The A312, Mandeville Road, a busy A-road linking the A40 to Harrow and servicing the London Underground Station at Northolt required scheduled resurfacing. ULTILAYER, Tarmac’s high-performance asphalt was selected using a 14mm steel slag aggregate and Ultilow warm mix binder technology.
![](https://uploadstarmaccom.blob.core.windows.net/uploads/2021/02/Northolt-steel-slag-asphalt-011-862x485.jpg)