close up view of bag with white light reinforcing additive polypropylene fiber reducing number of cracks in cement-sand floor

abstract addition background bag base building cement closeup concrete construction fiber fibers fibre fibrillated fibrillation filament finishing fluffy grey heap industrial industry layer macro management manufacture manufacturing material micro monofilament outdoor plaster plastic polyester polyethylene polymer polymeric polypropylene reduce reinforce reinforced reinforcement reinforcing sand stack structural supplement synthetic textile white