Question
Download Solution PDFThe main disadvantages of concrete roads are that:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
Advantages and disadvantages of Rigid Pavement (concrete pavements):
| Advantages | Disadvantages |
|---|---|
| Long life of 30-50 years | Higher Initial cost |
|
Low maintenance cost (About Rs. 50,000 per km) |
Mud pumping issues frequently occur.
|
| Maintains good riding quality over the full life | It requires skilled personnel for construction. |
|
High Night visibility, and hence lower expenses on street lighting
|
The paving cost is also very high for concrete roads as compared to asphalt roads. |
Additional Information
On the basis of the structural performance of pavements, there are basically two types of pavements : (1) Flexible pavements and (2) Rigid pavements.
- Flexible pavement is a layered system consisting of several courses, the topmost being the strongest, the strength of layers gradually diminishing as one travels down to the lower layers. The pavement as a whole has low flexible strength, and the external load is largely transmitted to the subgrade by the lateral distribution.
- A rigid pavement, made up of a concrete slab of high strength, derives its capacity to withstand the wheel loads from the flexural strength (beam action) of the slab permitting it to slightly bend and take up the stresses imposed on it.
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