· TEN PERCENT FINES VALUE (TFV) A 258 AGGREGATE IMPACT VALUE (AIV) APPARATUS BS AGGREGATE CRUSHING VALUE (ACV) TEN PERCENT FINES VALUE (TFV) BS 812 Standard test A 257/01 STEEL CYLINDER INTERNAL DIA. 150 mm supplied with plunger and base plate A 257/02 METAL MEASURE DIA. 115 x 180 mm AT 211/P STEEL TAMPING ROD x 600 mm Tests for aggregates .