In this study, the conventional model for the yield stress with the volume fraction of aggregate, where the volume fraction of aggregate was considered separately into the volume fraction of fine and coarse aggregate. The modified model equation can be applied to relate the yield stress of the wet sieved mortar and that of the concrete. Based on the model equation and the mix proportion of concrete, the yield stress of concrete is well predicted, which contributes the simplification of the performance evaluation process of concrete.

• 이진현(한국과학기술원 건설및환경공학과) | Lee Jin-Hyun
• 김재홍(한국과학기술원 건설및환경공학과) | Kim Jae-Hong