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المنتجات
قائمة الطعام
PP Fibers For Shotcrete
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The Advantage of PP Fibers in Shotcrete
ألياف TenaBrix® للخرسانة المسننة التي تتوافق مع ASTM C 1116، المواصفات القياسية للخرسانة المسننة المقواة بالألياف، وتستخدم خصيصًا للتحكم في التشقق الناتج عن انكماش البلاستيك وتخفيفه، وزيادة متانة السطح والصدمات ومقاومة التآكل.
توفر منتجات TenaBrix® بما في ذلك الألياف الاصطناعية الكبيرة/الصغيرة تقوية ثلاثية الأبعاد للتطبيقات فوق الأرض وتحت الأرض.
Scope of application
In shotcrete, PP fiber can effectively inhibit plastic shrinkage cracks and improve structural integrity, especially for tunnel lining, slope support and other projects.
Recommended amount of polypropylene fiber added
Type of project |
Recommended Addition Amount |
Fiber Specification Recommendations |
|---|---|---|
|
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!
Recommended Polypropylene Fiber
FAQ
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.