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Nossos produtos TenaBrix® incluem microfibra sintética de polipropileno, macrofibra sintética de polipropileno, fibra fibrilada de polipropileno e outros vários tipos de fibras.
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PP Fibers For Shotcrete
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The Advantage of PP Fibers in Shotcrete
As fibras TenaBrix® para Shotcrete estão em conformidade com a ASTM C 1116, Standard Specification for Fiber-Reinforced Shotcrete (Especificação padrão para concreto projetado reforçado com fibra) e são usadas especificamente para controlar e mitigar rachaduras por retração plástica, aumentar a durabilidade da superfície e a resistência ao impacto e à abrasão.
Os produtos TenaBrix®, incluindo fibras sintéticas macro/micro, fornecem reforço tridimensional para aplicações acima e abaixo do solo.
Escopo de aplicação
In shotcrete, PP fiber can effectively inhibit plastic shrinkage cracks and improve structural integrity, especially for tunnel lining, slope support and other projects.
Quantidade recomendada de fibra de aço adicionada
Type of project |
Valor de adição recomendado |
Recomendações de especificação de fibra |
|---|---|---|
|
Conventional support |
0.9~1.2 kg/m³ |
12-19mm |
|
High anti-cracking requirements |
1.5~2.0 kg/m³ |
19~25mm |
|
Fireproof concrete |
2.0~2.5 kg/m³ |
25~40mm |
Note: The dosage shall be verified by trial mixing and shall not be substituted for structural reinforcement!
Fibra de aço recomendada
PERGUNTAS FREQUENTES
How can high fiber resilience be solved?
Check the wind pressure: too high wind pressure leads to rebound, adjust to below 0.5MPa.
Optimize the proportion: add micro-silica powder (3~5%) or cellulose ether to improve the bonding.
Optimize the proportion: add micro-silica powder (3~5%) or cellulose ether to improve the bonding.
What about exposed fibers on the surface of the spray coat?
Adjust the spraying angle to the vertical sprayed surface, and lightly press the surface with a steel trowel before final spraying.
If the mixing amount is >2.0kg/m³, it is necessary to increase the mortar protection layer (≥10mm).
If the mixing amount is >2.0kg/m³, it is necessary to increase the mortar protection layer (≥10mm).
What can I do about fibers causing blocked tubes?
Prevention: Use fibers with an L/D ratio of ≤ 100 (e.g. length 19 mm / diameter 0.03 mm).
Emergency: stop spraying immediately, clean the pipe with high-pressure wind, and strictly prohibit water injection!
Emergency: stop spraying immediately, clean the pipe with high-pressure wind, and strictly prohibit water injection!
Anti-cracking effect is not obvious?
Check the fiber dispersion: take the hardened concrete block and crush it, observe whether the fiber distribution is uniform.
Verify the accuracy of mixing amount: the error of each square of concrete should be <±0.1kg.
Verify the accuracy of mixing amount: the error of each square of concrete should be <±0.1kg.