Lijie polypropylene fiber is a short-cut fiber made of polypropylene resin added to masterbatch, blended, spun, stretched, and anti-static and UV-resistant special processes. It is a special fiber for concrete and mortar.

Product Related

Lijie polypropylene fiber can effectively control the cracks in concrete and mortar caused by shrinkage, dry shrinkage and temperature changes, greatly improve the anti-cracking and anti-seepage performance, anti-abrasion performance, increase the toughness of concrete, and thus improve the service life.

It is mainly suitable for:

1. Anti-cracking and anti-seepage mortar for industrial and civil buildings;

2. Basements and underground projects with high requirements for anti-cracking and anti-seepage, seawalls and dams and other salt water projects

3. Various precast concrete products

4. Concrete for highways, bridges, tunnels, airport runways, etc.;

5. Chemical plants with high requirements for alkali resistance and chemical corrosion.

Principle:

Lijie polypropylene fiber can be evenly distributed in concrete after special anti-static and anti-ultraviolet treatment. Its fiber trilobal cross-section increases the specific surface area of the fiber. The fiber is rough and porous after chemical grafting and physical modification, so it greatly improves the bonding force with cement. Because the fiber is very fine, there are 20 to 45 fibers per cubic centimeter, which can form a random support system, effectively control the early plastic shrinkage and shrinkage of concrete and mortar to form cracks, hinder the formation of settlement cracks, and greatly improve the impermeability, impact resistance, toughness and wear resistance, thereby achieving the purpose of extending the life of the building.

Physical properties and important parameters of the product:

Material: 100% modified polypropylene

Melting point: 165¡ãC¡« 175¡ãC

Breaking strength ¡Ý450Mpa

Flashing point: 590¡ãC

Breaking elongation: 15%¡«20%

Acid and alkali resistance: strong

Elastic modulus£¾3500mpa

Fiber length: 3mm, 4mm¡­50mm (according to customer requirements)

Cross-sectional shape: Y-shaped or round

Density: 0.91g/cm3

Suggested dosage: 0.6¡«1.0 kg/m3 Concrete with special requirements can reach 1.8kg/m3

Advantages and process of Lijie polypropylene fiber

Product advantages

The most effective way to solve the non-structural shrinkage cracks in concrete is to add secondary reinforcements to the concrete to enhance the tensile strength of plastic concrete. The fibers commonly used for secondary reinforcements in concrete are: asbestos fiber, glass fiber, steel fiber and synthetic fiber. But among them:

Asbestos fiber has been found to be carcinogenic to the human body and has been banned internationally.

Glass fiber has poor alkali resistance. Although alkali-resistant glass fiber has changed its alkali resistance, its effect cannot last after testing.

Steel fiber has the problems of large addition amount, high cost, complex operation, and the need for a special construction technical team, which also aggravates the wear and tear of the machine.

Therefore, modified polypropylene synthetic fiber is the most ideal material for secondary reinforcements in concrete. Its advantages are: good dispersibility, high bond strength; random distribution, secondary reinforcement; physical reinforcement, crack resistance and reinforcement; anti-magnetic, rust-proof, anti-corrosion and alkali-resistant; non-toxic and tasteless, high safety; simple construction, economical and reliable;

¡ôConstruction process

Recommended dosage: add 0.6-1.0 kg fiber per cubic meter of mortar/concrete, and increase to 1.8 kg for concrete with special requirements. (Such as bridge deck pavement dosage: 1.2 kg/cubic meter)

Mixing time: When making fiber mortar/concrete, the mixing time should be appropriately increased by 30-60 seconds, and commercial concrete does not need to be extended.

Operation procedure: add water ¡ú add fiber ¡ú stir ¡ú add aggregate ¡ú add cement ¡ú add water.

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