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RepairUndergroundStructuralSilica Fume in Shotcrete

John Wolsiefer, Sr., and Dudley R. Morgan

Silica fume is a highly pozzolanic mineral admixture that has been used mainly to improve concrete durability and strength and as portland cement replacement. Silica fume has been used primarily in the United States, Canada, and the Scandinavian countries, but is now finding increasing use