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Standard specification for road works 2015/2016



Standard specification for road works 2015/2016


Standard specification for road works; Reports; PublicationNT




Made available via the Publications (Legal Deposit) Act 2004 (NT).; Check within Publication or with content Publisher.


miscellaneous provisions ■ provision for traffic ■ clearing grubbing and rehabilitation ■ earthworks ■ conformance testing ■ pavements and shoulders ■ stabilisation ■ spray sealing ■ dense graded asphalt ■ slurry surfacing ■ miscellaneous concrete works ■ drainage works ■ protection works ■ road furniture and traffic control devices ■ pavement marking ■ landscape ■ ducting and conduits ■ traffic control signals ■ traffic counting stations ■ street lighting ■ directional (thrust) boring ■ measurement and payment ■ referenced documents ■ nt climate zones table ■ This document specifies the general standards of materials and workmanship required by the Department of Infrastructure for construction of civil road network assets




Roads -- Northern Territory -- Works -- Periodicals.

Publisher name

Department of Infrastructure

Place of publication



Second edition

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PROTECTIVE COATINGS STANDARD SPECIFICATION ROADWORKS DoI REFERENCE TEXT December 2015 Page 134 To avoid flash rusting final rinse should employ the use of demineralised water. 22.20 Application of Protective Coatings Atmospheric Conditions The atmospheric conditions which prevail during the application of coatings shall be such that the surface being coated is completely free of moisture. DO NOT APPLY COATINGS IF: - The ambient temperature is below 5C, unless otherwise permitted by the material suppliers data sheet or - The relative humidity is above 85% or - The metal temperature is less than 3C above the dew point or - The ambient temperature is above 35C, unless otherwise permitted by the material suppliers data sheet or - Any combination of the above. Record the ambient conditions both before and at the completion of each day's coating and at three hourly intervals during coating. Submit this information with other daily records specified. Refer to Contractor Records in INSPECTION AND TESTING. 22.21 Coating Witness Point Hold Point Witness Point Provide copies of specifications for application of protective coatings from the manufacturers of the products used. Provide copies of manufacturers product technical data sheets for all products used. Have all coating materials delivered to the factory, workshop or site in the manufacturers original containers with the labels intact and seals unbroken. All materials which have been stored for longer than the specified shelf life or exposed to conditions outside the permissible storage conditions shall be discarded and replaced. Stored, mix, thin, apply and use all paints strictly in accordance with the coating manufacturers recommendations. Hold Point - Provide coating manufacturers written approval for use before using any other additives (eg promoters, accelerators etc). Do not mix or use coating materials which have livered, gelled or otherwise deteriorated. Do not exceed the pot life of catalysed materials corresponding to the working temperature. When the pot life limit is reached, the spray pot shall be emptied, remaining material discarded, the equipment cleaned, material line shall be emptied and flushed out with nominated solvent/cleaner, and new material mixed and catalysed. 22.22 Thinners Use only thinners and dilutents from the same manufacturer as the specified coating for that coating. Use these only at the rate recommended by the coating manufacturer for the specific application. 22.23 Stripe Coating Stripe coat all metal with edges (100 mm either side of the weld or edge), where practical, prior to applying the remainder of the protective coating. Apply the stripe coating by brush or spray. Use the specified coating materials. Ensure the correct DFT for each coat is achieved. 22.24 Multiple Coats Where multiple coats of paint of the same type are specified, each successive coat of paint shall show, where possible, a distinguishable difference in colour to the one over which it is applied. Comply with coating manufacturer's recommended recoating times for the ambient conditions and temperatures prevailing at the time of coating. If this cannot be achieved and the recoat period is exceeded submit a Non Conformance Report and Corrective Action Report. 22.25 Alternate Coating Hold Point Hold Point - Do not use coating materials other than specified, without written permission from the Superintendent. Alternate coating materials must be included in the Contractors ITP. 22.26 Coating Defects Hold Point Witness Point Adhesion of coatings shall be sound throughout. All coatings shall be free of sagging, pinholes, dry overspray and other defects. Hold Point - Any requirements for the repair of protective coatings shall be identified as a Hold Point in the contractor's ITP. Marking of defective areas shall be made using a marker compatible with the coating over which it is applied. Crayons and paint pens shall not be used. Witness Point - This compatibility between marker and coating is to be confirmed by the coating manufacturer. Provide written evidence of this compatibility if requested by the Superintendent. Sand, or whip blast, and recoat surfaces contaminated by embedded dust to the specified DFT using the full system selected. If the defects cannot be rectified through the above means, then the Contractor is required to submit a Non Conformance Report and a Corrective Action Report.