Q - What are different types of cement in use for variety of construction work.
Ans- Different types of cements -
( 1 ) 33 Grade Ordinary Portland Cement: IS 269-1989
This ordinary basic Portland cement is in maximum use in the country and is the most suitable cement for all masonry and general concrete works where the members are not to take very high stresses.
( 2 ) 43 Grade Ordinary Portland Cement: IS 8112-1989
( 3 ) 53 Grade Ordinary Portland Cement: IS: 12269-1987
Both above types of cements are used where high early strengths in 1 to 28 days range are required.
( 4 ) Portland Pozzolana Cement: IS: 1489-1991
The pozzolana used in the manufacture of Portland pozzolana cement is burnt clay, shale, or fly ash. The proportion of pozzolana used varies between 10 to 25 per cent by weight of cement as stipulated by Bureau of Indian Standards.
( 5 ) Portland (Blast Furnace) Slag Cement: IS: 455-1989
This type of cement is manufactured by intergrinding the portland cement clinker and blast furnace slag in the proportion of blast furnace slag not exceeding 65% as per Bureau of Indian Standards.
( 6 ) Rapid Hardening Portland cement: IS 8041-1990
This cement attains greater strengths at early ages and is hence sometimes called as high early strength cement.
( 7 ) Hydrophobic Portland Cement: IS 8043-1991
This is a cement, which repels water, and can be transported even during rains and stored in humid conditions.
( 8 ) Low Heat Portland Cement: IS: 12600-1989
In massive structures such as concrete bridge abutments, retaining walls, etc. when concrete is poured it generates considerable heat due to chemical reaction which takes place while cement is setting and hardening,
( 9 ) Sulphate resisting Portland Cement: IS: 12330-1988
In such areas of alkali conditions, for doing works like canal lining, pipe lines, culverts etc. a cement resistant to sulphate attack of very high degree is required.
( 10 ) High Alumina Cement: IS 6452-1989
The main characteristic features of high Alumina cements are they attain high early strength, high heat of hydration and have a good resistance to chemical attack. Initial setting time for high Alumina cement is just 3 minutes when compared to 30 to 45 minutes taken by ordinary portland cement.
( 11 ) White Portland Cement: IS:8042-1989
White colour it is mainly used in interior and exterior decorative works such as external renderings of buildings, facng slabs, terrazzo tiles and floorings, ornamental concrete products, swimming pools, etc.
No comments:
Post a Comment
Note: Only a member of this blog may post a comment.