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Bituminous Products

Asphalt and Bitmac

Patrick Bradley Ltd produces approximately 150000 tonne of bituminous products in a year. These consist of course, medium and fine graded base course and wearing course bitmacs, .

Patrick Bradley Ltd produces the full range of off the shelf redpe mix BS 594 hot rolled asphalt and BS 4987 macadam (bitmac). We also in-house technical expertise to design both asphalt and macadams to BS 598-107 to meet today's rigorous performance spedifications.

For those not familiar with all the technicalities of flexible bituminous surfacing, our experienced contracting staff are able to guide our customers to the selection of the right materials and construction details to suit any situation, from light duty use all the way through to materials which can withstand high loadings such as HGV lorry parks.

Bradtex 14mm Thin Surfacing System for highways

Technical Specification

The Bradtex 14mm Thin Surfacing System for Highways comprises a mixture consisting of a polymer-modified binder (Caliphalte TS), limestone filler and graded fine and coarse aggregates.

The system is used in conjunction with a K1-40 bitumen emulsion took coat conforming to BS 434-1 : 1984, to improve adhesion to the substrate.

Bradtex 10mm Thin Surfacing System for highways

Technical Specification

The Bradtex 10mm Thin Surfacing System for Highways comprises a mixture of a polymer-modified binder (Cariphalte TS), limestone filter and graded fine and coarse aggregates.

The system is used in conjunction with a K1-40 bitumen emulsion took coat conforming to BS 434-1 : 1984, to improve adhesion to the substrate.

Product List Bitmac

Old Description BS 4987-1:1993 New Description BS 4987-1:2005

Wearing Cousre Macadam Surface Course Macadam Table

6mm Med Graded w/c 0/6 Med Graded s/c 7.6
10mm Close Graded w/c 0/10 Close Graded s/c 7.4
14mm Close Craded w/c 0/10 Close Graded s/ 7.3
10mm Open Graded w/c 0/10 Open Graded s/c 7.2
14mm Open Graded w/c 0/14 Open Graded s/c 7.1

Product List Bitmac

Old Description BS 4987-1:1993 New Description BS 4987-1:2005

Base Cousre Macadam Binder Course Macadam Table

20mm Dense base/c 0/20 Dense binder/c 6.5
28mm Dense base/c 0/32 Dense binder/c 6.4

Product List Bitmac

Old Description BS 4987-1:1993 New Description BS 4987-1:2005

Road Base Macadam Base Course Macadam Table

20mm Dense r/b 0/32 Dense Base 5.2
40mm Dense r/b Deleted from specification

Product List Asphalt

Old Description BS 594-1 1992 New Description BS 594-1 2005

Wearing Course Asphalt Surface Course Asphalt

15/10 w/c Asphalt 15% 0/10 s/c Asphalt
22/10 w/c Asphalt 22% 0/10 s/c Asphalt
30/10 w/c Asphalt 30% 0/10 s/c Asphalt
30/14 w/c Asphalt 30% 0/14 s/c Asphalt
35/14 w/c Asphalt 35% 0/14 s/c Asphalt

Product List Asphalt

Old Description BS 594-1 1992 New Description BS 594-1 2005

Base Course Asphalt Binder Course Asphalt

50/10 b/c Asphalt 50% 0/10 Binder Coarse

50/14 b/c Asphalt 50% 0/14 Binder Coarse
60/20 b/c Asphalt 60% 0/20 Binder Coarse
60/28 b/c Asphalt 60% 0/32 Binder Coarse

SMA 0/14mm bradtex and 0/10mm bradtex

Is a propriety mix, and does not fall under a British standard specification.
Has been designed by ourselves and certificated under HAPPAS by the BBA
Agreed guidelines are to be followed for the mixing and laying of these materials, such as pre-installation checks, production records, temperatures etc.

How all these materials are used

bituminous1

Summary

Wearing course Surface course
Base course Binder course
Road base Base

The materials are all basically the same with new names.

Binder and Temperatures

Bitmac Asphalt

160/220pen or 100/150pen 70/100pen bitumen

Min rolling temps Min rolling temp

160/220pen 60 degrees c 80 degrees c
100/150pen 75 degrees c

Maximum temps at any stage Maximum Temp at any stage

160/220pen - 150 degrees c Binder course- 165 degrees c
100/150pen - 170 degrees c Surface ncourse- 185 degrees c
Open graded - 125 degrees c

Binders and Temperatures cont...

0/10 Bradtex and 0/14 Bradtex (SMA)

Cariphalte TS bitumen

Min rolling temp

110 degrees c

Max temp at any stage

185 degrees c

Asphalt, bitmac and sma uses

Road and pavement construction
Carparks
Private estates and driveways
Airport runways
Industrial parks

Porous Asphalt

Single size aggregate
Voids created in the matrix
Mixture designed for sites where standing water is a problem

Hot Rolled Asphalt

Blend of aggreagate, sand and filler
Dense, hard wearing matrix
Expensive due to volumes of imported materials
Mixture for all types of sites

Surface, binder and base coarse macadam

Well graded aggregate mix.
Tight aggregate mass held together with bitumen
Lower cost material
Mixtures for all types of sites

Stone Mastic Asphalt (SMA)

Single size aggregate
Voids filled with a polymer modified binder
Cost effective for PB to use in place of HRA, only binder to import
Mixture for most types of sites, but needs proper planning to limit snags, bitumen supply, tack coat, road sweeper etc.