Is the fibre distribution in the concrete absolutely uniform?
If SFRC is mixed correctly the fibre distribution will be rather uniform. Fibre distribution can be considered as uniform, when each single measurement does not deviate more then 20% from the specified dosage rate value and when the mean value does not deviate more then 10% from that same value. Measurements should be done with minimum concrete volumes of ten (10) litres through a series of at least three (3) measurements. The SFRC samples should be taken after discharge has begun at the following intervals: about one-third of the mixer’s volume, during the middle and toward the end of the load. Samples should not be taken at the very end of the load.
