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
Q. Explain the Mechanism of compaction by paver? Mechanism of compaction by paver, steel-wheeled roller and pneumatic tire rollers Paver, steel-wheeled roller and pneumat

What are the problems in under water concreting?


we are given a project on field.i''d like to know about how to start n proceed vd fly levelling in the field

Q.What Hydrographic data required for Design of bridge? (i) Design discharge for bridge waterway and foundation with corresponding high flood levels. Frequency curve for annual

Q. Show Constituents of bricks? The brick is manufactured out of special. Type of brick earth consisting of clay and sand the proportion of clay and earth should be such that w

if the slump of concrete drops how to rectify it

Airport Management: Airlines (a)        Adequate space for each airline for ticketting, check-in and baggage handling, and (b)       Adequate space for airline staff.

Construction of Embankment: The following steps describe embankment construction : (a) The ground is cleared and grubbed and all vegetation, grass, roots, etc. are removed

Q. Show Suspended Impurities in water? The solid particles which are dispersed in water are referred as suspended Impurities. These are microscopic as under-