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المنتجات
قائمة الطعام
PP Fiber for Precast Concrete
- الصفحة الرئيسية
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- حلول المشاريع
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- مسبقة الصب
The Advantage of TenaBrix Fibers In Precast
تسمح إضافة ألياف TenaBrix® إلى الهياكل الخرسانية مسبقة الصب باستبدال الفولاذ التقليدي بالكامل في مجموعة متنوعة من التطبيقات، مثل خزانات الصرف الصحي، وأقبية الدفن، وحواجز جيرسي، وهياكل المرافق، وألواح توهين الصوت، وما إلى ذلك. يعمل TenaBrix® على تحسين كفاءة الإنتاج وخفض التكاليف بنجاح في جميع مراحل عملية المشروع.
استُخدمت ألياف TenaBrix® على نطاق واسع لتحل محل حديد التسليح الفولاذي، وتم اختبارها وإثبات صلاحيتها وفقًا لمعايير ASTM ومعايير الاتحاد الأوروبي لهذه التطبيقات.
How much pp fiber is added to precast concrete？
Typical range: The amount of PP fiber added to precast concrete is usually low, calculated by volume or weight:
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Volume dosage: 0.05% - 0.20%
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Weight dosage: 0.6 kg/m³ - 1.8 kg/m³ (the most common range is 0.9 kg/m³ - 1.2 kg/m³).
How to use PP fibers in precast concrete?
Fiber Options:
Types: Mainly monofilament fibers (long and thin, good dispersion), mesh fibers (bundled network, dispersion is relatively easy, not easy to agglomerate), the original fiber (ribbon, water dispersed into a fine filament).Monofilament or mesh fiber is commonly used in prefabrication plants.
Specifications: length (usually 12mm-19mm, commonly used 12mm or 19mm), diameter/equivalent diameter (denier), tensile strength, modulus of elasticity.Appropriate specifications should be selected according to the type of component, reinforcement density and mixing equipment.Fine fibers (high L/D ratio) usually have better dispersion and anti-cracking effect.
Certification: Choose the brand name products that comply with relevant standards (e.g. ASTM C1116, EN 14889-2) and have stable quality.
Add timing and manner:
Optimal Timing: After the aggregate is added, before the water is added, or at the beginning of the water addition. This is the most critical point.Adding at the dry mix stage allows the fibers to be more evenly dispersed during the subsequent addition of water.
Specific operation:Spread the weighed PP fibers evenly over the aggregate being mixed (avoiding a pile-up caused by dumping all at once).
In a forced mixer, dry mix the aggregate and fibers for about 30-60 seconds to ensure initial fiber dispersion.
Then add other powders such as cement and admixtures and dry mix for about 30 seconds more.
Finally, water and liquid admixtures (water reducers, etc.) are added and mixing is continued until uniform (usually 15-60 seconds longer than conventional mixing without fibers, depending on mixer efficiency and fiber volume).
Prohibition: Do not add fibers directly into water or wet concrete that has already been mixed, it is very easy to agglomerate.
Mixing requirements:
A forced mixer (vertical planetary, horizontal) must be used. A self-falling mixer cannot ensure uniform dispersion of the fibers.
Prolong the mixing time appropriately: Ensure that the fibers are fully dispersed and evenly distributed. However, it should not be too long to prevent fiber damage or increase in concrete temperature. Observe the state of the concrete and make sure there is no visible fiber agglomeration.
Mixing volume: Avoid mixing too little to ensure that the material has enough space to tumble and mix.
