Cement concrete rib reinforcement-polypropylene monofilament fiber
Major functions of  monofilament fiber
（1） To be applied as concrete reinforcing material, and replace other approaches for the control of non-structural cracks, such as anti-crack reinforcing mesh
（2） Completely suppress the plastic shrinkage cracks
（3） Enhance the impact resistance.
（4） Increase the tenacity and ductibility
（5） Strengthen the water-resistant locomotivity, and improve the anti-seepage functions
（6） Enhance the anti-breaking capacity
（7） Enhance the abrasion-resistance capacity.
（8） Enhance the freeze-thaw resistance capacity.
（9） Improve the anti-fatigue performance, and provide the best durability
（10）Prevent and postpone the corrosions of main structural rib or steel plate, and improve the service life of structure
Applications of polypropylene fiber
Pavements and guard rails of highways and expressways: It is possible to enable the service life of pavements to extend 5-10 years, and substitute the anti-crack reinforcing mesh. Airport runway and parking apron: It is possible to fold increase the impact capacity of runway, reduce the debris caused by cracks at seam crossing, avoid the accident potential which may be caused by the suction of small debris into engine, and improve the safety of aircraft. Sprayed concrete at the wall surface and top of tunnel and mine revetment: The resilience and drop-off of concrete should not exceed 4-5%. The scope of application comprises dams, canals, tanks, water channels, swimming pools, ports, buildings along water. Reduce cracking, lower down the permeability and corrosion resistance. Concrete prefabricated panels, etc. It can enhance the binding property of concrete, and reduce the wear and tear. Composite floor in building constructions: It can enhance diversified indexes of buildings.
Major structure of bridge and deck: Avoid cracking and the unreliability caused by vibration, and protect the main ribs from being eroded.
Design principles and application ratio of polypropylene fiber
In principle, the affiliation of fiber in concrete should not change the designed mixing proportion of concrete. The affiliation is a kind of physical action other than chemical action. The affiliation of fiber has no impact on the application of other concrete admixtures, it does not lead to chemical reaction with any admixtures, and the functions of use will not be mutually affected.
The mixing amounts of fiber into concrete include three kinds,
Standard mixing amount is 0.9 kg (1 bag), high mixing amount is 1.8 kg (2 bags), and maximum mixing amount is 2.7 kg (3 bags). The above-mentioned mixing amounts should be applied according to needs of project performance.