... the following reasons: A, The none circular and irregular section of this PVA fibers helps expanding PVA bonding surface with cement ... .(2) Resistant to acid, can be used in different grade of cement.(3) Dispersive, maintains the material surface smooth without peeling ... ’s usage(1) Strengthening the concrete of the buildings, such as cement board, sewer, positive view of the ground, parking lot etc.(2 ...