Material Requirements

Insitu-Asphalt Material Requirements


Aggregate: The Insitu-Asphalt mixture utilizes three sizes of stone aggregate, 9.5mm & 6.7 mm roadstone plus crusher sand.

Aggregate Grading

Sieve size Nominal size of stone (percentage passing sieve)
9.5mm 6.7mm Crusher Sand
13.2 100
9.5 85-100 100
6.7 0-30 85-100
4.75 0-5 0-30 90-100
2.36 0-5
0.15 0-20
0.075 0-10

Bitumen

An anionic stable grade bituminous emulsion containing a 60% nett bitumen content is used as the binder. The emulsion should conform to SABS 309 specification.

Physical and chemical properties:

Min Max
  • Appearance – Brown
  • Viscosity at 50°C, Saybolt Furol seconds, max.
  • Binder content, % (m/m)
60 62
  • Residue on sieving, g/100 ml
0.25
  • Sedimentation after 60 complete rotations
Nil
  • Coagulation value, % (m/m)
  • Dolerite chippings
  • Portland cement
2


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