For asphalt produced as warm mix asphalt using Sasobit 125°C to 155°C. If a delay occurs of more than 30 minutes between successive truck Delays deliveries to the paver, the machine shall be moved clear of the laid asphalt and a proper transverse joint formed. Prior to commencing each day’s operations, and also after any delay Screed to be exceeding half an hour during the day, the screed shall be preheated for Preheated at least 15 minutes in order to eliminate drag marks and imperfections in the finished mat. All kerbs, gullies, grates and other structures shall be protected at all Damage times from damage or defacement by asphalt placement works and the site shall be left in a clean and tidy condition. A sprayed seal shall be applied to the uppermost layer of 14mm asphalt Seal on intermediate course no more than 2 working days after completion of the Intermediate uppermost layer of 14mm asphalt intermediate course. The seal shall Course comply with: a single seal in accordance with Specification 509 POLYMER MODIFIED BITUMINOUS SURFACING. S35E binder at 1.4 L/m2 and 10mm aggregate at 150 m2/m3 In cold or cooler months, when the seal will be trafficked (construction traffic or public traffic) or where specified apply a double double seal in accordance with Specification 503 BITUMINOUS SURFACING. 1st coat CRS/170-60 bitumen emulsion at 0.9 L/m2 of emulsion and 10mm aggregate at 140 m2/m3. 2nd coat CRS/170-60 bitumen emulsion at 1.1 L/m2 of emulsion and 5mm aggregate at 250 m2/m3. 510.42 SURFACE PREPARATION Prior to the placement of asphalt, the Contractor shall carry out General preparation work as detailed in the following clauses. The Contractor sweep all surfaces on which asphalt is to be placed Sweeping under this contract to a clean condition with no appreciable amounts of loose materials or any other foreign matter remaining. Loose surface material against kerbing shall be removed by handwork if necessary. The surface to be paved shall be dry. The pavement layer below the first layer of asphalt shall have a uniform Surface texture with a tightly bonded surface and be primed. The texture of this Condition surface should key the asphalt to the surface and resist any tendency for failures. “slippage”
For asphalt produced as warm mix asphalt using Sasobit 125°C to 155°C. If a delay occurs of more than 30 minutes between successive truck deliveries to the paver, the machine shall be moved clear of the laid asphalt and a proper transverse joint formed. Delays Prior to commencing each day’s operations, and also after any delay exceeding half an hour during the day, the screed shall be preheated for at least 15 minutes in order to eliminate drag marks and imperfections in the finished mat. Screed to be Preheated All kerbs, gullies, grates and other structures shall be protected at all times from damage or defacement by asphalt placement works and the site shall be left in a clean and tidy condition. Damage A sprayed seal shall be applied to the uppermost layer of 14mm asphalt intermediate course no more than 2 working days after completion of the uppermost layer of 14mm asphalt intermediate course. The seal shall comply with: Seal on Intermediate Course a single seal in accordance with Specification 509 POLYMER MODIFIED BITUMINOUS SURFACING. S35E binder at 1.4 L/m2 and 10mm aggregate at 150 m2/m3 In cold or cooler months, when the seal will be trafficked (construction traffic or public traffic) or where specified apply a double double seal in accordance with Specification 503 BITUMINOUS SURFACING. 1st coat CRS/170-60 bitumen emulsion at 0.9 L/m2 of emulsion and 10mm aggregate at 140 m2/m3. 2nd coat CRS/170-60 bitumen emulsion at 1.1 L/m2 of emulsion and 5mm aggregate at 250 m2/m3. 510.42 SURFACE PREPARATION Prior to the placement of asphalt, the Contractor shall carry out preparation work as detailed in the following clauses. General The Contractor sweep all surfaces on which asphalt is to be placed under this contract to a clean condition with no appreciable amounts of loose materials or any other foreign matter remaining. Loose surface material against kerbing shall be removed by handwork if necessary. The surface to be paved shall be dry. Sweeping The pavement layer below the first layer of asphalt shall have a uniform texture with a tightly bonded surface and be primed. The texture of this surface should key the asphalt to the surface and resist any tendency for “slippage” failures. Surface Condition
Specification%20510%20Asphalt%20Intermediate%20Course%2014%20Sep%202018.RCN-D18^23815424.DOCX