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UltraTech
is India's largest exporter of cement clinker.
The company's production facilities are spread
across eleven integrated plants, one white cement
plant, one clinkerisation plant in UAE, fifteen
grinding units, and five terminals — four
in India and one in Sri Lanka. Most of the plants
have ISO 9001, ISO 14001 and OHSAS 18001 certification.
In addition, two plants have received ISO 27001
certification and four have received SA 8000 certification.
The process is currently underway for the remaining
plants. The company exports over 2.5 million tonnes
per annum, which is about 30 per cent of the country's
total exports. The export market comprises of
countries around the Indian Ocean, Africa, Europe
and the Middle East. Export is a thrust area in
the company's strategy for growth.
UltraTech's
products include Ordinary Portland cement, Portland
Pozzolana cement and Portland blast furnace slag
cement.
Ordinary Portland cement
Ordinary portland cement is the most commonly used
cement for a wide range of applications. These applications
cover dry-lean mixes, general-purpose ready-mixes,
and even high strength pre-cast and pre-stressed
concrete.
Portland
blast furnace slag cement
Portland blast-furnace slag cement contains up to
70 per cent of finely ground, granulated blast-furnace
slag, a nonmetallic product consisting essentially
of silicates and alumino-silicates of calcium. Slag
brings with it the advantage of the energy invested
in the slag making. Grinding slag for cement replacement
takes only 25 per cent of the energy needed to manufacture
portland cement. Using slag cement to replace a
portion of portland cement in a concrete mixture
is a useful method to make concrete better and more
consistent. Portland blast-furnace slag cement has
a lighter colour, better concrete workability, easier
finishability, higher compressive and flexural strength,
lower permeability, improved resistance to aggressive
chemicals and more consistent plastic and hardened
consistency.
Portland
Pozzolana cement
Portland pozzolana cement is ordinary portland cement
blended with pozzolanic materials (power-station
fly ash, burnt clays, ash from burnt plant material
or silicious earths), either together or separately.
Portland clinker is ground with gypsum and pozzolanic
materials which, though they do not have cementing
properties in themselves, combine chemically with
portland cement in the presence of water to form
extra strong cementing material which resists wet
cracking, thermal cracking and has a high degree
of cohesion and workability in concrete and mortar.
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