実機ミキサにより練り混ぜた高強度・高流動コンクリート中のモルタルの単位容積質量及び単位粗骨材量の差に関する一考察

概要

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The JIS A 1119, testing method of differences in mortar and coarse aggregate content in concrete mixed with a concrete mixer, has been used as a mixing performance test of mixers. In this paper, applicability of JIS A-1119 to high-strength and high-fluidity concretes is examined taking into account other mixing performance tests such as JIS A 5308 and JIS A 8603. High-strength and high-fluidity concretes, with various cement types and water-cement ratios, were mixed with a full-scale mixer under summer, normal and winter conditions. Differences in unit mass of mortar and unit coarse aggregate content in the concrete were examined and the compatibility with specified values of JIS A 8603 was studied. As a result, it was found that JIS A 5308 can be applicable to high-strength and high-fluidity concretes and compatible to the specified values of JIS A 8603.
2006-05-30