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Twisted Bundle PP Fiber
Twisted Bundle PP Fiber

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Twisted Bundle PP Fiber is used to instead of steel fibre for reinforcement to cement concrete.Compared with steel fibre, it has

 

Main Technical Specification

Density(g/cm 3 )

0.91

Elastic Modulus (MPa)

>2600

Length(mm)

54+5

Equivalent Dia(mm)

0.5±0.1

Shape

bundle-like and twisted

Break tensile Ratio(%)

>15

Break Strength(MPa)

≥300

Resistance to acid,alkali

strong

Applying Instruction

1.Ration design of the fibre concrete
Generally the recommended amount to add to the concrete is more than 2.7kg per sqm (volume ratio is 0.3%), reinforce- ment adding amount is 5.5kg, Compared with adding 47kg of steel fibre, 5.4kg polymer fibre has the same volume ratio to the concrete.

2,Length
50mm for common crack-resistant requirement.

3,Matching Ratio
Usually it is no need to Change the matching ratio of the concrete.
Considering the requirement of fissure-resistant, the polymer fiber is recommend to combine with the polypropylene fiber- mesh with the volume ratio of 1:1 (0.9kg fiber-mesh to per sqm of cement concrete).

4,Mixer Adoption
Double-axle horizontal compelling mixer is priority.

5,Mixing process
Crushed stones, fibers and sands are put into the mixer in succession.After stirring for two minutes, fiber will fully spread and then add cement and water and stir normally. The addition of materials also can be put into as common concrete, but the stirring time should be properly prolonged to make fiber com- pletely mixed.

6,Shaping & Maintenance
There is no special requirement, may along the vibrating time for 30s, The maintenance of the fibre concrete should be done same as the normal concrete

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