コンクリートの破壊挙動に及ぼす粗骨材の影響 : 第 3 報特異点応力度による検討

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The purpose of this study is to examine the effect of coarse aggregate on fracture process of concrete. River graval, artificial lightweight aggregates, crushed limestone, sandstone and andesite, steel and glass balls were used for coarse aggregates. The variables of experiment were as follows : type, size and volume fraction of aggregate, and water-cement ratio of cement paste or mortar matrix. The following conclusions were obtained by this experimental study. 1) The stress at the proportional limit (σ_p) of stress-strain curve, the initiation stress (σ_<in>) and the critical stress (σ_<cr>) of concrete are affected by the compressive strength (F_<cc>) of concrete, the volume fractions of coarse aggregate in concrete (V_<ca>/V_<cc>), fine aggregate in mortar (V_<sa>/V_m) and cement in cement paste (V_c/V_<cp>), and the type of coarse aggregate. 2) The values of σ_p/F_<cc>, and σ_<cr>/F_<cc> for normal concrete and artificial lighweight aggregate concrete can be estimated by Eqs. (23)〜(25) and Eqs. (26)〜(28), respectively. Eqs. (23)〜(28) are applicable to calculate the values of σ_p, σ_<in> and σ_<cr> of mortar or cement paste by substituting zero for the values of V_<ca>/V_<cc> or V_<ca>/V_<cc> and V_<sa>/V_m, respectively. 3) The values of σ_p/F_<cc>, σ_<in>/F_<cc> and σ_<cr>/F_<cc> of concrete increase with the decrease of the modular ratio of coarse aggregate to mortar matrix, and the size (φ_a) of coarse aggregate.
社団法人日本建築学会の論文
1975-07-30

コンクリートの破壊挙動に及ぼす粗骨材の影響 : 第 3 報特異点応力度による検討

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