The story of the invention of Portland cement is, however,
attributed to Joseph Aspdin, a Leeds builder and bricklayer, even
though similar procedures had been adopted by other inventors.
Joseph Aspdin took the patent of portland cement on 21st
October 1824. Concrete is made by portland cement, water and
aggregates. Portland cement is a hydraulic cement that hardens in
water to form a water-resistant compound. The hydration
products act as binder to hold the aggregates together to form
concrete. The name portland cement comes from the fact that
the colour and quality of the resulting concrete are similar to
Portland stone, a kind of limestone found in England.
Manufacture of Portland Cement:
The raw materials required for manufacture of Portland
cement are calcareous materials, such as limestone or chalk, and
argillaceous material such as shale or clay. Cement factories
are established where these raw materials are available in plenty.
Cement factories have come up in many regions in India,
eliminating the inconvenience of long distance transportation of