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

What is admixtures, Q. What is Admixtures? These are the substance whic...

Q. What is Admixtures? These are the substance which are added to the concrete to improve its qualities either its placing or in its subsequent performance. An admixture may be

Average heating season outside temperature, Produce a manual determination ...

Produce a manual determination to determine the instantaneous rate of heat loss (kW) through one part of the fabric (eg roof, glazed area, wall) based on an internal building desig

Water or hydraulic horsepower (whp), Water Or Hydraulic Horsepower (whp) ...

Water Or Hydraulic Horsepower (whp) The work performed by a pump is a function of the head added by the pump (h A ), the flow rate required (Q) and the mass of the fluid (accou

Bridge engineering, long span bridge or continuous bridge which is more pre...

long span bridge or continuous bridge which is more preferable and why ??? what is the major problem in continuous bridge and what would be its effect if there is any differential

Illustrate the purpose of pedestals, Q. Illustrate the Purpose of pedestals...

Q. Illustrate the Purpose of pedestals? When structural steel works are connected to foundation, pedestals are generally designed to carry loads from metal columns through grou

Phyisc, describe abot the michelson interfrance

describe abot the michelson interfrance

How to design marginal embankments, Q. How to design Marginal Embankments? ...

Q. How to design Marginal Embankments? Design aspects of marginal embankments are similar to those of approach banks. The aspects needing special attention are dealt with below

Lintel, what is the classification of lintel

what is the classification of lintel

Equipments required for under water inspection of bridge, Define Equipments...

Define Equipments and tools required for under water Inspection of Bridge? Since the underwater inspection of stone masonry substructures involve only a cursory inspection of t

Air traffic control, Air Traffic Control: Importance of Air Traffic...

Air Traffic Control: Importance of Air Traffic Control Air Traffic Control is a system by which routes for flying aircraft are defined, flight rules are framed, and f

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