Advances in Highly Ductile Concrete Research.

Area of Science:

• Materials Science
• Civil Engineering
• Structural Engineering

Background:

• Traditional concrete has poor tensile properties, necessitating costly steel reinforcement.
• High-ductility concrete (HDC) is emerging as a superior alternative due to enhanced ductility and crack resistance.
• Existing research on HDC is fragmented, requiring comprehensive analysis.

Purpose of the Study:

• To analyze the fundamental mechanical properties of HDC.
• To evaluate the durability of HDC under environmental stressors like wet/dry cycles, freeze-thaw cycles, and salt erosion.
• To consolidate scattered research and propose future development directions for HDC.

Main Methods:

• Comprehensive analysis of existing literature on HDC.
• Evaluation of mechanical properties, including splitting tensile strength with varying steel fiber content.
• Assessment of durability through simulated environmental degradation tests.

Main Results:

• Incorporating appropriate fibers significantly enhances HDC's tensile properties.
• A 2.0% volume fraction of steel fiber increased concrete's splitting tensile strength by 98.3%.
• HDC effectively controls crack width within the 55-80 μm threshold, mitigating chloride ion ingress and improving durability.

Conclusions:

• HDC demonstrates significant improvements in tensile strength and crack control.
• Steel fiber reinforcement is crucial for enhancing HDC's mechanical performance and durability.
• HDC offers a promising solution for more resilient and cost-effective construction.