コンクリートポンプの管内圧送圧に関する研究 : その 2・実際のポンプを用いた圧送実験 (主として軟練りコンクリートについて)

概要

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This paper describes the field tests which were carried out for purpose of getting technical data and confirming the theory on the pumping pressure presented in Part 1. The synthetic lightweight aggregate concrete and the ordinary concrete of various mix proportions were pumped through the pipelines with diameters of 2", 3", 4", 5" and 6". The pressure of concrete in pipelines was measured at several points and pumping speed was also obtained by measuring the flux of concrete at the discharge end. Three kinds of squeeze-type pump and one kind of piston-type pump were used. The maximum length of the vertical and horizontal pipeline were 30m and 54m resectively. The results were as follows : (1) The adequacy of the theory presented in Part 1 was confirmed. (2) The distance that concrete can be pumped varies with the capacity of pump, the diameter of the pipe, type of aggregate, mix proportion, the flow speed of concrete in the pipe and other factors. (3) The technical data were obtained by which pumpability of concrete under various conditions at job site can be estimated.
社団法人日本建築学会の論文
1970-12-30