Abstract：
According to the characteristics of concrete which composes of multi- components and multi-phases cement-based composite, the author proposes a new concept for designing more reasonably mix proportion of concrete, i.e., to formulate the summation of the volumes of cement paste, air, sand and gravel, among these, emphasizing the design of cement-based cementing paste and aggregates proportion in term of compactness-deposit principle. The study of continuous compactness-deposit grading has lead to extend the fullers formulae to five ones aiming at deferent density of concrete mixture. It is definite that every kind of density has basically a stable gravel amount, but the sand rate must be changed along with the amount of cementing paste no matter what kind of concrete. Therefore, the popular domestic design method of concrete mix proportion,which makes the sand ratio as the major parameter， has been changed into the new one of making the paste and gravel amount as the major parameters.
