The purpose of this paper is to investigate the adaptability of regression function for concrete mix proportioning. The survey of actual mix proportions on four types of normal weight concrete with nominal strength 210kg / cm^2 were obtained through questionnaires sent to 220 plants of ready mixed concrete all over Hokkaido. In previous paper, it was shown that the adaptability of mix proportioning in accordance with JASS 5 Reinforced Concrete Work and Concrete Mix Guide of AIJ was not enough to the survey mixes. In this paper, a multiple regression analysis containing many independent variables on concrete materials characteristics tested daily for acceptance inspection or quality control at ready mixed concrete plant and district characteristics including plant property was applied to the survey mixes. The result of analysis shows that two regression functions that the dependent variables were unit water content and particle surfase modulus of fine and coarse aggregate to be used were able to estimate closely unit content 1 / m^3 of each material in the observed mixes.
北海道の生コンクリート工場の実施配合値に対する重回帰分析
kiyo36_rikou_pp91-104.pdf
(1.53MB)
