フレッシュコンクリートの粘塑性せん断変形挙動に関する理論的考察

概要

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This paper presents a microscopic approach to visco-plastic shear deformation of fresh concrete. By using a shear box testing apparatus, the shear deformation characteristics and the effects of stress duration and compressive stress on the shear plane are experimentally investigated for glass bead assembly and fresh concrete. Then, after the occurrence probabilities of moving particles are examined for cohesionless particle assembly and adhesive particle assembly, the shear deformation behavior of cohesionless particle assembly and adhesive particle assembly is clarified. Furthermore, the mathematical expressions of shear strain and shear strain rate are induced for fresh concrete, which is considered as a kind of particle assembly containing water, adhesive particles (cement particles) and cohesionless particles (aggregate particles). And the influences of normal stress on the shear plane and stress duration on the shear behavior of fresh concrete are quantitatively discussed, and it is clarified that obtained theoretical results are consistent with the experimental ones.
社団法人日本建築学会の論文
2003-02-28