ABSTRACT
Mixture proportions may also affect both the value of workability determined by any of these test methods and its variability. Since the fibres are accommodated solely within the cement paste, the consistency of that phase coupled with its relative volume fraction and the volume fractions of fine and coarse aggregate in the mixture may be expected to influence the value of workability obtained by any test method. Unsatisfactory mixture proportioning for the fibre type, amount and mixing process selected may fail to produce a reasonably uniform fibre distribution throughout the mixture causing the variability of workability measurements to be abnormally high. Therefore, properly selected fibre-mixture combinations and an effective mixing process are essential for meaningful assessment of any workability-measuring technique.
