Flexible pavement and Rigid Pavement
|Relatively less because these pavements are mainly designed by an empirical method.
|More precise and accurate structure analysis techniques can be used.
|Well designed pavement has about 10-20 years.
|About 40 years
|Repair and Maintenance
|Frequent repair and maintenance is needed.
|Practically little repair and maintenance is needed.
|Possible in the flexible pavement in which minimum initial thickness can be provided and later on additional overlays can be provided.
|Relatively poor riding quality.
|Good riding quality because free from rutting, patholes.
|Penetration of water
|Easily penetrate through the layers due to their less imperviousness.
|Difficult due to high imperviousness.
|Glare and Night visibility
|Surface is black in colour so no light reflects, hence more street light are needed for night visibility.
|Grey in colour so good glare and needed fewer street lights fortnight visibility.
|Traffic dislocation during construction
|Road can be opened quickly for traffic operation
|Traffic can be only opened after 28 days.
|Availability of materials
|Bitumen is a scarce material, It has limited deposits in a few countries.
|Cement can be manufactured easily by limestone in many countries.
|Public facilities and services like water supply pipes, sewer liner, telephone cable etc can be buried below.
|Difficult because of traffic movement.
|It degrades none by burning bitumen.
|Costly according to as a life cycle.
|Elastic layered theory.
Happy Learning – Civil Concept