Rubber Inflated Culvert Balloon for Hollow Slabs
The rubber inflated culvert balloon, also known as the bridge inflatable core mold, is an expandable and contractible cylindrical bag made of rubber with a fiber-reinforced layer, featuring excellent tensile strength, elasticity, and air-tightness. It is primarily used to form cavities in concrete components.
When manufacturing hollow components, the inflatable core mold is placed in the middle of the component and is expanded by injecting compressed air. The inflated core mold can withstand the pressure of concrete, thus effectively replacing traditional wooden, bamboo, and steel molds. When in use, simply open the valve, and the airbag will deflate, making it easy to remove from the cavity.
RICB-01: Inflated rubber inflated culvert balloon
RICB-02: Shrinkable rubber inflated culvert balloon
Category
Based on the shape of the rubber inflated culvert balloon, it can be divided into the following common types: rectangular, round, regular octagonal, flat octagonal, reducer, and elliptical.
RICB-03: Rectangular
RICB-04: Round
RICB-05: Regular octagon
RICB-06: Flat octagon
RICB-07: Reducer
RICB-08: Oval
Specifications
| Round φ220 mm × 8.5 m | |
| Round φ260 mm × 10.5 m | |
| Round φ360 mm × 14 m | |
| Round φ390 mm × 14 m | |
| Round φ520 mm × 17 m | |
| Octagonal φ360 mm × 760 mm | Reducer φ360 mm × 600 mm × 11 m |
| Octagonal φ460 mm × 760 mm | Reducer φ460 mm × 600 mm × 14 m |
| Octagonal φ560 mm × 760 mm | Reducer φ560 mm × 600 mm × 17 m |
| Octagonal φ710 mm × 760 mm | Reducer φ710 mm × 600 mm × 21 m |
| Octagonal φ560 mm × 780 mm × 17 m | |
| Octagonal φ710 mm × 800 mm × 21 m | |
| Octagonal φ460 mm × 550 mm × 14 m | |
| Oval φ360 mm × 520 mm × 17 m | |
| Oval φ360 mm × 480 mm × 14 m | |
Production Process
The production process of rubber inflated culvert balloon is divided into two types: cold bonding process and hot pressing vulcanization process.
- The cold bonding process involves first processing the raw materials into sheets (or purchasing finished rubber sheets), then cutting them into corresponding pieces according to the shape of the inflatable core mold, and finally adhering them together with adhesive to form the inflatable core mold.
- The hot-press vulcanization process involves directly vulcanizing natural rubber under heat and pressure, combined with anti-tear fabric, to form the specified shape of the inflatable core mold in a single molding process without any seams.
Requirements for the rubber inflated culvert balloon for hollow core precast beams:
- When installing the rubber inflated culvert balloon, the length specifications of the hollow core precast beams are usually 8 m, 10 m, 13 m, 16 m, 20 m, 25 m, and 30 m; lengths exceeding 30 m are generally not designed as hollow core beams.
- For culvert balloons below 13 m in length, the inner culvert balloon is generally made of rubber; for culvert balloons above 16 m in length, there is more flexibility in the choice of inner culvert balloons, which can be rubber, wood, or steel.
- During the construction process, the rubber inflated culvert balloon is placed inside the rebar cage, inflated with compressed air to form the desired cavity shape, and withstands the pressure during concrete pouring. After use, it can be deflated and removed from the cavity, allowing for multiple reuse.
RICB-09: Hollow core precast beam
RICB-10: Rubber inflated culvert balloon placed into the rebar cage
Inquiry for Our Product
Hengshui Jingtong Rubber Co., Ltd.
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