We can supply the pp fiber for concrete and this kind of fiber has been used to build high way, bridge in china .the following is the information about our produce:

Chemical and physical properties
 Color: white Shape: Bunchy monofilament
 Diameter: 31μm

Specific Gravity: l 0.91g/cm3
 Melt point: 165-170

Ignition points: 590l
 Elongation at break: 30%  
 Fiber length: 3mm,6mm,9mm,12mm,18mml
 Tensile strength :≥400MPa440CN/dtex
 Elastic Modulus :≥4.0GPa (4400l CN/ dtex)
 Alkali, Acid & salt resistance: high  
 Electrical and thermal conductivity: low 
 Security: safe & nontoxic

Product use
  Mixing designs and procedures: PP fiber reinforcing is a mechanical, not a chemical process. 
  The PP fibers may have an effect on slump. The use of other admixtures may be necessary to maintain both slump and workability. Boning PP fibers are added to the mixer after batching the other concrete materials, before the addition of water. Mixing time should be a little longer than that without the addition of fibers