混凝土材料是当今世界上使用最为广泛、用量最大的土木工程材料,具有易成型、价格低廉、废弃物可处置利用等优点,在今后相当长的时间内仍将是主要的土木工程材料之一。随着科学技术的发展,传统的混凝土技术已经不能满足工程界对其性能日益增长的要求,因此,混凝土外加剂在20世纪30年代应运而生,被认为是混凝土工艺和应用技术上继19世纪中叶和20世纪初的钢筋混凝土、预应力混凝土和之后的第三次突破。其品种不断增多,性能也不断改善。理所 Concrete materials are the most widely used and most used civil engineering materials in the world today. They have the advantages of easy molding, low cost, and waste disposal and utilization. They will remain one of the major civil engineering materials for a long time to come. With the development of science and technology, traditional concrete technology has been unable to meet the increasing requirements of the engineering community for its performance. Therefore, concrete admixtures came into being in the 1930s and is considered to be the concrete process and applied technology in the 19th century. The middle and early 20th century reinforced concrete, prestressed concrete and after the third breakthrough. Its variety continues to increase and its performance continues to improve. Institute