Dense bituminous macadam, Civil Engineering

Assignment Help:

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.


Related Discussions:- Dense bituminous macadam

Premix, how we can do good premix

how we can do good premix

Curves, procedure on conducting curves in field

procedure on conducting curves in field

Concrete, what do you mean by harsh condrete mix or because of what concret...

what do you mean by harsh condrete mix or because of what concrete mix becomes harsh?

Zones of smear around vertical drains, Zones of smear around vertical drain...

Zones of smear around vertical drains Smear zones are produced during the installation of vertical drains in that zone of soils surrounding the band drains are disturbed. Soil

What are the limits of any soil classification system, Draw neatly the IS p...

Draw neatly the IS plasticity chart and label the symbol of several soils. What are the limits of any soil classification system? Explain the following tests with their meani

Flow, what is maximum flood level

what is maximum flood level

Colour code, in colour working drawing what are the colour code?

in colour working drawing what are the colour code?

Wooden truss, which truss is suitable for 19*22m span on which mangalore ti...

which truss is suitable for 19*22m span on which mangalore tiles can be placed or shud steel truss be preferred for such span and which 1 is more profitable in rural desiggn...

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd