国产精品九九久久_各种姿势撞击律动h_开车污的句子秒湿爆水_国产精品女a片爽爽免费视频

Polypropylene mesh fiber effect:

     1 to prevent concrete cracks
     2 improved penetration resistance of concrete
     Three freeze-thaw resistance of concrete to improve performance
     4 improve concrete impact, bending, fatigue, seismic performance
     5 to improve the durability of concrete, anti-aging
     6 to improve the fire resistance of concrete

Polypropylene mesh fiber is mainly used in:
Concrete pavement, bridges, airport runways, factory floors and other projects that require high crack resistance 

Using special methods of construction engineering tunnels, mine walls, roof, cisterns, etc.
Rivers, dams and other projects; military protection works, dock revetments, piers, etc.

Polypropylene mesh fiber parameters:

Fiber type mesh fiber diameter 100 ± 50 μm
Tensile strength ≥ 450MPa length of 12-20mm
Ultimate elongation ≥ 10% Melting point 160-170 ℃
Elastic modulus ≥ 3500MPa security, non-toxic
0 .91g/cm acid alkaline high density