Question

Self-fibrillating synthetic fibers have become a more common component of which common building material?

Answer

Fibers made of glass, carbon, steel, nylon, and polypropylene are being used in concrete to minimize plastic-shrinkage in slabs-on-grade. These fibers are about 2 inches (five centimeters) long. The self-fibrillating types start off straight but will fray when mixed in concrete.