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Formwork Inflatable Balloons Concret Rubber Tube For Culvert

Short Description:

Culvert Pneumatic Rubber Balloon Pneumatic tubular form is made from natural rubber and fabric. In general, it is formed by three layers(1+2=2layers of rubber and 1 layer fabric)

Product Detail

Product Tags

Culvert Construction Inflated Rubber Balloons, pneumatic rubber balloon

Pneumatic tubular form 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).

We can produce the culvert balloon with different shape, please you can choose it as your project requirements.


Standard Specifications

Diameter: From0.2m to 3m
Total Length: From 1m to 28m
Other specification also available upon customer’s request.

Parameter Of Rubber Material

Items Index
Terence of Thickness, mm 3.2±0.2
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 -10~80
Appearance No cracks, no bubbles on the surface, the length of impurity 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

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





Attn.Pls We are supplier of Natural Rubber Mat with Tyre Fabrics Raw-Materials for making Airbags.


Operating instruction manual ARD inflatable rubber balloon

Using of rubber inflatable mandrel:

1. Put the inflatable mandrel into the mold–pull inflatable mandrel into steel reinforcement cage,and make the vertical joints upward

2. Start inflatable for mandrel

(1) Open the valve and inflatable air to setted press,then close valve

(2) Working press(See the sheet)

3. Fixed

(1)Because the inflatable mandrel will float upward when vibrated concrete,so you must fix up and down,and plus briquetting to overcome on buoyancy.

(2)For φ250mm mandrel,the normal stirrup spacing is 80cm. If the diameter increased,then the stirrup spacing will be reduced relatively.

4. Pouring of concrete

(1) The process of pouring of concrete is nearly same as solid constructed part

(2) Using high frequency plug-in vibrating rods from both sides at the same time vibrators can avoid the mandrel moving around

(3) The vibrating rod ends can not contact the mandrel, in case damaging the mandrel and leaking gas.

5. as the concrete component solidification then can empty gas from the cavity, pulled out the capsule.

6. Wash the mandrel,test pressure and inspect.Storage and maintenance of inflatable mandrel

A. After using,you need wash the mandrel cleanly with water; when don’t need to use,please storage the mandrel in the place of ventilated and dry,and don’t touch with oils, acids, alkalis

B. During the process of using on the spot,please must avoid touch with sharp hard objects.

C. Every time after pulling inflatable mandrel out the mold,please use brush(had better with nylon brush) and running water to wash, removing the concrete on surface in order to keep the mandrel clean.

D. If the mandrel leak gas and sealing film off,you can use grinding wheel to burnish at the place needed repair and then brush glue to cover the sealing film; for the damaged place of fiber, you should use tape to cover for repairing.

Application of culvert pneumatic rubber balloon



Q1. What is your terms of packing?
A: Generally, we pack our goods in inside environmental plastic bags and outside cartons. If you have legally registered patent,
we can pack the goods in your branded boxes after getting your authorization letters.

Q2. What is your terms of payment?
A: usually if the order money less than $1,000, need to pay for full money before producing, if it is more than $1,000, need that T/T 30% as deposit, and 70% before delivery. We’ll show you the photos of the products and packages,enough to keep your products qulity,great thanks! before you pay the balance.

Q3. What is your terms of delivery?
A: EXW, FOB, CFR, CIF, DDU….etc,main according to customer’s requirement,thanks!

Q4. How about your delivery time?
A: Generally, it will take 10 to 20 days after receiving your advance payment. The specific delivery time depends on the items and the quantity of your order.

Q5. Can you produce according to the samples?
A: Yes, we can produce by your samples or technical drawings. We can build the molds and fixtures.

Q6. What is your sample policy?
A: We can supply free sample if we have ready parts in stock, but the customers need to pay the courier cost.great thanks for your understanding.

Q7. Do you test all your goods before delivery?
A: Yes, we have 100% test before delivery,keep the quallity,don’t worry!

Q8: How do you make our business long-term and good relationship?
A:1. We keep good quality and competitive price to ensure our customers benefit ;
2. We respect every customer as our friend and we sincerely do business and make friends with them no matter where they come from.

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