Page 146 - Lecture Notes DCC3113

FEEDBACK ON EXERCISE 10


1. Describe briefly THREE (3) purposes of road maintenance.
(3 marks)
i. To ensure the durability of road.
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ii. To maintain the usage for the traffic user.
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iii. To improve the traffic system operation.
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2. Explain in details the reconstruction techniques for flexible pavement
(5 marks)

 2 categorized : Full and Partial reconstruction
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 Partial reconstruction : needed when pavement layers (except subgrade) have lost their stability and strength
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 If the failure of the road base is too extensive , recycling of the surfacing usually carried out
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 The surface and road base are pulverized, additional aggregate or stabilizers may be added & laid as a new road
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base
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 Removal and rebuilding of all or part of the pavement using new material & construction specification
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

3. Match the correct return period and its activities of routine operation maintenance below.

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