How Calculate Asphalt Quantity for Roundabout in Road Construction | How to Calculate Asphalt Quantity in Tons | Asphalt Compaction Factor

In this Article today we will talk about the How Calculate Asphalt Quantity for Round About in Road Construction | How to Calculate Quantity of Dump Trucks in Asphalt | How to Calculate Asphalt Quantity in Tons | What is the Formula to Calculate Asphalt | How to Measure Asphalt Quantity for Road | Asphalt Compaction Factor | Asphalt Base Course | Asphalt Wearing Course

What is Roundabout?

A roundabout (Traffic Circle) is a type of circular intersection or junction in which road traffic is permitted to flow in one direction around a central island, and priority is typically given to traffic already in the junction.

How Calculate Asphalt Quantity for Roundabout in Road Construction?

Note: We will use this method when we are going to find the lose material from compacted material How to Calculate Quantity of Dump Trucks in Asphalt

How To Find The Quantity of Asphalt for Roundabout in Road:

Formula for Calculation of Asphalt in Road:

1. Find out the dimension (Outer Diameter and Inner Diameter)
2. Calculate the Area of Asphalt (Area of Asphalt and Area of Green Belt)
3. Calculate Volume of Asphalt = (Area * Thickness) m^3
4. Find out the density of Asphalt (145 lbs/cft to 2330 Kg/m3)
5. Calculate the quantity of Asphalt= ( Density* Volume)/1000
6. Use the Compaction Factor for AWC (1.28% – 1.30% in Asphalt) and for ABC (1.23% – 1.26% in Asphalt) How to Measure Asphalt Quantity for Road
7. Total Weight of Asphalt with Compaction Factor = Quantity of AWC x Compaction Factor
8. Calculate No of Dump Trucks = Total Weight of AWC Asphalt in Tones / Material in One Dump Truck Asphalt Base Course, Asphalt Wearing Course

Before Reading this Article you must read first: How to Calculate Asphalt or Bitumen Quantity for Road

Given Data (Example):

Outer Diameter of Roundabout = D1 = 40 m

Inner Diameter of Roundabout = D2 = 10 m

Thickness of Asphalt Layer = H = 100 mm = 0.10 m

Quantity of Asphalt Wearing Course Calculation in Road:

Area of Asphalt Portion and Green Belt = A1 = Pi x D1 x D1 x 0.25

Area of Asphalt Portion and Green Belt = A1 = 3.142 x 40 x 40 x 0.25 = 1256.80 m2

Area of Green Belt = A2 = Pi x D2 x D2 x 0.25

Area of Green Belt = A2 = 3.142 x 10 x 10 x 0.25 = 78.55 m2

Net Area = Area of Asphalt Portion and Green Belt – Area of Green Belt

Net Area = A = A1 – A2 = 1256.80 – 78.55 = 1178.25 m2

Therefore, the Volumetric Quantity of Roundabout Section = V = Net Area x H

Volume of Roundabout = 1178.25 x 0.10 = 117.82 Cum

Here, we use a standard Density of Asphalt is 145 lbs/cft or 2330 Kg/m3 which may be somewhat different depending on the precise asphalt mixture.

Quantity of Roundabout = Volume of AWC x Density of Asphalt

Quantity of Roundabout = 117.82 x 2330 = 274520.60 Kg

Compaction Factor (1.28 to 1.30) = 1.26 %

Total Weight of Asphalt with Compaction Factor = Quantity of AWC x Compaction Factor

Total Weight of Roundabout Asphalt with Compaction Factor (Lose Material) = 274520.60 x 1.26 = 345895.956 Kg

Total Weight of Roundabout Asphalt in Tones = Total Weight of AWC Asphalt with Compaction Factor / 1000

Total Weight of Roundabout Asphalt in Tones = 345895.956 / 1000 = 345.89 Tons

How to Find No. of Trucks in Asphalt Quantity?

Material in One Dump Truck = 24 Ton

No of Dump Trucks = Total Weight of AWC Asphalt in Tones / Material in One Dump Truck

No of Dump Trucks = 345.89 / 24 = 14.41 Trucks (Lose Material)

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FAQ’s

Conclusion:

Full article on How Calculate Asphalt Quantity for Round About in Road Construction | How to Calculate Quantity of Dump Trucks in Asphalt | How to Calculate Asphalt Quantity in Tons | What is the Formula to Calculate Asphalt | How to Measure Asphalt Quantity for Road | Asphalt Compaction Factor | Asphalt Base Course | Asphalt Wearing Course. Thank you for the full reading of this article in “The Civil Engineering” platform in English. If you find this post helpful, then help others by sharing it on social media. If any formula of BBS is missing from this article please tell me in comments.