earticle

영어

Consumption of river sand has been remarkably increased due to lack of fine-natural river sand in current domestic construction site. Taking river sand in any matter human beings please, however, is found to be the major reason of coastal erosion and that of destroying habitats and an egg-laying site of oceanic life. Moreover, both of environmental development limitation and shortage of river sand are pushing further toward the difficulty in collecting an aggregate. As being faced problems with getting an aggregate, researches ―that are suggesting an alternative substitution which can be used instead of a natural aggregate― are now under way. According to the studies, it is required to extent the usage of steel slag. As a part of a basic research focusing on spreading the use of steel slag which is quick frozen with rapid air, this study is aiming for
suggesting a ground support from the Physical Properties of Mortar experiment. This experiment is formed that 6 ascending levels of steel slag replacement ratio-0, 20, 40, 60, 80, 100%, and 40 percent of water-cement ratio. Setting two opposite environment, one measured air content and table flow in liquid condition, and another measured compressive strength, tensil strength, and flextural strength in hardening condition. As a result of the experiment, getting higher level tends to show increased fluidity and decreased in air content at the same time. The other measurements-compressive strength, tensil strength, and flextural strength-have also increased as replacement ratio goes up. Therefore, it is considered that if the steel slag substitute concrete aggregate, it will give a boost up the improvement in fluidity and the quality of the aggregate.