Studies of Shotcrete Using Utra Rapid Hardening Cement, Steel Fiber, and Silica fume

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Title: Studies of Shotcrete Using Utra Rapid Hardening Cement, Steel Fiber, and Silica fume

Author(s): Yoshihisa Masuda, Yoshio Uchida, and Yoshiki Tanaka

Publication: Special Publication

Volume: 128

Issue:

Appears on pages(s): 201-216

Keywords: bonding; cement dust; cements; durability; metal fibers; mix proportioning; shotcrete; silica fume; Materials Research

Date: 11/1/1991

Abstract:
In this study, the authors investigate shotcrete that is reinforced with steel fibers and partly substitutes ultra rapid hardening cement with silica fume. The results verified that the optimum substitution percentage was to be about 10 percent. The substitution improved bond strength at joints as well as bond strength between steel fibers and concrete at an early age, and silica fume substitution also reduced the dust concentration. It was found that the surface moisture content of fine aggregate should be greater than 4 percent to obtain the expected effect.