Polypropylene synthetic microfibers for Residential Slabs

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Polypropylene synthetic microfibers for Residential Slabs

The Advantage of Polypropylene Synthetic Microfibers

Las losas de hormigón residenciales pueden beneficiarse del refuerzo tridimensional que proporcionan las microfibras sintéticas de polipropileno TenaBrix®.

Tanto las microfibras monofilamento TenaBrix® como las microfibras fibriladas TenaBrix® pueden añadirse a los forjados residenciales para aumentar la durabilidad del hormigón y reducir las grietas en aplicaciones exteriores e interiores.

Las microfibras monofilamento TenaBrix®, diseñadas específicamente para ayudar a mitigar la formación de grietas por retracción plástica en el hormigón, permiten que éste desarrolle su integridad óptima a largo plazo y aumentan su robustez.

Microfibras fibriladas TenaBrix® Aumentan la durabilidad de la superficie y la resistencia al impacto y a la abrasión en comparación con el hormigón liso.

Polypropylene synthetic microfibers Content in Residential Slabs

Application scenario	Importe de adición recomendado	Tipo de fibra
Forjados residenciales generales	0.6-0.9 kg/m³	Fibra monofilamento de polipropileno
Underfloor Heating Floor	0.9-1.2 kg/m³	Alkali-resistant polyester fiber
Ultra-thin floor slabs (<10cm)	1.0-1.5 kg/m³	Tipo de alta resistencia (≥1200MPa)

Note:

The specific dosage needs to be verified by laboratory trial mixing, and the concrete mixing ratio and construction environment need to be considered.

Construcción Consideraciones clave

Mixing process

1.Priority is given to the dry mixing method: fiber+aggregate dry mixing for 30 seconds → cement/admixture mixing for 30 seconds → water mixing for ≥ 2 minutes.
2.It is forbidden to put wet material directly to avoid fiber agglomeration.

Construction Points

1.The vibration time is extended by 10-15 seconds to ensure uniform fiber distribution.
2.The timing of plastering needs to be advanced: finish before the first set (fibers accelerate the loss of water from the surface)
3.Avoid excessive wiping to cause fibers to float

Specialized environmental response

1.When the wind speed is >5m/s or the temperature is >30℃:
✓ Immediately cover with plastic film to retain water
✓ Add 15-20% more
2.Winter construction: low-temperature-resistant modified fiber (-20 ℃ does not break)

Statement

Non-structural reinforcement: fibers only inhibit early cracking, not a substitute for structural reinforcement
Compatibility verification: compatibility test is required when used with water reducing/expansion agents.
Economy suggestion: the standard floor slab of high-rise residential building adopts 0.7kg/m³ with the best cost performance.

Aplicaciones típicas:

Calzadas
Aceras
Cubiertas

Patios
Fundaciones

Fibra de acero recomendada

Microfibra sintética de polipropileno

Macrofibra sintética de polipropileno

PREGUNTAS FRECUENTES

Fiber clusters appear on the surface

Reason:Insufficient mixing time or incorrect order of feeds.
Solution:Extended mixing time with forced mixer.

Exposed fibers after plastering

Reason:Excessive wiping or late harvesting of light.
Solution:Completion of plastering before initial setting, using a steel trowel for one-way finishing.

Localized cracking of the floor

Reason:Uneven fiber dispersion or inadequate maintenance.
Solution:Strengthen the vibration, cover the maintenance film immediately after the final set.

Fluctuation of strength test value

Reason:Fibers affect sampling representativeness.
Solution:Core drilling to avoid dense rebar areas and compare the same batch of test pieces.