Abstract: Tensile strength and compressive strength are common strength indexes of concrete. Tensile strength can be measured by direct tensile test, three point bending test, and tensile splitting strength test; and compressive strength measured by cube compressive strength test. Fully-graded large specimens and wet-screened small specimens are typical forms used in dam concrete material test. Certain statistical relationships exist between strength indexes of concrete specimens with different sizes under tests of different types. This paper summarizes static and dynamic test results of fully-graded concrete and wet-screened concrete considering concrete materials in actual dam projects, including examination on the rate effect and size effect of concrete strength and analysis on the quantitative relationships between different strength indexes. The results are compared with previous studies in literature and they would provide significant information to design of actual projects.