Exhibits very high fluidity and filling ability,leveling like a liquid to occupy every corner of the formwork.Excellent segregation resistance ensures homogeneity during flow,preventing separation of aggregates and paste.Eliminates vibration noise and labor,enhancing construction efficiency and quality consistency.Provides superior surface finish,free of honeycombs or surface blemishes.

Workability is comprehensively assessed by Slump Flow,T500 time(time to reach 500mm diameter),and U-Box or L-Box tests.Classified into different performance levels(e.g.,SF1,SF2,SF3)based on filling ability,passing ability,and segregation resistance.Highly sensitive to material quality,requiring high-grade admixtures and well-graded aggregates.

Used in densely reinforced structures:diaphragm walls,concrete-filled steel tubes,complex beam-column junctions.Ideal for thin-walled,complex-shaped elements where vibration is impossible or impractical.Widely used in precast element production for rapid casting.Employed for grouting in narrow spaces during strengthening/repair and for infill in existing structure rehabilitation.