Page 12 - CONCRETE MATERIALS AND MIXTURE
P. 12
Types of Composition Purpose
Cement
sewage works, sewage works and
Pozzolanic It is prepared by grinding It is used in marine structures,
pozzolanic clinker with
Cement Portland cement for laying concrete under water
such as bridges, piers, dams etc.,
It is produced by adding This type of cement is specially
indigenous air entraining suited to improve the workability
Air Entraining agents such as resins, with smaller water cement ratio
Cement glues, sodium salts of and to improve frost resistance of
Sulphates etc during the concrete.
grinding of clinker.
It is obtained by melting
mixture of bauxite and lime
and grinding with the It is used in works where
High Alumina clinker it is rapid concrete is subjected to high
Cement hardening cement with temperatures, frost, and acidic
initial and final setting time action.
of about 3.5 and 5 hours
respectively
