In 1824 an English inventor, Joseph Aspdin, burned and ground collectively a mixture of limestone and clay. This combination, known as portland cement, has remained the dominant cementing agent used in concrete generation. Concrete has relatively substantial compressive toughness, but Significantly lessen tensile strength.[106] For that reason, it will likely https://networkbookmarks.com/story19774047/the-best-side-of-concrete-reinforced-stone