Dynamic mechanical properties of concrete containing cellulose fiber subject to coupling action of multiple impacts and high temperature erosion: Effects and mechanism

• Published in: Construction & building materials Vol. 471; p. 140714
• Main Authors: Wu, Hansong, Shen, Aiqin, Zhang, Jinxi
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 11.04.2025
• Subjects: Cellulose fiber; Coupling action; Dynamic mechanical properties; High temperature erosion; Multiple impacts; High temperature erosion; Dynamic mechanical properties; Multiple impacts; Coupling action; Cellulose fiber
• ISSN: 0950-0618
• DOI: 10.1016/j.conbuildmat.2025.140714

The pavement structure of airfields is frequently subjected to the coupling action of repeated aircraft loading and high-temperature tail jet flow. The objective of this study is to explore the dynamic mechanical properties of concrete incorporating cellulose fibers under the coupled influence of varying operational states of aircraft engines and multiple impact cycles. A simulation of the coupled effects was conducted under controlled laboratory conditions, followed by an investigation of the dynamic mechanical properties of cellulose fiber-reinforced concrete using the Split Hopkinson Pressure Bar (SHPB) device. Microstructural analysis was then performed through Scanning Electron Microscopy (SEM) and Mercury Intrusion Porosimetry (MIP). The findings indicate that the deterioration of dynamic mechanical properties is primarily attributed to the decomposition of hydration products, the pyrolysis of cellulose fibers, and the breakdown of aggregates under the coupled effects. Moreover, the strain rate sensitivity of the concrete becomes more pronounced due to the enhanced thermal activation and the concurrent development of multiple cracks. Finally, the paper outlines potential directions for future research in this domain. ▪Coupling action of repeated aircraft load and high-temperature tail jet flow was simulated.▪Dynamic mechanical properties, constitutive relationship and damage evolution of cellulose fiber reinforced concrete under coupling action.▪Micro-structure analysis was also be conducted by means of SEM and MIP tests.▪A viscoelastic damage constitutive model based on Weibull distribution was established.▪GM (1,1) model was employed to develop an evolution model of micro-structure under coupling action.