Describe the techniques used to repair flexible and rigid pavements and their effectiveness for the following treatment types: (a) patching, (b) crack maintenance, and (c) overlays.

What will be an ideal response?


(a) Patching
Techniques: Temporary, permanent, spot seal (spray), cold mix, hot mix, and level.
Effectiveness: When properly done, patching is considered to be effective.
Temporary patching is considered moderately effective to serve for a short period
until permanent repairs can be made.
(b) Crack Maintenance
Techniques: Crack cleaning, sealing and filling
Effectiveness: Relatively effective. Fairly short life. Must be repeated often (1- 2
years)
(c) Overlays
Techniques: Thick or thin. Pavement reinforcing, fabric overlays, inverted overlays
Effectiveness: Considered to be an effective technique.

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