Inflatable Rubber Balloon for Culvert Construction

• Customization: Available
• Condition: Used
• Certification: ISO9001, ISO, CE
• Model NO.: IRB-017
• Usage: Tunnel, Bridge
• Material: Rubber and Nylon Fabric
• Shape: Round
• Diameter: 50-3000mm
• Thickness: 3.2mm
• Length: 5-40meters
• Working Pressure: 0.015MPa
• Usage 1: Construction
• Transport Package: Wooden Case or Pallet
• Specification: Customizable
• Trademark: N/A
• Origin: China
• HS Code: 4016950090
• Production Capacity: 10000set/Month

Product Description

Inflatable Rubber Culvert Balloon for Structure Weight Reduction

Inflatable rubber culvert balloon, also called inflatable rubber core mold or inflatable rubber formwork, which is to form cavities for large reinforced concrete structures including bridge, tunnels, roof, stake, roof board column, beam, building construction, irrigation works and water conservancy projects, etc. In this way, 20% weight of building structure is reduced than those with solid concrete structures. Meanwhile, inflatable rubber culvert balloon shorten the pipe foundation, increase span as well as provide a simpler and safer construction.

Inflatable rubber culvert balloon can be divided into many kinds according to its shape: round, rectangle, octagon, hexagon, trapezoidal and so on. And round inflatable culvert balloon and octagonal inflatable rubber culvert balloon are common used in most projects.

Specification

Features:

1.High strength to withstand the pressure of concrete when the mandrel is inflated.
2.Quality synthetic rubber and natural rubber materials make the mandrel durable, long lasting, flexible and elastic.
3.Save materials, time and efforts.
4.Soft to fold, curly, contract and store.
5.Various shapes including round, oval, rectangular, vaulted, trapezoidal, etc.
6.Great resistance to aging and bulge.
7.Wide applicable temperature ranging form 10°C to 90°C.
8.Easy and convenient to operate - only place mandrels into negative reinforcement cage, inflate them to appropriate work pressure, pour concrete and deflate the mandrels until the concrete is solid, then pull the capsule out.

Details:

Diameter: 9mm to 28000mm.
Total length: 0.8m to 35m.
Other specifications are also available upon customers' requests.

Shapes of inflatable rubber culvert balloon

The 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.

Properties:

The structure of inflatable rubber culvert balloon : the normal types of inflatable rubber culvert balloon are one fabric two rubber and two fabric three rubber. What's more, we can also produce other types of inflatable rubber culvert balloon according to customers' requirements.

Structure

Rubber bridge expansion joints are consisted of rubber, reinforce steel plate, ranura, sealing block, fitting portion, nut plate,
kidney-shaped cap, nuts and bolt.

Technical Specifications

(Custom configurations available upon request.)

Items	Index
Thickness of rubber and fabric, mm	2.4mm - 15mm
Hardness(Shore A)	65 ± 5
Adhesive tension of rubber and fabric, N/25mm	≥8
Tensile strength, MPa	≥12
Elongation at break, %	≥350
300% Stretch set length, MPa	6
Stretch for deformation ratio	≤20 % (Prevent distortion)
Suitable temperature, °C	-10 to 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, and quantity of the trace is not more than one. The deformation is not more than 2mm.

Diameter variable /unchanged round inflatable rubber culvert balloon. 

Round Inflatable Rubber Culvert Balloon: Diameter Unchanged and Diameter Variable
Round inflatable rubber culvert balloon , also called round concrete precast inflatable rubber formwork, is common used in many concrete projects, such as stake, roof, beam, building and so on. Round inflatable rubber mandrel can be divided into two kinds: diameter unchanged round inflatable rubber culvert balloon and diameter variable round inflatable rubber culvert balloon.

The details of round inflatable rubber culvert balloon:
Diameter (mm)	Pressure (MPa)
80	0.12
120	0.1
150	0.08
200	0.07
250	5
400	0.04
500	0.035
600	0.03
700	0.027
800	0.026
900	0.025
2200	0.005

The specification of round inflatable rubber mandrel:
Diameter unchanged round inflatable rubber culvert balloon		Diameter variable round inflatable rubber culvert balloon
Φ180mm × 6m - 20m	Φ400mm × 10m - 40m	350 × 530 (540) mm × 10m - 40m
Φ200 (Φ220) mm × 10m - 20m	Φ500mm × 10m - 40m	320 × 520 (540) mm × 10m - 40m
Φ240 (Φ250) mm × 15m - 40m	Φ600mm × 10m - 40m	350 (360) × 560 mm × 10m - 40m
Φ300 (Φ330) mm × 15m - 40m	Φ620mm × 10m - 40m	360 × 640 (650) mm × 10m - 40m
Φ350 (Φ360) mm × 10m - 40m	Φ700mm × 10m - 40m	350 × 520 (550) mm × 10m - 40m

Diameter unchanged / variable octagon inflatable rubber mandrel.

Octagon Inflatable Rubber Culvert Balloon : Diameter Unchanged and Diameter Variable
Octagon inflatable rubber culvert balloon is often used in reinforced concrete members, bridge construction, irrigation works and tunnels, such as stake, roof, beam, building and water conservancy projects. Octagon inflatable rubber mandrel can be divided into diameter unchanged octagon inflatable rubber culvert balloon and diameter variable octagon inflatable rubber culvert balloon.

The specification of octagon inflatable rubber mandrel:
Diameter unchanged octagon inflatable rubber mandrel	Diameter variable octagon inflatable rubber mandrel
550mm × 710mm × 21m	760mm × 360mm change to 600mm × 360mm × 11m
800mm × 460mm × 15m	760mm × 460mm change to 600mm × 460mm × 14m
360mm × 550mm × 11m	760mm × 560mm change to 600 × mm560mm × 17m
550mm × 560mm × 17m	760mm × 710mm change to 600mm × 710mm × 21m

Trapezoidal inflatable rubber culvert balloon.

Inflatable rubber culvert balloon have many shapes, such as round, octagon, elliptical and trapezoidal. Round inflatable rubber cuvlert balloon  and octagon inflatable rubber culvert balloon are often used in concrete projects, but elliptical inflatable rubber culvert balloon and trapezoidal inflatable rubber culvert balloon are also used in reinforced concrete members, bridge construction, irrigation works and tunnels. They can bear high pressure and they can be repeated used, so they are welcomed in many concrete projects.

Elliptical inflatable rubber culvert balloon.

Inflatable rubber culvert balloon have many shapes, such as round, octagon, elliptical and trapezoidal. Round inflatable rubber cuvlert balloon  and octagon inflatable rubber culvert balloon are often used in concrete projects, but elliptical inflatable rubber culvert balloon and trapezoidal inflatable rubber culvert balloon are also used in reinforced concrete members, bridge construction, irrigation works and tunnels. They can bear high pressure and they can be repeated used, so they are welcomed in many concrete projects.

Company Profile

Willmore New Material Co.,Ltd.

Willmore is a professional Rubber&Construction manufacturer in China. The factory is located in Jiangsu, closed to Shanghai. After 15 years of development, it has a mature production system, a professional engineering team, a quality inspection department and a strong production line, providing a one-stop design scheme and product design for customers in many countries.

Our main products are rubber sealing products, pipe sealing ring, car sealing ring, etc., water treatment equipment, aeration pipe, aeration disk, large pipe machine, driving, etc., we pay attention to quality, and will make different solutions according to different customers, provide the cheapest price, achieve the most perfect effect, has reached more partners for customers, look forward to cooperation with you!

FAQ

Q: What’s the lead time for orders?
A: Standard models ship in 15–30 days; customized units require 30–45 days.

Q: Do you provide after-sales service overseas?
A: Yes, we have partnered service centers in key regions.

Q: Can I request a customized bucket size?
A: Absolutely! We offer tailored attachments.

Q: What documents do you provide for export?
A: Full export package (Commercial Invoice, Packing List, Bill of Lading, COC, etc.).

Q: How do I place an order?
A: Contact us via email/phone for a quote, then confirm with a PO.