Theoretical calculation method for preparation of common concrete

The invention relates to a theoretical calculation method for preparation of common concrete. The experiment result of artificial sand screening in unit weight is recorded in the experiment that B%/A%is 1.15mm or above artificial sand/1.15mm or below artificial sand; the fine river sand is mixed with the same volume of 1.15mm or below artificial sand, the ratio of the fine river sand is shown inthe attached figure, and the apparent density of the mixed sand is roua=roub*rouc/(roub*C1%+rouc*a1%); the bulk weight of concrete is y%/d+(1-y%)/d(rou0)=1/D; the usage amount of aggregate is E=D-(C+F)-W; the usage amount of aggregate is E=X+S+G=Q*X. The concrete which is prepared by the theoretical calculation method has the advantages that the fluidity is realized, the strength is high, the porosity in concrete is smaller, the construction property is good, and the durability is higher. 本发明涉及种普通混凝土配制理论计算方法，实验记录单位重量人工砂筛分实验结果：B％÷A％＝1.15mm颗粒以上人工砂÷1.15mm颗粒以下人工砂；细河砂与同体积1.15mm颗粒以下人工砂混合，细河砂占的比率：混合砂的表观密度：ρ＝ρ×ρ÷(ρ×C1％+ρ×a1％)；