ダブルミキシングで製造したコンクリートの圧縮強度
1989 年 1989 巻 408 号 p. 139-146
詳細
1989 年 1989 巻 408 号 p. 139-146
Concrete manufactured from cement paste prepared by double mixing (DM) under the optimum deviding proportion of water, exhibited higher strength and yielded less bleeding than those observed for concrete of the same mix proportion prepared by conventional mixing (SM). In order to explain this effect, several series of experiments and FEM analysis of model concrete were conducted. Based upon the observations such as positive corelation between compressive strength and bleeding, crack propagation initiated from the artificial bleeding flaw provided under coarse aggregate and strength reduction enhanced with increasing size of aggregate etc., GEM (Gravel Enveloped with Mortar of low bleeding) model is proposed in stead of the original model named as SEC (Sand Enveloped with Cement).
