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Engineering Properties of Fiber-reinforced and Polymer-impregnated Shotcrete.
Poad-ME; Serbousek-MO; Goris-JM
NTIS: PB 240 695 :25 pages
Structural properties of steel-fiber-reinforced shotcrete and polymer-impregnated shotcrete, both plain and fiber-reinforced, were investigated by the federal Bureau of Mines, Spokane Mining Research Center. The research center has found that flexural strengths can be increased by as much as 106 percent, and splitting-tensile strength by 50 percent, by introducing randomly oriented steel fibers. A slight decrease of compressive strength was found in the fiber-reinforced shotcrete. Polymer-impregnated shotcrete exhibited a threefold to fourfold increase in compressive and splitting- tensile strength. The techniques of preparing shotcrete with the dry process, using both fast-set agents and regulated-set cement, are described, along with the results of physical-property testing. Flexural strengths for plain and fiber-reinforced shotcrete are also reported. Steel-fiber shotcrete is the more promising of the new structural materials for ground support, and additional research is recommended.
IH; Report of Investigations
NTIS Accession No.
NTIS: PB 240 695
Page last reviewed: September 2, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division