The Double-K Fracture Toughness of Concrete with Different Coarse Aggregate Volume Fractions
Xiao Li, Ying Zhang, Yanwei Chen, Ying Yuan, Jili Feng, Zhiguang Li · 2025
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Description
How much coarse gravel goes into concrete changes how the hardened material cracks. Xiao Li and co-authors test concrete mixes with six gravel shares, from 19 to 50 percent, using wedge-splitting tests that pry specimens apart. They measure strength, stiffness, and a two-part measure of fracture toughness.
Stiffness and compressive strength rose steadily with more gravel. Tensile strength, toughness, and fracture energy rose then fell, peaking at a 37 percent gravel share. Crack paths also wound most at that share. The team fitted simple formulas linking tensile strength to toughness and proposed a warning index for brittleness before peak load. The results give mix designers a concrete target for balancing strength and crack resistance.
Catalog record
| CREATOR | Xiao Li, Ying Zhang, Yanwei Chen, Ying Yuan, Jili Feng, Zhiguang Li |
|---|---|
| YEAR | 2025 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 35 KB |
| VERSION | 1.0 |
| LICENSE | CC BY 4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |