人工軽量コンクリートの施工法に関する研究
1966 年 15 巻 157 号 p. 724-732
詳細
1966 年 15 巻 157 号 p. 724-732
This report includes the experimental study of following problems.
(1) When the density of coarse aggregate is low, artificial lightweight aggregate concrete is easy to segregate during its consolidation or transportation.
(2) As the result of (1), more defects or cold joints are apt to form than in the case of ordinary aggregate concrete.
(3) There is a tendency that big air bubbles remain on the concrete surface, and when the frame boards are removed they carry off part of the concrete with them leaving its surface in rough appearance.
With respect to (1), the degree of segregation of coarse aggregate under various mixing conditions was investigated by letting concrete run down a short oblique chute.
Concerning (2) and (3), the cause of these phenomena was pursued from both mixing and consolidating conditions, and the method to prevent them was found to some degree.
