PP Microfiber for Construction Crack Resist

PP Microfiber for Construction Crack Resist

In the field of building crack resistance, microfibers with their stable physical properties and micro-strengthening mechanism, have become innovative materials for improving the durability of concrete. This kind of fiber is made from polypropylene as raw material and processed into extremely fine monofilaments through a special technique. After being mixed into concrete, a three-dimensional random distribution network is formed, effectively inhibiting the initiation and expansion of plastic shrinkage and dry shrinkage cracks. Its advantage enables tens of millions of fibers to be evenly dispersed in each cubic meter of concrete. Even if micro-cracks occur, the bridging effect of the fibers can significantly reduce the crack width (by more than 60%), while improving the impermeability and impact strength. Compared with traditional fibers, polypropylene micro fibers hardly increase the viscosity of the mixed materials, ensuring fluidity during the construction process. In addition, after surface modification treatment, the adhesion to the cement matrix can be enhanced. Polypropylene microfiber is suitable for high-precision flooring, ultra-thin structural layers, and crack-sensitive projects. 

Polypropylene microfiber concrete fiber parameters:

Applying instruction of pp micro fiber concrete fiber :

◆Length of polypropylene  pp monofilament fiber:

Fine aggregate concrete such as mortar is suitable for polypropylene micro fiber length less than 12mm, and coarse aggregate concrete is suitable for concrete above 12mm.

◆Compounding Amount:for resisting the common cracks on surface,0.9kg/m ³fibers to cement mortar are enough.

◆Ratio and mixing requirements:the proportion of cement,sand and aggregate is no need to be changed.Put cement,aggregate,additive and fiber together,then stir after adding enough water and time for stirring can be prolonged for 2-3 minutes in order to make the compound mix completely.Also it can be mixed even with cement and other aggregates in advance,stirring by adding water at worksite before constructing.

Key points for the construction of monofilament fibers(pp micro fiber)：

◆Uniformity of dispersion

Dry-mixing method: First, dry-mix the pp micro fibers with aggregates and cement, then add water and stir (extend the time by 15 to 30 seconds).

Wet mixing method: Concrete fibers are slowly added to the already mixed concrete to prevent clumping.

◆Mix ratio adjustment

Appropriately increase the dosage of water reducing agent to compensate for the decrease in fluidity caused by the addition of fibers.

◆Maintenance requirements:

Just like ordinary concrete, it is necessary to ensure adequate wet curing to prevent early cracking.

Practical cases of polypropylene PP micro fiber:

◆A certain expressway pavement was doped with 0.9 kg/m³ PP monofilament fibers, reducing the crack incidence rate by 60% and extending the service life by 8 to 10 years

◆The industrial floor uses PP fiber concrete, which enhances its resistance to sulfate erosion by three times and extends the maintenance cycle from two years to six years

 PP Microfibers applications:

◆polypropylene micro fiber is suitable for the water-proof layer, floor, inner & outer wall of industrial and civil construction.

◆Polypropylene fiber is used for surface cracking resistance and enhancement treatment of  industrial workshop, warehouse and parking lot.

◆Increase cracking & seepage resistance of the ground in natatorium, swimming pool, pond and ditch.

◆Polypropylene micro pp fiber is suitable for any mortar projects and fine aggregate concrete projects.

◆Prefabricated components and prefabricated buildings.

Customer evaluation:

About us:

Shandong Luke composite Co., Ltd is a professional company on production and sales engineering anti-crack fiber.Concrete anti-crack fiber series such as polypropylene fiber、pp monofilament fiber(polypropylene micro fiber) 、polypropylene mesh fiber、PAN fiber、high strength and high modulus polyvinyl alcohol fiber(PVA),water-soluble polyvinyl alcohol fiber、curved pp macro fiber、twisted bundle pp fiber、steel fiber etc.

Professional equipment, high quality polypropylene fibers series products, is your best choice, welcome to our company!

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