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一、水泥混凝土及其演变水泥自上世纪初诞生以来,以其技术和经济上的优越性,获得极大发展。以水泥为胶结材的混凝土(确切讲是钢筋混凝土)早已成为用量最大、使用领域最广的建筑材料,并被誊为第一结构材料。预期21世纪,混凝土在建材中的地位仍难以被其它材料所取代。但是,水泥混凝土本质造成的“脆性”和难以完全避免的“不密实性”,使它不能满足更多方面的使用要求,尤其不能满
First, cement concrete and its evolution Since its inception at the beginning of the last century, cement has gained great development with its technical and economic superiority. Cement concrete cement (specifically reinforced concrete) has long been the largest and most widely used building material, and it has been reduced to the first structural material. It is expected that in the 21st century, the status of concrete in building materials is still difficult to be replaced by other materials. However, the “brittleness” caused by the nature of cement concrete and the “denseness” that are difficult to completely avoid make it unable to meet the requirements for more applications, especially the