The sand is lack in the western China, so preparing self-compacting concrete with low and middle strength with Super Fine Mountain Sand and Artifical Sand is necessary.

The comparison relation about concrete intensity grade standard have been talked about the advantages of high intensity concrete and main the differences from ordinary concrete have been given a brief introduction.

The discussion about the relation between the dispersity and the strength grade of cement;

Comparison of ASTM concrete compressive strength and China s concrete strength grade;

Effect of strength grade on flexural creep of early-age concrete with slag powder

Based on the difficulty analysis on the whole body casting of concrete beam and plate with different strength levels, it is necessary to take construction process planning into consideration.

The main problems existing in <The Test and Evaluation Standard of Concrete Strength>(GBJ 107-87)are:1)it is too loose and does not reach the design required strength class;2)the three methods which are adopted are of different strictness and they have unreasonable aspects.

construction and supervision,this paper discusses the method to control the concrete strength class strictly and poses the suitable control measure to reach the target of high quality concrete engineering.