| Title |
Study of Strength Development of Ultra High-Strength Concrete |
| Authors |
Gong Min-Ho ; Jung Sang-Jin |
| Keywords |
Ultra High-Strength Concrete ; Compressive Strength ; Microstructure |
| Abstract |
Recently, more highly effective construction materials are needed for the reasonable and economical structure system is required as the construction structures become more multi storied, large-sized and diversified. That is to say, the highly qualified concrete, the most universal construction material is positively promoted as a part of plan to establish the effective space according to the dead load of structures and diminish of segment profile and to build up the economic structures. In particular, it is tendency of that the study for high strength concrete increases and construction example of reinforced concrete (RC) using the high strength concrete partially increases. However, the high strength concrete has the problems such high brittleness and low ductility. Specially, for the high strength concrete, it has different strength from normal concrete as the internal temperature goes up steadily due to high heat of hydration by the quantities of highly level of cement, so the concrete which is mixed with various miscible materials is used. The study about that mixing with the miscible materials affects what happens to the longitudinal physical property is not satisfactory. As the development and study for high strength concrete (more than 100N/㎟) is under way actively and the strength of high strength concrete increases, the strength different from the existing high strength concrete of less than 100N/㎟, but the study for this is not adequate and indefinite. In addition, the study and report to apply the strength expression and analysis results of internal structure. Therefore, this study is an experiment about using the miscible materials affects what happens to the longitudinal physical property. The fundamental data will be shown to understand the longitudinal icon of the future high strength concrete, which is possible to apply the initial strength concrete to the site by measuring the strength of hardened cement materials to constitute the high strength concrete with mortar specimen and the sequential histological changes of core structure. |