混凝土是我们日常生活中最常见、最常用的建筑材料之一。水泥一般是用石灰石、粘土和微量元素混合而成的粉状材料,它同水、沙子和砾石搅拌后便成为混凝土。现代水泥技术可追溯到1824年,当时英国人约瑟夫·阿斯普丁在一座炉子上制造出他称之为波特兰水泥的材料。阿斯普丁以英格兰南部波特兰岛命名他的水泥,因为他认为用水泥制成的混凝土类 Concrete is one of the most common and commonly used building materials in our daily life. Cement is generally a powdered material made of a mixture of limestone, clay and trace elements. It is mixed with water, sand and gravel and becomes concrete. Modern cement technology can be traced back to 1824, when the British Joseph Aspudin made a material he called Portland cement on a stove. Aspdin named his cement in Portland, South of England, because he thought concrete made of cement