How to measure the quantity of asphalt in road construction

Written by: Engr Sami Ullah Stanikzai (

What is Asphalt :

Asphalt is a  the mixture of aggregates which used for binder and filler of the construction of road . And also the asphalt used for the construction of play grounds and parking areas. Different  types of aggregates like crushed rock, sand, gravel are utilized the of mixture of asphalt. The bitumen is used to bind the aggregates crush and sand with each other and provide the smooth surface to the traffic.

Use of Asphalt:

Asphalt are used for surfacing of roads, flooring, roofing, etc. And a Tar is a dark, thick, flammable liquid distilled from wood or coal, consisting of a mixture of hydrocarbons, resins, alcohols, and other compounds.

Now a days asphalt used 70% in constriction works. Because  the bitumen is the waterproof product and and used for the product of roof flat  and also it used for the flat roofs absorb the water. So the bitumen is the important thing to control the water absorption. But usually the bitumen are used in the road construction.


Now i will teach you in this article how to calculate the quantity for asphalt in road construction . but maybe this is not the exact quantity for asphalt.

Let us start:

Given Data to Find out Asphalt in road Constrion:

Breadth of the road = B = 8 meter
Depth of the road = W =  15 centimeter  = o.15 meter
Length of the Road in kilo meters = L = 2000 meter = 2 km

Now we have to find out the volume of Asphalt :

Volume of Asphalt = V = B x W x L = 0.15 x 8 x 2000 = 2400 Cum.

Density of the Asphalt is = 2330 kg /m3

Now we can Find out the Quantity of Asphalt  = Volume of road Section ( For Asphalt ) x Density of Asphalt

=  2400 x 2330 = 559200 kg

Convert the 559200 kg asphalt to Ton’s than divide it by 1000 ( 1 ton is equal to 1000 kg )

therefor : 559200 kg / 1000 = 5592 ton’s

Note: We have different types of Asphalt therefore the Density of asphalt can be change.

1: Porous Asphalt

2: Perpetual Pavement

3: Quiet Pavement

4: Quiet Pavement

5: Warm-Mix Asphalt

Porous asphalt

Porous asphalt used to provide the  pavements offer developers and planners a new tool in their toolbox for managing storm water. These pavements are used mostly for parking lots, allow water to drain through the pavement surface into a stone recharge bed and infiltrate into the soils below the pavement. Such pavements have been proving their worth since the mid-1970s, and recent changes in storm water regulations have prompted many consulting engineers and public works officials to seek information about them.

But we use normally the Warm – Mix Asphalt  and we hot-mix asphalt is, except it is 50-100 degrees Fahrenheit lower. and this kind of asphalt ( Warm – Mix Asphalt) density is 2330 kg/cum. so the above quantity of asphalt is for warm mix asphalt . Because it does not work in the road construction when we do not hot this kind of asphalt with the 50 to 100 degrees.

I have also made this video tor this article, that how to calculation quantity for asphalt in road. if you want to watch that video so you are able to visit my You Tube channel (Civil Engineers) where you can watch my all videos about quantity surveying , Concrete design and structure design etc.

In Next Article I will teach you how to calculate different Materials of road.

Witten by: Engr Sami Ullah (



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