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The amount of bitumen used in 1km of road surface can vary depending on factors such as the type of road, climate, and traffic conditions. On average, a standard asphalt road may require around 80-100 tons of bitumen per kilometer. Bitumen is used as a binding agent in asphalt mixes to provide durability and flexibility to the road surface. Proper application and compaction of bitumen are crucial for the longevity and performance of the road.
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MaxineThe exact make-up of a road will depend on several variable factors such as the weight and volume of traffic it has been designed to carry, local climatic conditions and the availability of mineral aggregates. In most cases, bitumen will be needed for its properties of waterproofing and durability and as the cheapest adhesive generally available. A minor secondary road may use bitumen only for its top two courses, at the rate of 7 tonnes per kilometre. A highway engineer may call for three asphalt courses, with tack coats in between, because of asphalt's superior load bearing properties. In this case, bitumen consumption can amount to 1,000 tonnes per kilometre. The bitumen percentage in asphalt is usually between 4-8%.
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