에코인공 경량골재를 사용한 고강도 경량콘크리트 보의 휨거동

High-strength lightweight concrete has economic advantages like to reduce costs by reducing the dead load of structure. But High-strength lightweight concrete have character of brittle failure. So such a character pose safety problem and it was difficult to apply easily at structures. These objectives of study are to examine that variables have influence on the flexural behavior of reinforced concrete members. In general, flexural strength and ductility of high-strength lightweight concrete beam are depending on the compressive strength of concrete and tensile steel ratio. In flexural test, nine high-strength lightweight concrete beams with three variables were tested to investigate flexural behavior and determine their flexural capacity. As a result of test, the flexural strength increases with the value of tensile steel ratio and cracking pattern is occurred rapidly. The ductility of high-strength lightweight concrete is lower than high-strength normal concrete about 75-88%. It is necessary to modify maximum steel ratio