jailcd2023033: Study on Flow Characteristics of Self-Compacting Concrete with Various Mixing Ratio of Molten Slag Fine Aggregate and Fly Ash

Abstract

Focusing on reducing environmental impact and solving labor shortages, this study evaluated the compressive strength and fresh properties of self-compacting concrete with varying replacement rates of molten slag fine aggregate and fly ash. In addition, for the practical application of self-compacting concrete, mixing was performed in an actual machine and prototypes of precast concrete products were made. The results showed that the slag replacement ratio increased from 0% to 50% in all formulations, and the slump flow and J-ring flow increased with the increase in the slag replacement ratio, and the flowability improved. The products showed high filling performance overall, but a few bubbles were observed on the outer and inner sides.