Title:
Steel Fibrous Shotcrete: A Summary of the State of the Art
Author(s):
Charles H. Henager
Publication:
Concrete International
Volume:
3
Issue:
1
Appears on pages(s):
50-58
Keywords:
fiber reinforced concretes; fibers; linings;
metal fibers; mines (excavations); mix proportioning;
placing; reviews; shotcrete; slope protection;
DOI:
Date:
1/1/1981
Abstract:
This report describes the technology and uses of steel fiber reinforced shotcrete, a material containing up to 2 percent by volume of steel fibers. The fibers are on the order of 1 in. long by 0.016 in. diameter (25 mm x 0.4 mm). Mechanical properties, particularly ductility, toughness, and flexural strength, are improved by the fiber addition and these improvements are described along with other typical properties and proportions of typical mixes. Batching and mixing methods and application procedures are described, including methods of reducing rebound, special equipment developed for applying fibrous shotcrete, and modifications used with conventional equipment, Applications of steel fibrous shotcrete in the U.S., Europe, and Scandinavian countries are described. These include rock slope stabilization work, construction and repair of mine and tunnel linings, and bridge arch strengthening. In applications where the fibers can be used to replace steel mesh, the material has resulted in savings in construction time and cost.