Title:
Physical and Mechanical Properties of Steel-Fiber Reinforced Dry-Mix Shotcrete
Author(s):
Hugo S. Armelin and Paulo Helene
Publication:
Materials Journal
Volume:
92
Issue:
3
Appears on pages(s):
258-267
Keywords:
fibers; mechanical properties; shotcrete; Materials Research
DOI:
10.14359/1118
Date:
5/1/1995
Abstract:
Dry-mix shotcrete reinforced with various contents of four different types of steel fibers was tested to evaluate in situ fiber content, fiber orientation, and their influence on mechanical properties, compressive and tensile strength, modulus of elasticity, and post-crack reinforcing ability. Theoretical models are proposed and tested to asses fiber-loss and fiber orientation inside shotcrete. The results indicate that although dry-mix shotcrete has some very distinct characteristics compared to the cast concrete matrix (high-cement content, water-cement ratio below 0.35, high voids-volume, tendency for fiber two-dimensional orientation, unknown in situ fiber content), SFRS is somewhat similar to the unreinforced dry-mix shotcrete matrix with respect to mechanical properties up to the first crack. After this point, its reinforcing ability appears to be dependent not only on fiber type and content but also on the set- accelerator admixture and fiber orientation.