It can be concluded that there is a relationship between the viscosity of cellulose admixtures and the
WRV water retention by the mortar, figure 4a. This effect is uneven, with the greatest intensity observed
when the viscosity of cellulose admixtures changed from 6,000 mPa·s to 20,000 mPa·s in the case of
HPMC, from 6,500 to 14,000 mPa·s for MEHEMC, and from 6,000 to 31,000 mPa·s. A further increase
in the viscosity of cellulose admixtures had an increasingly lower effect on the change in WRV.