Dense bituminous macadam, Civil Engineering

Dense Bituminous Macadam:

A Dense Bituminous Macadam (DBM) is a close-graded premix material having a voids content of 5-10 per cent. Two gradings are normally adopted :

Grading 1

Nominal size of aggregates 40 mm Layer thickness 80-100 mm Bitumen content 4.0 minimum

Grading 2

Nominal size of aggregates 25 mm Layer thickness 50-75 mm Bitumen content 4.5 minimum

The mix design is done by the Marshall method. The binder used is 60/70 penetration grade. Premixing is done in a hot-mix plant, and laying is done by a paver finisher. Rolling is done by 80-100 kN vibratory roller.

Posted Date: 1/22/2013 4:47:54 AM | Location : United States







Related Discussions:- Dense bituminous macadam, Assignment Help, Ask Question on Dense bituminous macadam, Get Answer, Expert's Help, Dense bituminous macadam Discussions

Write discussion on Dense bituminous macadam
Your posts are moderated
Related Questions
What are the various methods of recording measurements? List five items each for various methods of recoding measurements?


Airport Lighting: Lighting of Approach to Runway A good system of identification of the runway when landing is to provide six transverse cross-bars of lights placed a

Q. Fire resistance of steelwork Because of the high thermal conductivity of steel, temperature of unprotected steel is almost the same as temperature of fire. Because the yiel

Harbours: Types of Harbours There are two types of harbours, viz : (a) Natural harbour, which is protected from storms and waves by the natural configuration of t

What is fore bearing and back bearing?how it measure?

what are obstacles in chaining

Explain the Selected Bridges - Underwater Inspection? Those bridges, which require underwater inspection must be noted for individual inspection and inventory records as well b

Explain the Coordinate System 1. A Benchmark provides only elevation data. 2. Coordinate System provides northing and easting coordinates within a defined system. 3. Coor

DESIGN A LINEAR DC POWER SUPPLY WITH THE FOLLOWING SPECIFICATION,SHOW DETAILS STEPS AND CALCULATION...Vload :12v Iload :0.07A Vripple load(p-p) :0.01v TA :45 DEGREE CELCUS