extreme close up, top down view of a mixture of polypropylene, filament micro fibers and steel, end hooked fibers for concrete

addition anticracking antifreeze background bars black bonding building bundle bundled close closeup concrete construction crack cracking durability end fiber fibers fibrillated fibrillation floor flooring hooked industrial industry iron macro material metallic micro monofilament pattern plastic polyethylene polymer polypropylene reinforced reinforcement reinforcing steel strengths structural supplement synthetic textured top view white