| 2. | At the same time , the ever - growing population , the resources shortage , and the daunting environmental pollution have made high rises , skyscrapers a trend . more over , concrete structures have become widely demanded in severe environments such as off - - shore petrol platform , cross strait bridge , under sea tunnels , drainage pipes , nuclear waste containers , nuclear reaction shells , poisonous chemical containers etc . . all of the above mentioned buildings and structures require the use of cement based materials
与此同时,在人口增长和资源短缺、环境污染的威胁下,建筑物越来越向着超高层化、超大跨化方向发展,各种严酷环境下使用混凝土结构也越来越多,如:海上石油平台、跨海大桥、海底隧道、污水管道、核废料容器、核反应堆外壳、盛装有害化学物的容器等,如此众多的建筑物和结构都主要采用了水泥混凝土材料。 |
