Portland cement is the most common type of cement in general use around the world as a basic ingredient of concrete, mortar, stucco, and non-specialty grout. It was developed from other types of hydraulic lime in England in the early 19th century by Joseph Aspdin, and is usually made from limestone. It is a fine powder, produced by heating limestone and clay minerals in a kiln to form clinker, grinding the clinker, and adding 2 to 3 percent of gypsum.
invented by Samuel Morse
Morse code is a method used in telecommunication to encode text characters as…
invented by Louis Pasteur
Pasteurization or pasteurisation is a process in which packaged and…
invented by Hiram Maxim
The Maxim gun is a recoil-operated machine gun invented in 1884 by Hiram…
invented by Nicéphore Niépce
Nicéphore Niépce invents Heliography, the first photographic process.
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