Pavement Types
The selection of base course and the surface course depends upon the following factors:
1. Type and intensity of traffic
2. Funds available for the construction project and for the subsequent maintenance.
3. Subgrade soil and drainage conditions.
4. Availability of construction materials at site
5. Climatic condition
6. Plants and equipment available
7. Time available for completing the project.
8. Altitude at which construction has to be done.
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The selection of the pavement type therefore is governed by one or more factors listed above. However the fundamental factors is the traffic volume or intensity. It is suggested that the low cost roads could successfully function with the traffic intensity of 30 tonnes to 200 tonnes per day. The water bound macadam may cater up to 500 tonnes per day. The bituminous pavement may easily cacy up to 1500 tonnes per day. The cement concrete roads are considered suitable for traffic intensity of over 2000 tonnes per day. This however would depend upon the thickness of pavement section, the type of soil subgrade and the desired service life of the road. Each type of pavement has different periods of life after which it starts deteriorating.
2. Funds available for the construction project and for the subsequent maintenance.
3. Subgrade soil and drainage conditions.
4. Availability of construction materials at site
5. Climatic condition
6. Plants and equipment available
7. Time available for completing the project.
8. Altitude at which construction has to be done.
www.vejdirektoratet.dk
The selection of the pavement type therefore is governed by one or more factors listed above. However the fundamental factors is the traffic volume or intensity. It is suggested that the low cost roads could successfully function with the traffic intensity of 30 tonnes to 200 tonnes per day. The water bound macadam may cater up to 500 tonnes per day. The bituminous pavement may easily cacy up to 1500 tonnes per day. The cement concrete roads are considered suitable for traffic intensity of over 2000 tonnes per day. This however would depend upon the thickness of pavement section, the type of soil subgrade and the desired service life of the road. Each type of pavement has different periods of life after which it starts deteriorating.
Highway and Transport Engineering
and this section is about Highway Design
(refference : Khanna, S.K., Justo, C.E.G., Highway Engineering, 3th edition, Nem Chand & Bros Roorkee (U.P.), 1976.)
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