In 1824 an English inventor, Joseph Aspdin, burned and ground alongside one another a mix of limestone and clay. This mixture, named portland cement, has remained the dominant cementing agent used in concrete generation. Concrete has relatively substantial compressive energy, but Substantially decreased tensile energy.[106] Thus, it is often reinforced https://website-wordpress25791.activoblog.com/40325063/the-best-side-of-reinforced-concrete