Short Essay On Concrete

Image Concrete is a material or a mixture of materials composed of aggregates or rocks mixed with a paste of cement and water,coats the surface of small and large rocks.. When the aggregates or rocks are mixed with dry cement and water,a fluid mass is formed which can be molded into any shape or size.A chemical reaction takes place when cement is added with water and other ingredients and form a hard and strong matrix which binds all the materials together into a stone-shape like material which has many uses. Concrete is widely used in construction of building or structures,pillars,roads,foundations,bricks/blocks walls,pavements,bridges/overpass,parking structures,dams,pools and polls etc.Concrete is used in different quantities

Perhaps the earliest known occurrence of cement was twelve million years ago. A deposit of cement was formed after an occurrence of oil shale located adjacent to a bed of limestone burned due to natural causes. These ancient deposits were investigated in the 1960s and 1970s.[5]

On a human time-scale, small usages of concrete go back for thousands of years. The ancient Nabatea culture was using materials roughly analogous to concrete at least eight thousand years ago, some structures of which survive to this day The time period during which concrete was first invented depends on how one interprets the term “concrete.” Ancient materials were crude cements made by crushing and burning gypsum or limestone. Lime also refers to crushed, burned limestone. When sand and water were added to these cements, they became mortar, which was a plaster-like material used to adhere stones to each other. Over thousands of years, these materials were improved upon, combined with other materials and, ultimately, morphed into modern