Product Description Bridge Pneumatic core mold ?is inflatable in soft rubber, use compressibility of air to its elasticity, use rubber to its limpness and gas tightness, and use anti-tensile cloth to its toughness. It is made for different shape under particular pressure, and at the same time it could sustain some concrete pressure, at last, achieve its function of making holes. It is based on the technique of preliminary-making concrete hollow slab inner mold, so it can be used in the project of building bridge, culvert and concrete hollow slab. Usage of i?pneumatic core mold : Pneumatic core mold ?is usually used in reinforced concrete members, bridge construction, irrigation works and tunnels, such as stake, roof, roof board column, beam, building, water conservancy project (shipyards, slipway, dock). ? Technical parameters of pneumatic core mold ?: Diameter (D)?: From 9mm to?28000mm. Total Length (TL)?: From 0.8m to 35m. Other specification also available upon customer's request. Types: ? Pneumatic core mold? can not only save materials, but also has the shape characteristics, as it could be round, rectangle, octagon, hexagon, trapezoidal pipeline, etc. ? Schematic cross section for Pneumatic core mold : ? ? Physical characteristic parameter of ?pneumatic core mold : ? ? ? ? ? ? ?