The use of cementing materials goes back to the antiquated Egyptians and Romans, however the invention of modern portland cement is usually attri anded to Joseph Aspdin, a builder in Leeds, England, who obtained a patent for it in 1824. Currently, the one-year world production of portland cement is around 700 million measured tons (Danbury). Many people use the words cover and cement interchangeably, but theyre not. Concrete is to cement as a cake is to flour. Concrete is a mixture of ingredients that includes cement but ...If you want to get a full essay, order it on our website: BestEssayCheap.com
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