Abstract
The aim of this study is to analyze various mechanical properties of 80MPa high strength concrete developed for the field application of super high-rise building. Expecially, for reducing hydration heat and increasing various mechanical properties, two mixtures by the binder types were mixed and tested. And, as the test item of 80MPa, fresh, hardened, shrinkage and durability properties were tested. The results of study are as follows; Fresh properties of concrete such as flowability and air content are satisfied with targetted standard. Especially slump flow 500mm approaching time is lower than 5 seconds because of fine viscosity. The 28day's compressive strength is higher than design strength regardless of concretes types. Tensile and flexural strength showed 1/15 and 1/8 of compressive strength. And the value of elastic modulus is above 40GPa. Durability properties of high strength concrete is extremely excellent. Three factors make the result like that. One factor is low water/binder ratio and second factor is the increase of hydration caused by high volume binder weight. And the final factor is that C-S-H gel originated by pozzolan reaction and latent hydraulicity of FA and BFS made inner organization closely.
