Development of Ultra-High-Performance Hybrid Fiber-Reinforced Cement-Based Composites

作者：Kwon Sukmin^*; Nishiwaki Tomoya; Kikuta Takatsune; Mihashi Hirozo

来源：ACI Materials Journal, 2014, 111(3): 309-318.

DOI：10.14359/51686890

• energy-absorption capacity
• hybrid
• hybrid fiber-reinforced cement-based composite
• macrofiber
• microfiber
• tensile-strain capacity
• tensile strength

A new ultra-high-performance hybrid fiber-reinforced cement-based composite (UHP-HFRCC) was developed in this study. The UHP-HFRCC exhibited a tensile strength of 20.1 MPa (2.9 ksi), a strain capacitj) of 1.06%, and energy-absorption capacity of 153 kJ/m(3) (1356 lb-ft/ft(3)). The multi-scale fiber-reinforcement system employed herein effectively improves the mechanical properties of the UHP-HFRCCs under tension. Determining the appropriate volume fraction of the longer fibers is crucial for enhancing a variety of mechanical properties, including the tensile strength, strain capacity, and energy-absorption capacity. Besides the significant improvement in the mechanical properties of UHP-HFRCC, the cost was reduced, and the workability of the material was improved by using relatively low-volume fractions of fibers (total volume fraction = 2.5 to 3%).

• 出版日期2014-6