Croziers Product 2

W.J. & H. CROZIER

QUARRY OWNERS AND

CIVIL ENGINEERING CONTRACTORS

An aerial view of Outlack Quarry taken May 2001

Asphalt and Bitmac

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Asphalt is a mixture of mineral aggregate and a bituminous binder comprising between 4% and 10% of the total. Most asphalts are mixed, heated to around 190ºC, and blended in a batch plant. The asphalt is then hauled and spread to a uniform depth and rolled until compacted into a pavement.

Bitmac is similar to asphalt although sand and filler are not included and less heat is required in the mixing process.

About Our Asphalt and Bitmac

The production of our coated materials is operated by a computer controlled batching plant which controls the aggregate input, rate of feed, temperature of aggregate, penetration value of bitumen etc. This is explained further in Asphalt Production.

You can be assured of the quality of our Asphalt and Bitmac as it is tested on a regular basis by ourselves, external UKAS laboratories or by our suppliers.

We supply the following recipes according to BS EN 4987-1:2003 & BS EN 594-1:2003 specifications;

Bitmac

6mm Dense Surface Course

6mm Medium Graded Surface Course

6mm Medium Graded Surface Course (For Sports Pitches)

10mm Special

10mm Open Graded (For Sports Pitches & Poorly Drained Areas)

10mm Close Graded Surface Course

14mm Close Graded Surface Course

20mm Open Graded Binder Course

20mm Dense Binder Course

28mm Dense Binder Course

28mm Dense Road Base

Asphalt

The first number represents the percentage of binder in the bituminous mixture while the second number denotes the size of aggregate (mm) to be included.

15/10 Asphalt (Used for Footpaths)

30/10 Asphalt (Used for Driveways)

30/14 Asphalt (Used for Roads)

60/20 Asphalt (Used as a base for the above)