MANUAL 4 - Construction Industry Development Board

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<strong>MANUAL</strong> 4 – BITUMINOUS PAVEMENT SEALS • Transportation of workers on open trucks/trailers must be controlled, e.g. all passengers must be seated with no legs hanging over the side of the truck/trailer. • No children must be allowed on the construction site or contractors camp. • Fire extinguishers in good working order must be available especially when working with hot binders. 3.2 Special precautions when working with bitumen binders 3.2.1 Fire hazards • Distributor tankers When hot binders are delivered to site in distributor tankers (e.g. Otta seals) below spraying temperature; burners (open flame) will be used for heating the binders to the required temperature for spraying and there will be fire risks. Therefore, it is advisable to have fire extinguishers readily available on site, in spite of binder suppliers (supposedly) having distributors equipped with fire extinguishers. Heating spray bars with open flames, to rectify blocked jets, is also a fire hazard. • Emulsion drums When heating drums of emulsion on site to raise the temperature (although to a much lower temperature than hot penetration bitumen binders), it is essential to stir the binder while heating, to avoid the binder in contact with the base of the drum overheating. This will cause the binder to generate steam, resulting in the binder frothing and boiling over. A person must be in charge of the heating of the drum at all times and should continuously stir the contents in the drum. 3.2.2 Toxicity Cationic emulsions are toxic and must be treated with care, as it is acidic and must therefore be washed off with water as soon as possible. 3.2.3 General • When working with the hand sprayer (motorised), ensure that there are no unnecessary spectators standing near or adjacent to the work – accidents do happen. • Do not allow children to play around on the stockpile of drums of emulsion, or near the work area, especially during sealing operations. 4. Points to note The contractor should take particular note of the following: • Competent staff must be used for controlling traffic, as their actions can affect the safety of both the road users and road workers. • For the same reasons no short cuts must be attempted for the establishment of road signs. • Detailed attention to staff safety increases productivity and staff harmony. IMPLEMENTING EMPLOYMENT INTENSIVE ROAD WORKS 11 MODULE 1 2 3 4 5 6 7
MODULE 1 2 3 4 5 6 7 <strong>MANUAL</strong> 4 – BITUMINOUS PAVEMENT SEALS 5. Notes to designer/consultants 5.1 Deviations According to the COLTO Specifications: Section 1500, the contractor is responsible for the accommodation of traffic. Depending on the size, and experience of the contractor involved in the labour-based construction of the road works, capacity problems may be experienced if he has to construct and maintain by-passes to accommodate the traffic during the construction of the works. In such cases, consideration should be given to executing the construction of by-passes either departmentally or by a separate contract, prior to the commencement of the work. This departmental team or contractor would then also be responsible for the regular maintenance and, where necessary, watering of the by-pass. All other items/activities pertaining to the accommodation of traffic would still remain the responsibility of the road contractor. 5.2 Fire hazards The consultant must ensure that all necessary precautions are taken by the contractor to prevent fires and ensure the safety of the workers and public. The consultant must be conversant with the latest SABITA manuals, regarding safety measures affecting the asphalt/bitumen industry. IMPLEMENTING EMPLOYMENT INTENSIVE ROAD WORKS 12
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eferences The framework agreement f
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MANUAL 4 - Construction Industry Development Board

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