The object of this research effort was, upon request for
evidence from a building contractor, to compare the influence of various
amounts and types of fibers on crack widths, using a steel ring mold.
Comparisons were made between synthetic fibers (polyolefin) of
 C. O. SØrensen, P. E. Saga and A. Østvold, “Factors Affecting Fiber Distribution in Concrete and the Efficiency of Fibers on Crack Reduction,” Institute of Mathematics and Technology Report No. 47/2012, The Norwegian University of Life Sciences, Aas, 2012.
 Norm Tec AS, 2007. www.normtec.no
 S. A. Bekaert, 2012. www.bekaert.com/building
 E. ?sgür and K. Marar, “Effect of Steel Fibers on Plastic Shrinkage Cracking of Normal and High Strength Concretes,” Department of Civil Engineering, Eastern Mediterranean University/European University of Lefke, North Cyprus, 2010.