In 1824 an English inventor, Joseph Aspdin, burned and ground alongside one another a mix of limestone and clay. This mixture, termed portland cement, has remained the dominant cementing agent Utilized in concrete production. Concrete has somewhat significant compressive energy, but Considerably lessen tensile strength.[106] Hence, it is normally reinforced https://baidubookmark.com/story19623291/5-simple-techniques-for-concrete-reinforced-with-rebar