BITUTHENE® 5000

Features

• Cold applied — no heating or hot bitumen bedding adhesive required, self-adhesive overlaps provide continuity.

• Flexible — easily applied, conforms to changes in profile, accommodates shrinkage cracks up to 0.6mm.

• Robust — accepts road-laying machinery.

• Preformed — guaranteed thickness, not subject to site variation.

• Mesh reinforced — provides dimensional stability and resistance to damage.

• Rubber/bitumen — self-adhesive, elastic compound provides bonding and transmission of braking forces to substrate, allows healing of small punctures.

Application

Bituthene 5000 is supplied in rolls 1.00m wide, 20.0m long and in min. membrane thickness of 1.6mm and 2.0mm. The rubberised asphalt is covered with release paper that is removed during installation. The membrane is self-adhesive and cold applied. No special adhesive or equipment is necessary to form laps. Bituthene 5000 is an excellent waterproofing membrane for plazas, bridges, vehicular traffic structures, or parking decks to be overlaid with an asphalt concrete wearing course. It is adaptable for either new construction or repair applications.

Bituthene S5000 strips are recommended for the restoration of concrete pavements with asphalt concrete overlays to prevent premature deterioration of asphalt paving over the transverse and longitudinal joints caused by reflection cracking and sub-base erosion. Bituthene 5000 membrane will remain flexible to perform over the extreme range of service temperatures expected on plazas,bridges, and parking decks. Its toughness and flexibility allow it to cycle over small cracks, even during critical winter months.

The membrane is highly resistant to water and deicing salt solutions. Electrical resistance measurements on structures have been exceptionally high to indicate the effectiveness of Bituthene 5000 in preventing water migration into decks.

Installation

Surface Preparation

Smooth, monolithic concrete surfaces are required for proper membrane adhesion. Surfaces must be free of voids, spalled areas, loose aggregates, and sharp protrusions, with no coarse aggregate visible. Broom finishes must not be used. Concrete must be cured and dry before applications of Bituthene 5000.

Clean surface (broom, vacuum cleaner or compressed air) to remove dust, loose stones, and debris.

Performance

Priming

Apply Primer, Bituthene Primer, to all concrete or masonry surfaces with a lambswool roller (6 ~ 8m² per litre). Allow primer to dry one hour or until tack free. Prime only the area which will be covered with membrane in a working day. Areas not covered with membrane in 24 hours must be reprimed.

Temperature

Apply Bituthene 5000 waterproofing membrane only in fair weather when air and surface temperature are above +5°C.

Slab Drainage and Joints

Provide proper pitch to drains and gutters. Bituthene 5000 should be laid from the low point to the high point with the membrane overlapped min. 50mm in shingle fashion. Weep holes or drainage openings should be provided at the structural deck level to drain water which penetrates the asphalt concrete. A 320 mm reinforcing strip of Bituthene 5000 must be applied over nonworking joints or cracks not exceeding 3mm in width before applying the full coverage of membrane. Terminate Bituthene 5000 at expansion joints and seal terminations with Bituthene Mastic at the termination to ensure a tight seal. Steel finger joints or other expansion joints assemblies should be placed to the level of the asphalt concrete overlay.

Kerb and Termination Edges

Kerb flashing strips should be applied to a joint just below the height of the asphalt concrete overlay and a minimum of 150 mm on the deck. Then apply the first full sheet as close as possible to the kerb. A fillet should be provided at the kerb and parapets to avoid a sharp break at these points. The fillet material (latex modified cement mortar) should be well adhered to the deck and kerb or parapet. Performed cant strips are not recommended.