quot;What date was cement made?
1.Cement is made by heating powdered limestone and clay. 2.It is used in mortar and concrete - mortar is used to join bricks together and is made by mixing cement with sand and water - concrete is made by mixing cement with sand, water and aggregate (crushed rock) 3.it sets and hardens quickly so building is faster. 4. Portland cement mortar was invented in 1794 and patented in 1824. It gained in popularity over lime mortar by the latter part of the 19th century and by 1930 has all but replaced lime mortar for new construction. Lime mortar was first used in Mesopotamia and was made by heating up limestone to drive out the water, then grinding it to a powder, which had sand added to it for greater strength. To use it, water was mixed to it to form a paste which slowly hardens. It was used in the Pyramids.
The ancient Greeks and Romans used it to build the aqueducts, baths, and temples, but the modern version of hydraulic cement was developed by James Parker in the 1780s and patented in 1796.
