In 1756, a British engineer discovered that by heating a mixture of limestone and clay, you can achieve a "hydraulic cementing" effect (which is to say, hardening upon contact with water). This marked the invention of the concrete that we still use today.
到了一七五六年，英國一位工程師發現，石灰石加黏土混燒，具有「水硬性」（接觸水變硬）的功效，這就是今天人們所使用的水泥。