Xuzhou University of Technology

This study investigates the influence of curing temperature on the creep properties of alkali-activated slag-loess-based cemented backfill (SLCB) and establishes a constitutive model to accurately describe its full-stage creep behavior, thereby providing a theoretical basis for evaluating the long-term stability of mine backfill structures. Through an integrated approach of laboratory experimentation and theoretical modeling, triaxial step-loading creep tests were performed on SLCB specimens subjected to curing temperatures of 5, 20, 35, and 50 °C. The characteristics of creep deformation, deformation rate, long-term strength, and failure stress were systematically analyzed. Based on fractional-order calculus theory, a nonlinear viscoelastic-plastic creep model that incorporates temperature effects was developed, and its parameters were identified and validated. The results indicate that the creep behavior of SLCB exhibits typical three-stage characteristics—deceleration, steady-state, and acceleration—with curing temperature exerting a significant influence. As the temperature increased from 5 °C to 50 °C, the total creep duration extended by a factor of 2.58, the critical stress threshold was elevated, and creep resistance was enhanced. Both instantaneous strain and extreme creep strain decreased linearly with increasing temperature, exhibiting maximum reductions of 45.86% and 32.93%, respectively. The long-term strength, determined jointly from isochronous stress-strain curves and the steady-state creep rate method, maintained a stable ratio of approximately 75% relative to the peak strength, a ratio which was minimally influenced by temperature. The developed fractional-order creep model demonstrates high-precision fitting of the full-stage creep curves across different temperatures and effectively characterizes the coupling effects of temperature, stress, and time. The findings provide critical guidance for the design and assessment of backfill structures subjected to high-temperature environments. • Preparation of Alkali-Activated Slag-Loess Based Cemented Backfill Material • Influence of Curing Temperature on the Creep Deformation Characteristics of SLCB Materials • Quantified the linear relationship between temperature, long-term strength, and creep failure strength. • A fractional-order creep constitutive model for SLCB materials under three-dimensional stress states.

The long-term conservation of historic textiles, with their fragile organic fibers and susceptibility to degradation, presents a significant challenge within museum settings. This study investigates an integrated model��the Digital Twin for Sustainable Exhibition (DTSE)��to address the conflict between the physical preservation needs of textile artifacts and the environmental impact of their exhibition. The core thesis is that a high-fidelity digital twin, capturing not only the visual pattern but also the micro-geometry of the weave structure and material condition, serves as a foundational enabler for green exhibition design. The methodology employs a comparative scenario analysis, grounded in Life Cycle Assessment (LCA) principles, to quantify the potential environmental footprint of exhibiting historic silk artifacts, using the China National Silk Museum in Zhejiang as a representative case. Data for traditional exhibitions using MDF and halogen lighting are contrasted with the DTSE model, which minimizes the display of original textiles and utilizes sustainable materials such as bamboo panels and LED lighting. The results indicate that this approach can reduce an exhibition��s carbon footprint by an estimated 40�C60%, achieved through the strategic reduction of physical display infrastructure and energy loads, while simultaneously mitigating the physical and environmental stresses on the textiles. Consequently, the DTSE model offers a synergistic solution that enhances textile conservation by limiting physical exposure while advancing sustainability. This approach is highly replicable, providing a scalable framework for the preservation of a wide range of historic textiles and other delicate cultural heritage materials.

Aqueous zinc-ion batteries (AZIBs) demonstrate irreplaceable application prospects in large-scale energy storage due to their inherent safety, low cost, and high theoretical capacity. However, issues such as dendritic disorderly growth, hydrogen evolution reaction (HER), and corrosion of zinc anodes severely compromise electrode structural integrity, becoming a core bottleneck restricting the commercialization of AZIBs. To achieve efficient protection of zinc anodes, study employed room-temperature immersion deposition using metal nitrate as precursors to construct a Zn@M metallic deposited modification layer on zinc foil surfaces, forming an integrated physical barrier and chemically regulated protective system. The metallic modification layer provides comprehensive protection through multiple synergistic mechanisms: the conductive network co-constructed by homogenizes interfacial electric field distribution and Zn2+ ion flux, while their synergistic effect guides zinc deposition preferentially along thermodynamically stable (101) crystal planes, fundamentally suppressing dendritic growth. Additionally, this modification layer restructures Zn2+ solvation structures, reduces free water activity, and significantly inhibits side reactions such as HER and corrosion. This study proposes a simple, efficient, and cost-controlled bimetallic co-modification strategy for zinc anodes, elucidating an integrated protective mechanism of "electric field optimization-crystal plane orientation control-interfacial stabilization-side reaction inhibition", laying a critical foundation for the practical application of high-performance aqueous zinc-ion batteries (AZIBs).