NOTATION

	Shear stress
0	Yield shear stress as defined by Bingham equation
'0	Yield shear stress as defined by Herschel-Bulkley equation
µ	Plastic viscosity as defined by Bingham equation
µ'	Plastic viscosity as calculated from the Herschel-Bulkley parameters
	Shear strain rate
a, b	Parameters of the Herschel-Bulkley equation (theoretical)
	Torque measured in the rheometer
0	Torque corresponding to a zero-value of the angular velocity
N	Angular velocity
A, B	Parameters that depend on the rheometer geometry and the concrete (Herschel-Bulkley equation)
R2 , R1	Radii of the rheometer
, 1,  i	Solid volume fraction of a constituent
*,1 *,i*	Packing density of a dry mixture (maximum value of for close packing)
f, g	Undefined functions
γ	Virtual packing density
yi	Proportion by volume of size i, i.e., ratio of volume of size class i to the total solid volume
ni	number of size class i
aij , bij	Interaction functions describing binary relaxation and wall effect, respectively
i	Virtual packing density of size class i compacted alone
di , dj	Diameter of granular size classes i and j
K	Compaction index
Ki	Compaction index for each size class i
Ki	Compaction index for each size class i for de-aired concrete
Ks , Ka , Kc , Ksf	Compaction indices for sand, aggregates, cement and silica fume respectively
c	Maximum volume concentration of cement in a paste
SP%	Dosage of HRWRA (percent by mass of cement)
	Density
g	Acceleration of gravity
h	Height of slump cone
s	Slump measurement using the slump cone
T	Slump time