骨材の粒度分布がコンクリートおよびモルタルの流動性に及ぼす影響

概要

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The ultimate purpose of this study is to establish the method that can estimate the effect of aggregate grading on the fluidity of concrete. Therefore we focused on the size and grading range of aggregate, which are basic elements of grading, and clarified the relationships between them and consistency and rheology constants of mortar and concrete by experiment. By the way, in terms of reduction of drying shrinkage, autogenous shrinkage and hydration heat, it is important to determine the most appropriate grading which yields a given fluidity of concrete and maximum aggregate volume. To achieve this goal, we clarified based on the above experimental results that the aggregate volume ratio in concrete with a given fluidity was described mathematically by the distance of dispersion, solid content, maximum size and grading range of aggregate based on the excess paste theory.
2007-04-30