###### Abstract
Under the condition of a fixed water-binder ratio of 0.5, different amounts of PE (sand volume ratio of 0%, 1%, 2%, 3%, and 4%) and GGBFS (0%, 10%, and 20% substituted cement) were used to prepare specimens. The results showed that when the amount of waste PE was within 2% and the replacement of cement by GGBFS was 10%, the goal of waste recycling was most effectively achieved while maintaining the mechanical properties of the mortar. [PERSON] et al. [5] explored the effects of different fibers on the spalling resistance and mechanical properties of self-compacting concrete (SCC) after high temperatures. Experimental variables included fiber type (steel fibers (SF) and polypropylene fibers (PF)), content (two PF contents, three SF contents, and one hybrid fiber), and target temperature (200 \({}^{\circ}\)C to 1000 \({}^{\circ}\)C). The obtained results indicated that PF can effectively prevent explosive spalling in SCC. Furthermore, a sharp decrease in compressive strength was observed when the target temperature exceeded 400 \({}^{\circ}\)C. This result confirmed that incorporating fibers is an effective method to improve the resistance to explosion spalling and residual mechanical properties during a fire. [PERSON] et al. [6] analyzed the impact of using basalt and bamboo fibers as modifiers on the properties of asphalt mastic. The effects of these two fibers on putting resistance, fatigue resistance, elastic recovery, and low-temperature cracking performance were tested using frequency scanning, linear amplitude scanning, multiple stress creep and recovery, elastic recovery, and bending beam rheometer experiments. Their results showed that adding fibers to asphalt mastics can effectively increase their stiffness. In addition, the incorporation of fibers significantly enhanced the high-temperature rutting resistance of asphalt mastics. However, adding fiber did not show any significant benefit in terms of fatigue resistance. It is worth noting that adding basalt fiber to asphalt mastics did not improve its resistance to low-temperature cracking. Overall, bamboo fiber performed better than basalt fiber in improving the properties of modified asphalt mastics. [PERSON] et al. [7] proposed the axial stress-strain behavior of steel fiber-reinforced steel slag micro-powder ultra-high-performance concrete (UHPC). Nine groups of specimens with coarse aggregate and steel fiber content were prepared and subjected to axial compression and elastic modulus tests. Their test results showed that, compared to non-steel fiber specimens, the peak strains of the experimental groups incorporating 1%, 1.5%, and 2% steel fibers increased by approximately 20.3%, 25.3%, and 26.2%, respectively. In addition, based on the stress-strain curve obtained from the experiment and through curve fitting, the constitutive equation suitable for steel fiber-reinforced steel slag powder UHPC was further derived. Although submissions for this Special Issue have closed, a Second Edition of this Special Issue is open. More in-depth research in the field of HPFRC continues to address the challenges we face today, such as reducing the negative impact of fiber on certain concrete properties, the impact of fiber mixing on HPFRC performance, theoretical research on the mechanism of fiber mixing, and the development direction of fiber concrete technology. Thanks to all the authors and peer reviewers for their valuable contributions to this Special Issue 'Advances in High-Performance Fiber-Reinforced Concrete'. I would also like to express my gratitude to all the staff and people involved in this Special Issue. The author declares no conflict of interest.