一、前言 在建筑过程中,混凝土是一种使用非常普遍的建筑材料。根据人们预测:下一个世纪混凝土仍然是一种主要结构材料。然而,自从人们开始使用混凝土以后,混凝土本身固有的较低的抗拉强度和脆性断裂,已成为人们长期进行探索并力图得到解决的主要问题。近年来,国内不少人提出了混凝土改性的一些想法,实质上混凝土改性的关键就是提高它的韧性性 I. Preface In the construction process, concrete is a very common building material. According to people’s predictions: Concrete is still a major structural material in the next century. However, since people started to use concrete, the inherently low tensile strength and brittle fracture of the concrete itself has become a major problem that people have long explored and tried to solve. In recent years, many people in China have proposed some ideas for concrete modification. In fact, the key to concrete modification is to improve its toughness.