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.
Type |
Recommended Addition Amount |
Fiber Specification Recommendations |
|---|---|---|
|
General residential floor slabs |
20-30 kg/m³ |
Length 30-50mm, Diameter 0.5-0.75mm |
|
Basement Floating Resistant Floor Slabs |
30-40 kg/m³ |
With end hook type, L/D ratio ≥ 65 |
|
Ultra-thin floor slab (≤100mm) |
35-45 kg/m³ |
High strength type (≥1200MPa) |
Uniformity control: give priority to the use of special fiber disperser casting, strictly prohibit artificial throwing;
Strength suitability: concrete grade ≥ C25, fiber tensile strength ≥ 1000MPa;
Economic threshold: the cost-effectiveness needs to be reviewed when the added amount >45kg/m³.
1.Feeding order: gravel → cement → 60% water → steel fiber (put in 3 batches) → remaining water;
2.Mixing time: forced mixer ≥ 3 minutes, fiber without agglomeration is regarded as qualified;
3.Collapse degree: it should be controlled at 160-180mm, too large easily lead to fiber settlement.
1.Layered pouring: single layer thickness ≤ 200mm, vibrating rod fast insertion and slow lifting;
2.Prohibit over-vibration: vibration time ≤ 15 seconds / point, to avoid fiber sinking aggregation;
3.Surface treatment: secondary polishing before initial condensation, pressing into the exposed fiber.
1.Moisture preservation and maintenance: cover with plastic film within 6 hours after pouring, continuous maintenance ≥ 7 days;
2.Timing of cutting joints: cut shrinkage joints (depth ≥1/3 slab thickness) when the concrete strength reaches 5MPa.
Cost analysis: adding 30kg/m³ steel fiber increases the cost by about 40 RMB/m², but saves 25 RMB/m² of rebar tying cost and shortens the working period by 20%;
Life cycle: floor wear resistance is increased by 2 times and crack repair costs are reduced by 60%.
By standardizing the application of monofilament steel fibers, it is possible to achieve a thinning of 10-15% in residential floor slabs, while upgrading the crack resistance level to L-III (crack width ≤ 0.2mm).It is recommended that test blocks be verified before construction to ensure that the fiber dispersion is ≥90%.
TenaBrix® es una marca para los productos de fibra y derivados de Michem. Nuestros productos TenaBrix® incluyen microfibras sintéticas de polipropileno, macrofibras sintéticas de polipropileno, fibras fibriladas de polipropileno y otros tipos de fibras.
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