What are all the types of cement?
o Ordinary Portland cement
o OPC33,OPC43 and OPC53
o Rapid hardening cement
o Extra rapid hardening
o Sulphate resisting cement
o Portland slag cement
o Quick setting cement
o Low heat cement
o Portland pazzolona cement
o Air entraining cement
Differentiate dry process and wet process of
manufacturing cement? Process
Lime stone and clay are ground to fine powder separately
and are mixed together
Water is added to make a thick paste which
contains 14% of moisture
The paste format are dried and off charged into a
The product obtained often calcinations in rotary
crushed raw materials are fed in to a ball mill and a little water is added
The steel balls in the ball mill pulverized the
raw material which form a slurry with water
The slurry is passed through storage tanks where
the proportioning of compound is adjusted to ensure desired chemical
3) Define batching, what are all the methods of
The measurement of materials for
making concrete is known as batching. Methods of batching Volume batching Weigh
4) What are all the raw materials of the cement?
o Calcium sulphate
o Iron oxide
o Magnesium oxide
o Sulphar ti oxide
Write notes on steam curing.
This approach is widely used in
precast concrete units.here the precast units are kept under warm and damp
atmosphere of a steam chamber.
6) Define non destructive testing.
Non destructive testing is done
on haredend concrete in non destructive testing methods soe properties of
concrete are used to estimate strength durability ,elastic parameters,crack
depth micro cracks and progressive deteriotion of concrete.
7) What are all the types of concrete test?
Slump test compressive test split