Pavement Treatments

Typical pavement treatments for Urban sealed network (local roads):

Criteria Treatment Type Remarks
Roughness >= 6 Cracking* >= 7 % Reconstruction : New pavement design; removal of existing base layer, and construction of new base & surface layer (e.g. DG10 at 50mm thickness) Rehabilitation Work For top hierarchy roads
Roughness >= 6 Cracking* >= 7 % Insitu stabilisation with 50 mm AC : When granular base exists, stabilisation of base with cement and surface treatment with 50 mm asphalt overlay Rehabilitation Work For top hierarchy roads
Roughness >= 6 Cracking* >= 7 % Insitu stabilisation with 30mm AC : When granular base exists, stabilisation of base with cement and surface treatment with 30 mm asphalt overlay Rehabilitation Work For low hierarchy roads
Cracking* >= 4 & <7 % Reinforcement Seal with 50mm AC: Single coat seal with 10mm stone with two application of polymer modified binder with chopped fibre interlayer and 50 mm asphalt overlay. Rehabilitation Work For top hierarchy roads
Cracking* >= 4 & <7 % Reinforcement Seal with 30mm AC: Single coat seal with 10mm stone with two application of polymer modified binder with chopped fibre interlayer and 30 mm asphalt overlay. Routine/Preventive Maintenance For low hierarchy roads
Roughness <4 Cracking* >= 2 & <4 % AC 50mm overlay : Asphalt concrete overlay of 50mm with Dense Graded 10mm stone (DG10) Routine/Preventive Maintenance For top hierarchy roads
Roughness <4 Cracking* >= 2 & <4 % AC 30mm overlay : Asphalt concrete overlay of 30mm with Dense Graded 10mm stone (DG10) Routine/Preventive Maintenance For low hierarchy roads
Ravelling >= 10 AC overlay 10% ravelling : Asphalt concrete overlay of 30mm with Dense Graded 10mm stone (DG10) Routine/Preventive Maintenance All road types

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