inflated rubber mould for making concrete culvert

Model:	dia600 dia900
Brand:	BLESS
Origin:	Made In China
Category:	Construction & Decoration / Other Construction Materials
Label:	rubber balloon , inflated balloon , pneumatic formwork
Price:	US $300 / pc
Min. Order:	1 pc

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Product Description

CULVERT BALLOON

Culvert balloon is used for making concrete pre-casting formwork projects in culvert bridge construction.

pneumatic tubular form, culvert balloon used for making concrete pipe

Material:

Culvert balloon is made from natural rubber and fabric. In general, it is formed by three layers(1+2=2layers of rubber and 1 layer fabric): inner layer is high strength synthetic polymer fabric withstanding the force from concrete and air pressure. Outer layer is vulcanized rubber. Rubber hardness is about 65Shore A to keep its excellent features, such as soft, durable, wear-resistance.

If your concrete slab is thicker, it should be manufactured in 2layers of fabric and 3layers of rubber(2+3).

Standard specification

diameter from 0.2m to 3m,(round)
total length from 1m to 28m(round)
other specifications are also available according to clients’ request.

Technical Parameters

Items	Index
Thickness, mm	3.2±0.2(1+2) 5.0±0.2(2+3)
Hardness(Shore A)	65±5
Adhesive tension of rubber and fabric,N/25mm	≥8
Tensile strength, M pa	≥12
Elongation at break, %	≥350
300% Stretch set length, M Pa	6
Stretch for deformation ratio	≤20 %(Prevent distortion)
Suitable temperature,°C	-10~80
Appearance	No cracks, no bubbles on the surface; the length of impurities trace is not more than 3mm; the depth is not more than 1.5mm; the quantity of the trace is not more than one; the deformation is not more than 2mm.