ALL Information DBM With Tack Coat कैसे करते है। DBM(Dence Bituminous Macadam)

इस Vedio मे हमने Dence Bituminous macadam (DBM) और tack coat के बारे मे बाताय हैं।
Method Statement for laying of BC DBM BM and SDBM for main carriageway and service roads

Method Statement For Laying of Binder Coarse (BC), Dense Bituminous Macadam (DBM), Bituminous Macadam (BM) for the main carriageway and Semi Dense Bituminous Macadam (SDBM) for the service roads





Scope of Work
The works generally consist of laying, spreading and compacting of Bituminous Bound Macadam (BBM) for the main carriageway on prepared road base (WMM) which primed previously with prime coat and in accordance to the requirement and specification given (Clause 507).

Materials
Approved source of crushed stone aggregates of 40MM, 20 MM, Key Aggregate of 12 MM and the binder material 60/70 grade Bitumen.


Machinery & Equipment


The equipment to be used for laying and spreading of BBM shall be Tippers, Motar Grader, vibration tandem roller, pneumatic tyre roller, Bitumen boozer and water truck as and when necessary.



Sequence of work


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The surface of the must clear of leaves, or inferior material etc. on WMM which are coated with tack coat , vehicle are not allow to travel on the surface other than trucks and boozer. Before carrying out actual paving operation ensure that the following to be checked on the site.

The transverse cold joint to be vertically cut, cleaned and tack coat to its face.

Transporting of Aggregate.

Number of truck and cycle time, adequacy, start time, Truck cleanliness

Preparation of the base.

The base on which the Bituminous bound macadam course is to be laid shall be prepared ,shaped, and compacted to specified lines, grades. Prime coat shall be over the base as per MORTH Cl.502-4.3