Relative Durability Properties and Strengths of Mortars Containing Finely Ground Silica and Silica Fume

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Title: Relative Durability Properties and Strengths of Mortars Containing Finely Ground Silica and Silica Fume

Author(s): K. Ohno, and F. Alhara

Publication: Special Publication

Volume: 114

Issue:

Appears on pages(s): 815-826

Keywords: chemical attack; chlorides; compressive strength; silica; flexural strength; silica fume; Materials Research

Date: 5/1/1989

Abstract:
The effect of finely ground silica with a high specific surface of about 12 mý/g and 20 mý/g in mortar was compared with that containing silica fume. The dosage requirement of a high-range water-reducing agent to maintain a constant flow of fresh mortar was determined for 1:3 mortar containing 5 to 25 percent finely ground silica or silica fume as cement replacement. The compressive and flexural strengths of the mortar were investigated at different ages. Also, the resistance of mortar specimens to chemical attack and chloride penetration was determined. It was concluded that the use of finely ground silica was as effective as silica fume for improving quality of mortar.