In 1824, Joseph Aspdin, a bricklayer and mason in Leeds, England took out a patent on hydraulic cement, and he called it Portland cement. And he called it that because the color resembled the stone that they quarried on the Isle of Portland off the British coast. Now, his method involved the careful proportioning of limestone and clay.
He pulverized them, and then burned the mixture into what he called “clinker.” That was then ground into the finished cement product. Now, this process that dates back to the 1800s really most resembles the method that we use to make cement today, and today we use these terms, Portland cement and cement, interchangeably.
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