Early-age cracking of tunnel lining concrete under adverse curing threatens long-term durability. This study integrates material-scale testing, structural-scale testing, and multiscale simulation to investigate cracking behavior and prevention strategies. Material-scale experiments on self-compacting concrete (SCC) under three curing regimes and four demolding times (1–7 d) revealed that extending demolding time mitigated strength loss, with 28 d strength increasing by up to 22.3% under low-temperature curing. The DuCOM model predicted strength evolution with an average 28 d error of 2.5%. Structural-scale tests under laboratory ambient exposure (S1) and moisture-retaining curing (S2) showed that S1 specimens cracked at ~8 d when the stress-to-strength ratio exceeded 1.0, whereas S2 specimens remained crack-free. The coupled DuCOM–COM3D framework captured internal stress evolution with peak stress errors within 1.77% (S1) and 8.74% (S2). Based on the stress-to-strength ratio criterion as a preliminary indicator, three prevention measures are proposed: extending demolding time, immediate moisture-retaining curing, and real-time early warning. This quantitative framework provides a preliminary basis for early-age cracking risk assessment in the present experimental configuration.
To address the low demolition efficiency of static-cracking technology in reinforced concrete structures under sensitive environments, which is primarily caused by the reinforcement restraint effect, this paper presents a narrative review based on a systematic literature-search procedure and case-study compilation. Sta...
Hui Li, Ying Peng, Jun-Jie An et al.· Applied Sciences· 0 citations
The wet joint, a critical component in prefabricated steel-concrete composite beams (SCCBs), is typically subjected to tensile stresses during service. Consequently, its crack resistance directly governs the serviceability and durability of the SCCB. This study investigates the use of an early-strength, low-shrinkage b...
Jun-Hu Shao, Jun Xu, Cheng Zhang et al.· Transportation Research Reco...· 0 citations
Fatigue cracking is a load-related distress limiting flexible pavement service life. This review evaluates 121 studies on the fatigue resistance of crumb rubber-modified asphalt (CRMA) across binder, mixture, modeling, and field scales. CRMA improves fatigue resistance through rubber–asphalt interaction and the elastic...
Anil Rai, Sushmit Sharma Bhattarai, Hyunhwan Kim et al.· Polymers· 0 citations
Highlights What are the main findings? • MP40 polymer fibers increased the mean ultimate crushing load by 33.6%.• Fibers promoted distributed cracking and delayed brittle failure.• Initial stiffness and service-load response remained essentially unchanged. What are the implications of the main findings? • The tested fi...
The use of recycled aggregates in concrete can lead to structural differences, which in turn affect its fracture behavior. These differences are expected to influence crack propagation and fracture parameters. Therefore, investigating the crack behavior of recycled aggregate concrete (RAC) and applying fracture mec...
S. Nabavian, H. Fallahnejad, A. Gholampour· Structural Concrete· 0 citations
The longitudinal joint zone in highway widening projects constitutes a persistent structural vulnerability where subsurface damage preferentially accumulates beneath an apparently intact surface. Conventional Pavement Condition Index (PCI)-based assessment captures functional degradation but fails to resolve internal c...
Zhang-Yin Gu, Jin-Chao Guan, Sheng-Yuan Wang et al.· Frontiers in Built Environme...· 0 citations
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