•The workability of concrete can be increased by using fine pozzolonic materials.
•They react with calcium hydroxide and form compounds which have cementitious properties and are highly stable.
•Ex:siliceous and aluminous materials like silica fume,fly ash,blast furnace slag,clay,shales.
•Workability can also be increased by following
~Proper water-cement ratio.
~Using round and smooth aggregates.
~Maintaining moderate temperature.