat in full depth patching?
To prepare the surface for the HMA
What type of patching is suitable for medium and high severity distresses?
Full depth patching
What is the primary advantage of injection patching?
It provides a longer life and denser mixture
What is the sequence of steps in full depth patching?
Excavating, applying tack coat, spreading HMA, compacting
What is the primary purpose of additives in full depth reclamation?
To improve the strength of the base course
What is the process of combining RAP with new aggregate and an asphalt cement or recycling agent to produce HMA?
Hot mix recycling
What is the function of the inner drum in the double barrel drum process?
To dry and superheat the virgin aggregate
What is the typical depth of milling in full depth reclamation?
100 – 300 mm
What is the primary purpose of hot-in-place recycling?
Preserving the geometrics and conservating natural resources
What is the term for the process of breaking down the existing pavement to a specified depth?
Pulverization
What is the typical depth of hot-in-place recycling?
20-50 mm
What is the purpose of the laydown machine in single pass CIR?
To lay down the recycled material
What is the main difference between hot-in-place recycling and cold-in-place recycling?
The use of heat in the process
What is the purpose of adding new aggregate in cold-in-place recycling?
To make the recycled mix gradation coarser
What is the result of not compacting the recycled mix properly in cold-in-place recycling?
High void ratios and difficulty in compacting
What is the purpose of a single machine in cold-in-place recycling?
To perform the cold milling, mixing, and laydown of the new mix
Learn about corrective treatments and recycling in flexible pavement maintenance, including patching materials, semi-permanent mixtures, and rehabilitation methods. Quiz covers concepts from Lecture 8 of a civil engineering course.
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