Quality evaluation method of silica fume for high strength concrete

摘要

PPROBLEM TO BE SOLVED: To provide a quality evaluation method of a silica fume for a high-strength concrete which simply and intuitively evaluates the dispersibility of the silica fume in a premise for manufacturing the high-strength concrete. PSOLUTION: A sample slurry is manufactured by kneading the silica fume having a water-powder ratio of 350-450%, water and a water reducing agent of 3 wt.% or more and less than 5 wt.% relative to the silica fume. A viscosity of the sample slurry is measured by using a viscosity measuring instrument as an inexpensive and highly portable rotation viscometer. The dispersibility of the silica fume can be simply and intuitively evaluated in the premise for manufacturing the high-strength concrete. PCOPYRIGHT: (C)2011,JPO&INPIT