![mark on asphalt texture mark on asphalt texture](https://i.pinimg.com/originals/22/dc/06/22dc069fda96b76407bddbd099b89c13.jpg)
As a rule of thumb however, the depth should be at least 4 times the dimension of the largest nominal size in the mix for surface course (i.e. How much asphalt do I need?Īs a guide, please refer to our Material Calculator. Our Proprietary Materials often include additives to achieve these high levels of operation. The Proprietary Materials offered by Breedon Group are extensively designed and rigorously tested to exceed the performances of traditionally used asphalts in specific applications. What are Proprietary Materials and why choose these over ‘normal’ asphalt materials? Our Sales Department will be able to offer advice on the most suitable types of asphalt for your requirement. This will depend on the application which it is to be used. 100/150 pen bitumen is the preferred grade for most applications in the UK, although 40/60 is used for heavily trafficked roads, and 160/220 is often used for hand lay work as it is easier to apply. Commonly used bitumen grades in the UK are 40/60 pen, 70/100 pen, 100/150 pen, and 160/220 pen. Lower ‘pen’ bitumens also have higher softening temperatures compared to higher ‘pen’ grades. Lower ‘pen’ value bitumens are therefore stiffer (i.e. What do the different grades of bitumen refer to?īitumen is graded on stiffness (penetration in tenths of a mm of a 100g needle dropped onto a bitumen sample for 5 seconds at 25☌ and softening point). Asphalts can further be grouped into roadbase, binder and surface courses, each providing a different function in flexible pavement construction. What are the different types of asphalt?Ĭommonly used asphalts in the UK are asphalt concretes (previously termed ‘bituminous macadams’ or ‘bitmacs’), hot rolled asphalts (HRAs), and stone mastic asphalts (SMAs).
![mark on asphalt texture mark on asphalt texture](https://i.ytimg.com/vi/irnNvSt6qNo/maxresdefault.jpg)
Typically asphalt is black, but it may also be red, green, blue and golden. Asphalt is commonly used in the construction of roads, pathways, car parks, driveways and play areas. Asphalt may also incorporate additives to improve performance (e.g. Essentially, asphalt is a combination of aggregate (crushed rock and / or sand) and bitumen (derived from crude oil).