Question
Download Solution PDFThe prestressed concrete pavements for highways can be built without joints in continuous length up to how many metres?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFPrestressed Concrete Pavements:
Prestressed concrete pavements have become increasingly popular in highway construction due to their ability to be built in continuous lengths without joints. This technology helps to eliminate joints while avoiding the formation of cracks in the pavement. Below are the key design considerations:
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Length:
- Pavements can be prestressed up to a length of 120 meters without the need for joints.
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Width:
- A desirable width for prestressed pavements is 3.6 meters.
- A longitudinal joint is recommended due to this width.
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Thickness:
- The minimum recommended thickness for prestressed pavements is 15 cm. This thickness is necessary to provide the required cover for the tendons used in prestressing.
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Stress Magnitudes:
- A minimum prestress value of 22 kg/cm² is recommended for 120-meter long pavements.
- It is suggested to increase this by 10% to account for losses during prestressing.
- If transverse prestressing is needed, it should be within the range of 3 to 4 kg/cm².
Last updated on Jul 1, 2025
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