This study has been conducted to manufacture cast-in-place high-strength concrete of which design compressive strength is 600kgf/cm2 (59 MPa), and to construct buildings by employing this concrete. The test results indicate that, in order to satisfy the design compressive strength, maintain good workability, and minimize the variation of the properties of freshly mixed and hardened concrete; 1) Water to cement ratio was adopted to be 28.5%, 2) A water reducing and retarding admixture was used, aiming at a slump of 23cm (9in.), 3) The quality of freshly mixed concrete was amply controlled. Based on the experimental data, this concrete was manufactured and then applied to a building, showing the satisfactory qualities
