Review of Mechanical Properties and Damage Theory of Fiber-Reinforced Low-Heat Cement Concrete

Low-heat Portland cement has been extensively used in mass concrete because of its low hydration heat and high later strength. However, low-heat cement has characteristics of slow activity and low early strength, which affects its propagation and applications in mass concrete to a certain degree. Moreover, comprehensive theoretical research on the mechanical properties and constitutive relations of pure and modified low-heat cement concretes is lacking. In view of this, this study reviews the research progress of the mechanical properties and the damage theory of fiber-reinforced low-heat cement concrete based on analysis of the existing literature. First, the mineral composition, hydration mechanism, and performance characteristics of low-heat cement concrete are analyzed. Second, the performance traits of low-heat cement fiber concrete are examined, and the influence laws of basalt and brucite fibers on the mechanical properties of concrete are determined. Finally, the application of damage mechanics theory to fiber-reinforced concrete is summarized. This study shows that although fibers can effectively enhance the mechanical properties of low-heat cement concrete, there are limitations in the selection of fiber type. In addition, basalt and brucite fibers play significant roles in enhancing the mechanical properties of concrete; therefore, the objectives of this paper are to present the application prospects of fibers in low-heat cement concrete and propose a new concept of mixing fibers to boost the early mechanical properties of low-heat cement concrete. Combining theoretical research and analysis, it provides directions and concepts for applying the damage theory to low-heat fiber cement concrete in the future.

Automated summary

This study reviews the research progress of the mechanical properties and the damage theory of fiber-reinforced low-heat cement concrete. It analyzes the characteristics of low-heat cement concrete and the influence of basalt and brucite fibers on its mechanical properties. The study proposes the concept of mixing fibers to boost the early mechanical properties of low-heat cement concrete, providing directions and concepts for future application of the damage theory.