STUDY ON APPLICATION OF MORTAR AS SUBSTITUTE MATERIAL OF CONCRETE TO STRUCTURES

In this study, the mortar (structural mortar) of which aggregate volume is increased by optimizing the grading of fine aggregate in order to control drying shrinkage was developed. It is expected that sure cast without segregation is possible by applying this mortar to structures instead of concrete because the segregation resistance of mortar is higher than that of concrete. To develop structural mortar, first, the grading of fine aggregate for structural mortar was optimized by aggregate test, and its advantage was confirmed by mortar test. Next, it was confirmed that the drying shrinkage strain of structural mortar is nearly equal to that of concrete. Furthermore, the prototype of structural mortar was manufactured at a ready-mixed concrete plant and was cast into a wall-like form, and it was confirmed that the compactability and the segregation resistance of structural mortar is high.