FLATNESS FF & LEVELNESS FL of CONCRETE
ADDITIVES RECOVER (Hydration Stabilizer ASTM C 494, TYPE D)/GRACE DARACEM 55 (Mid range Water-Reducing Admixture) ASTM C-494 TYPE A/ GRACE DARA FILL (Controlled Low Strength Material Performance Additive)/GRACE ADVA (Superplasticizer ) ASTM 494 TYPE F/GRACE ECLIPSE (Shrinkage Reducing Admixture)/GRACE FLATNESS (FF) & LEVELNESS (FL) WHAT ARE "F" NUMBERS? THE "F" NUMBER IS A NEW AMERICAN CONCETE INSTITUTE (#117) AND CANADIAN STANDARDS ASSOCIATION (#A23.1) STANDARD SPECIFICATIONS AND MEASUREMENT OF CONCRETE FLOOR FLATNESS AND LEVELNESS. F-NUMBERS REPLACE THE FAMILIAR "1/8TH INCH IN TEN FEET" TYPE SPECS THAT HAD PROVEN UNRELIABLE, UNMEASUREABLE AND UNREALISTIC. THE NEW STANDARDS INCLUDE TWO "F"-NUMBERS: FF = FOR FLATNESS (BUMPINESS OF THE FLOOR) FF25/FL20 EXAMPLE FL= FOR LEVELNESS (TILT OR PITCH O...
