Mechanical Performance and Microstructure Evolution of High-Ferrite Portland Cement Concrete Under the Coupled Abrasion and Freeze–Thaw Cycling Conditions
Xingdong Lv, Yun Dong, Zeyu Fan
TL;DR
This study examines how high-ferrite cement concrete degrades under combined abrasion and freeze-thaw conditions, revealing significant mechanical and structural changes.
Contribution
The paper introduces a novel analysis of microstructure evolution and mechanical performance under coupled abrasion and freeze-thaw cycling in high-ferrite cement concrete.
Findings
Concrete deterioration is significantly worse under combined abrasion and freeze-thaw conditions compared to single-factor abrasion.
HFC1 concrete shows 8.2–26.4% higher abrasion resistance and 6.5–12.0% greater nanoindentation elastic modulus in the ITZ compared to HFC2.
Abrasion time has a 4.8 to 10.0 times greater deterioration weight than freeze-thaw cycling, making it the dominant factor.
Abstract
This study investigates the performance and microstructure evolution of high-ferrite Portland cement (HFC) concrete under the coupled action of abrasion and freeze–thaw cycles (CAA-FTC). The 3D surface morphology of deteriorated concrete was studied; abrasion depth and volume loss evolution data were collected, while analyzing the abrasion depth fractal dimension. The characteristics of hydration products were determined using mercury intrusion porosimetry and 29Si nuclear magnetic resonance method. The ITZ’s micromechanical properties and thickness were investigated via nanoindentation and SEM-EDS. The results show that under the CAA-FTC conditions, concrete deterioration is significantly exacerbated, leading to increased abrasion depth and volume loss compared to single-factor abrasion. A significant inverse relationship between the abrasion depth fractal dimension and abrasion…
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Taxonomy
TopicsConcrete and Cement Materials Research · Tailings Management and Properties · Concrete Properties and Behavior