Fiber-Reinforced Concrete: Pore Structure, Impact-Resistance and Durability
A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Civil Engineering".
Deadline for manuscript submissions: closed (25 March 2022) | Viewed by 309
Special Issue Editors
Interests: concrete; fiber; pore structure; impact-resistance; strain rate; durability; constitutive relationship; transport model
Special Issue Information
Dear Colleagues,
It is well known that concrete is a typical quasi-brittle material with low toughness and strain capacity. As a result, cracks form easily under the action of external force, which accelerates the performance degradation of concrete structures during their service life. The addition of fibers, especially hybrid fibers, can significantly reduce the brittleness and increase the toughness of concrete, which is not only conducive to the improvement of the impact resistance of concrete, but also has a positive effect on the concrete durability. Therefore, a systematic investigation on the impact resistance and durability of fiber-reinforced concrete, and the underlying mechanisms, would be beneficial to the engineering applications of fiber-reinforced concrete.
There are few research works concerning the effect of fibers on the pore structure of cementitious materials. The addition of fibers can alter the hydration properties of cement and thus the microstructure evolution of concrete. This is critical because the microstructure, especially the pore structure, determines the macroscopic performance of concrete. Therefore, to effectively clarify the influence of fibers on the pore structure would be helpful to reveal the mechanism regarding the modification of mechanical properties and the durability of concrete with the presence of fibers.
Fiber-reinforced concrete is highly desired in engineering structures with anti-blast requirements, which can be attributed to the fact that the addition of fibers can effectively improve the impact resistance of concrete. The crack-bridging effect of fibers and the hybrid effect of multi-scale fibers can effectively inhibit the propagation of cracks. In addition, either the fracture of fibers or the friction between fibers and matrix during the pulling-out process can also effectively increase the dynamic energy consumption of concrete, thereby improving the impact resistance.
Lastly, the addition of fibers also alters the intrusion process of external corrosive media, which influences the durability of concrete, especially under external load.
Therefore, aim of this Special Issue is to provide findings on i) the influence of fibers on the pore structure of concrete; ii) the impact resistance of fiber-reinforced concrete; and iii) the durability of fiber-reinforced concrete, especially the ion transmission performance.
Dr. Qiang Fu
Dr. Daming Luo
Guest Editors
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Keywords
- fiber-reinforced concrete
- pore structure
- impact-resistance
- durability
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