減水剤を用いたコンクリートの諸性質に関する研究(セメントを減量した場合の影響)

概要

論文の詳細を見る
To exmamie the effect of reduced cement content upon the properties of concrete containing admixtures, as in the air-entraining agent, five water-reducing admixtures, for water reducing-set controlling admixtures, and five brands of normal portland cement have been selected and used with some combination. Comparative tests have been performed of fresh concrete with respect to its water-reduction, bleeding, time of initial and final setting, and of hardened concrete with respect to its strength gain concretes with the above-mentioned admixtures with cement contents of 260, 280 and 300 kg/m^3, were prepared and compared with the control concrete having the cement content of 300 kg/m^3 and same consistency of 7.5 cm without admixtures. The results of the test show that the good quality of water-reducing admixtures can reduce water requirement by 10 to 15 percent, irrespective of the cement contents, and that the strength gain, the time required for setting and bleeding are affected by reduction in cement contents, and by the quality of water-reducing admixtures.
社団法人日本材料学会の論文
1969-05-15