MANUAL 4 - Construction Industry Development Board

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MANUAL 4 – BITUMINOUS PAVEMENT SEALS MODULe 3: Construction of a single seal 1. Specification The specification will call for the construction of a single-seal bituminous surface treatment, constructed in accordance with the relevant specifications referred to in the scope of work in the contract documents. 2. Materials Materials required for the construction of the single seal are: • Surfacing aggregate of the specified size (obtained from a commercial source/ quarry). • Bituminous binder in the form of a bitumen emulsion. 3. Construction plant and equipment The following specialised plant and equipment is recommended to promote the construction of the single-seal surfacing by labour-intensive methods: • Shovels • Brooms • Builders’ wheelbarrows (capacity ± 65 – 67 litres) • Hammer • 7 mm sisal rope, 2 3 50 m rolls • Reinforced paper, 4 rolls 3 1 metre wide • Steel pegs, 300 mm 3 9 mm • Chalk-line equipment • Steel tape, 50 m • 105 litre drums open ended (Photo 4.4 a) with lifting handles (Workshop drawing LIC 010) for spotting aggregate • 105 litre drums (checking spray rates and cleaning spray equipment) • Drum lifter for lifting full drums of binder (Workshop drawing LIC 008) • Dip stick for dipping emulsion in drums (Workshop drawing LIC 001) • Manually operated chip spreader (Photo 4.4 b) (Optional) • Suitably sized vibratory pedestrian roller (Bomag 75 or equivalent) • Motorised hand sprayer (Photo 4.6) • Spray screens (Photo 4.6 and 4.7) and (Figure 4.5) (Workshop drawing LIC 007) Quite simple The above may appear complicated but if the process is carried out with water a few times, and then with diluted emulsion, it is quite simple. IMPLEMENTING EMPLOYMENT INTENSIVE ROAD WORKS 23 MODULE 1 2 3 4 5 6 7
MODULE 1 2 3 4 5 6 7 MANUAL 4 – BITUMINOUS PAVEMENT SEALS Photo 4.4 a Photo 4.4 b Photo 4.6: Spraying with motorised hand sprayer with screens and reinforced paper in use IMPLEMENTING EMPLOYMENT INTENSIVE ROAD WORKS 24
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MODULE 1 2 3 4 5 6 7 MANUAL 4 - BIT
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MODULE 1 2 3 4 5 6 7 Note MANUAL 4
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eferences The framework agreement f
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MANUAL 4 - Construction Industry Development Board

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