Flexible Pavement Construction Process | Road Construction process
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About This Video -------------------------------------------------------------------------------
In this video Er. Fazal UR Rahman, Corporate Trainer of Civil Guruji is Explaining about Flexible Pavement Construction Process | Road Construction process
Bitumen road construction consists of various steps such as these steps follows one by one.
1. Preparation of Sub-grade,
2. Preparation of Sub-base course,
3. Preparation of base course,
4. Bituminous Coat
a. Prime Coat
b. Tack Coat
5. Paving of Bituminous Mix
6. Rolling
7. Seal Coat
Sub-grade preparation works involve Earthwork is one of the major works involved in road construction. It involves the removal of top layer of soil, vegetation. Road area is prepared for the finished formation level. This is usually done using a manually and mechanically like tractor shovel, grader etc. Below the formation level, the soil is known as the sub - grade.
The required thickness of the pavement layer is determined by the strength of sub-grade, so it is must important to make the strong subgrade as far as possible. Flexible Pavement Construction Process | Road Construction process
The can make strength of the subgrade by doing these works:
Compacting subgrade mechanically to a high dry density.
Remove vegetation and poor material.
Remove the bad and loose soil by cuttings and replacing with selected fill.
Providing adequate subsoil drainage system.
Maintain camber on sub-sub grade for sub soil drainage.
Earthworks are formed by cut-and-fill, and the type of ‘fill’ material must be considered, not only in terms of its physical properties, but on the conditions in which it is to be used, and the methods of compaction.
Method of Stabilization of Sub-Grade
Generally before sub-base course if we need to make more strength of road we prepare sub-grade course with RBM to stabilize the soil and make the sub-grade strong to bear adequate load which comes from traffic. Flexible Pavement Construction Process | Road Construction process
River Bed Material (RBM), debris etc. are used at road area for soil stabilization generally RBM consist of sand, aggregate, stone and some stone dust for binder. There is no any fix size of the material but we conform that material should be free from bolder. Flexible Pavement Construction Process | Road Construction process
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