Limestone Surface Course

AC 14mm Close Graded Limestone Binder Course

AC 14mm Close Graded Limestone Surface Course can be used as a surface course and mid layer binder course in footpath, driveway and road construction, these layers give the pavement its load bearing capability.

Our AC 14mm Close Graded Limestone Binder Course is produced in compliance with BS EN 13108.

General Information about Asphalt 

Asphalt is a layer of crushed rock, which relies on the locking and friction of the aggregate to provide strength. The aggregate is composed of a mix of various particle sizes, coarse medium and fine, dependent on specification and a bitumen binder is used to make the layer stick together and prevent it from falling apart.

Whilst modern asphalt uses a bitumen binder, tar used to be the binder of choice. From the 1800’s, tar was produced as a by-product at gas works, and was used early-on as a binder in road construction, hence the word tarmac. The word “Tarmac” is still used to describe asphalt road surfaces, even though tar has not been used since the mid 1970s and has now been replaced with bitumen.