The author's study of continuous compact deposit grading of aggregate through(systematic) experimental research lead to extend the two conventional formulae of continuous grading to five formulae depending on five rheological types of concrete mixtures.

Aqueous slurries of 8%(mol fraction) yttriastablized zirconia were firstly prepared Measurements and analytical methods to zeta potential, rheological properties, sediment experiment, SEM photographs of sediment particles were used for optimizing parameters High dispersible and stable zirconia aqueous slurries are gained through adjusting pH value and dispersant content