ABSTRACT
Concrete is widely used in various fields of civil engineering, but the material has defects such as low tensile strength, poor toughness, and difficult to control crack width after cracking, which not only affect the service performance of the structure but also reduce the life of the project under environmental conditions, such as corrosion, and even cause safety accidents. The fiber-reinforced cementitious composite material (hereinafter referred to as X material) proposed in this paper is a new disordered short fiber-reinforced cementitious material with stress-strain hardening characteristics, high tensile strength, and excellent crack control ability. X material as a repair material to replace the damaged area of the structure has broad application prospects in increasing the structural load-bearing capacity and improving structural durability. Based on the study of the development background and research progress of X material, this paper further summarizes the advantageous characteristics of its mechanical properties, and conducts a study on the design of matching ratio and the prospect of practical engineering application of domestic X material. It aims to promote the development of research in this field to enhance the durability of concrete materials, improve the brittleness of concrete materials, and reduce the risk of cracking of concrete structures.
