Polypropylene synthetic microfibers for Residential Slabs

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Polypropylene synthetic microfibers for Residential Slabs

The Advantage of Polypropylene Synthetic Microfibers

As lajes de concreto residenciais podem se beneficiar do reforço tridimensional fornecido pelas microfibras sintéticas de polipropileno TenaBrix®.

As microfibras monofilamentares TenaBrix® e as microfibras fibriladas TenaBrix® podem ser adicionadas a lajes residenciais para aumentar a durabilidade do concreto e reduzir a fissuração em aplicações externas e internas.

As microfibras monofilamentares TenaBrix®, especificamente projetadas para ajudar a mitigar a formação de fissuras por retração plástica no concreto, permitem que o concreto desenvolva sua integridade ideal a longo prazo e aumente a robustez.

As microfibras fibriladas TenaBrix® aumentam a durabilidade da superfície e a resistência ao impacto e à abrasão quando comparadas ao concreto simples.

Polypropylene synthetic microfibers Content in Residential Slabs

Application scenario	Valor de adição recomendado	Tipo de fibra
Lajes de piso residenciais em geral	0.6-0.9 kg/m³	Fibra de 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 resistência (≥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.

Principais considerações sobre a construção

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.

Aplicações típicas:

Estradas de rodagem
Calçadas
Decks

Pátios
Fundamentos

Fibra de aço recomendada

Microfibra sintética de polipropileno

Macrofibra sintética de polipropileno

PERGUNTAS FREQUENTES

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.