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在地震中,用这种混凝土建造的建筑物只会发生挠曲而不会倒塌。数千年来,混凝土一直是一种简易可靠的建筑材料·埃及人用它建造金字塔,罗马人用它筑早构坝·就是在今夭,它仍然是建筑业的主要材料。近些年来,混凝土里由于放进了人造纤维和化学制品通过旋转,搅拌、挤压等过程,它的性能和耐久性有了一些改进.现在,伊利诺斯州埃文斯顿西北大学的研究人员
In an earthquake, a building built with this type of concrete will only flex and not collapse. For thousands of years, concrete has always been a simple and reliable building material. The Egyptians used it to build pyramids. The Romans used it to build early dams. This is the present day and it is still the main material of the construction industry. In recent years, there have been improvements in the performance and durability of concrete due to the incorporation of man-made fibers and chemicals through rotation, stirring, and extrusion. Nowadays, Northwestern University in Evanston, Illinois personnel