Construction and Building Materials最新文献

{"title":"Experimental and modelling investigation of stress-strain behavior of basalt fiber-reinforced coral aggregate concrete under uniaxial and triaxial compression","authors":"Youwei Zhou ,&nbsp;Jianzhuang Xiao ,&nbsp;Zhiheng Deng ,&nbsp;Haifeng Yang ,&nbsp;Junjie Mei ,&nbsp;Jiapei Huang","doi":"10.1016/j.conbuildmat.2025.143856","DOIUrl":"10.1016/j.conbuildmat.2025.143856","url":null,"abstract":"<div><div>The use of basalt fibre-reinforced coral aggregate concrete (BFRCAC) facilitates the sustainable utilization of coral waste and helps mitigate terrestrial sand and gravel shortages. In addition, concrete structures experience complex multiaxial stress states in service. Therefore, uniaxial and triaxial compression tests were conducted to examine the influence of the confining pressure ratio, basalt fiber (BF) content, and concrete strength grade on the mechanical performance of BFRCAC. The test results showed that the confining pressure altered the failure pattern of BFRCAC, indicating that it was the most influential factor. An increase in the confining pressure ratio significantly enhanced the characteristic parameters of the stress–strain curves of specimens with different strength grades. The increments in peak stress, peak strain, initial elastic modulus, and compressive toughness were 248.09 %, 250.72 %, 52.62 %, and 1570.44 %, respectively. The incorporation of BFs effectively reduced the degree of failure and enhanced the mechanical properties of the specimens, particularly post-peak compressive toughness, with an optimal fiber content of 0.8 %. Meanwhile, the reinforcing effect of BFs was more pronounced under low confining pressure. However, an increase in either strength grade or confining pressure ratio diminished this reinforcing effect. Finally, a damage constitutive model applicable to various confining pressure ratios, basalt fiber contents, and concrete strength grades was established, and expressions for key mechanical parameters were derived. The proposed model can accurately predict both the stress–strain development and damage evolution of BFRCAC under uniaxial and triaxial compression, providing a theoretical basis for its engineering application.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"496 ","pages":"Article 143856"},"PeriodicalIF":8.0,"publicationDate":"2025-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218699","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of Na₂CO₃/NaOH on properties of titanium gypsum-ground granulated blast furnace slag based composite cementitious materials","authors":"Yue Chen ,&nbsp;Hongrui Ma ,&nbsp;Chunyang Ye ,&nbsp;Mingfang Ba","doi":"10.1016/j.conbuildmat.2025.143855","DOIUrl":"10.1016/j.conbuildmat.2025.143855","url":null,"abstract":"<div><div>This study highlights the novelty of utilizing titanium gypsum (RG), an industrial solid waste with limited current applications, as the primary component in alkali-activated composite cementitious materials. The binary alkaline activation system (Na₂CO₃/NaOH) with different alkalinity (mass percentage of Na₂O) and molar ratios of Na₂CO₃ and NaOH was adopted, and its influence on the properties of titanium gypsum-ground granulated blast furnace slag (RG-GGBS) composite cementitious materials was explored in depth. The results show that increasing the Na₂CO₃/NaOH molar ratio improves fluidity, setting times, mechanical strength, and significantly reduces autogenous expansion strain. This improvement is mainly due to the binary activator suppressing ettringite formation and promoting the generation of Calcium (Alumino) Silicate Hydrate (C-(A)-S-H) by providing more nucleation sites, thereby reducing harmful porosity. However, higher alkalinity leads to concentrated heat release, resulting in more microcracks. Excessively high pH levels also hinder precursor dissolution, limiting hydration reactions and reducing aluminosilicate formation, which further degrades the pore structure. In addition, compared with single NaOH activation, the binary activator system offers better volume stability and environmental performance, with the optimal conditions—Na₂CO₃/NaOH molar ratio of 4:6 and an alkalinity of 4 %—achieving the best combination of fluidity, strength, and stability. In summary, these findings provide valuable technical support for the effective utilization of titanium gypsum as building materials.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"496 ","pages":"Article 143855"},"PeriodicalIF":8.0,"publicationDate":"2025-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218697","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dynamic performance and structural evolution of corroded ultra-high performance concrete with initial defects under impact loading","authors":"Zhaoping Song ,&nbsp;Qingliang Yu ,&nbsp;Shaohua Li ,&nbsp;Yongli Liu","doi":"10.1016/j.conbuildmat.2025.143792","DOIUrl":"10.1016/j.conbuildmat.2025.143792","url":null,"abstract":"<div><div>This study addresses the dynamic performance and macro-micro structural evolution of corroded ultra-high performance fiber reinforced concrete (UHPFRC) with initial defects under high-speed impact loading. Integrated multi-scale experimental characterization (BSE, MIP, Nanoindentation and SHPB, etc.) and numerical simulation are employed to investigate the dynamic mechanical behavior and structural evolution of the damaged UHPFRC. Results show that initial defects induce micro-cracks and provide corrosion deterioration channels, leading to a more remarkable decrease in P-wave velocity and substantial loss of nano-mechanical strength in matrix and steel fiber. The MIP analysis reveals that the coupling effects of cracking and corrosion damage introduce a larger proportion of pores, the pore volume in the range of pore size larger than 100 nm rises, the dV/logD curves shift to high and gradually refine to multiple peaks. In terms of mechanical properties, coupling damages of initial defects and corrosion have a detrimental effect on the dynamic mechanical response. The HJC constitutive model in LS-DYNA is applied for the first time to describe the dynamic behavior of the various corroded UHPFRC containing initial defects, which is successfully validated to reliably predict the failure modes under different impact loading. The study benefits to better understanding prior to the design and application of impact-resistant UHPFRC.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"496 ","pages":"Article 143792"},"PeriodicalIF":8.0,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218412","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sustainable development of ternary binder-based mortar using OPC, GGBFS, and Coal Bottom Ash","authors":"Soumyaranjan Panda ,&nbsp;Monalin Pradhan ,&nbsp;Saubhagya Kumar Panigrahi","doi":"10.1016/j.conbuildmat.2025.143862","DOIUrl":"10.1016/j.conbuildmat.2025.143862","url":null,"abstract":"<div><div>The production of Ordinary Portland Cement (OPC) is responsible for 5–8 % of global CO₂ emissions and requires 4–5 GJ of energy per ton, emphasizing the need for sustainable alternatives. This study investigates a ternary blended binder mortar system composed of OPC, Ground Granulated Blast Furnace Slag (GGBFS), and Coal Bottom Ash (CBA) to reduce clinker demand while improving performance. Six mixes were developed with a predefined 30 % GGBFS content, and OPC was progressively replaced with 5–25 % CBA. The mixes were evaluated for fresh, mechanical, durability, and microstructural properties, with statistical validation and sustainability assessments. The mix with 15 % CBA (OPC:GGBFS:CBA is 55:30:15) was identified as optimal, achieving an 8–10 % increase in compressive strength (with greater gains at later ages), up to 20 % improvement in durability indices, and denser microstructural development compared to the control mix. Sustainability analysis exhibited a 16.79 % reduction in embodied energy, 19.92 % lower CO₂ emissions, and 10.13 % cost savings. The novelty of this work lies in demonstrating the synergistic role of CBA with GGBFS in ternary systems, where CBA’s utilization improves both performance and sustainability in mortar applications. The findings establish OPC:GGBFS:CBA with a 55:30:15 proportion as an optimized and statistically validated mix; however, it is also revealing that CBA incorporation up to 20 % is permissible without compromising mix-performance. This confirms the potential of OPC–GGBFS–CBA blends as durable, cost-effective, and eco-efficient alternatives for sustainable mortar production.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"496 ","pages":"Article 143862"},"PeriodicalIF":8.0,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218573","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The influence of NaOH incorporation on the hydration process and properties of type II fluorgypsum","authors":"Haoran Chen ,&nbsp;Huajun Zhu ,&nbsp;Qisheng Wu ,&nbsp;Zheyu Zhu ,&nbsp;Miaomiao Wang ,&nbsp;Jiale Zhu","doi":"10.1016/j.conbuildmat.2025.143833","DOIUrl":"10.1016/j.conbuildmat.2025.143833","url":null,"abstract":"<div><div>Fluorogypsum, an industrial byproduct classified as Type II anhydrite, faces limitations in its resource utilization due to its poor hydration activity and low early strength. Theoretically, alkali, which has been proven to possess potential activation properties in cement systems, can be applied to Type II anhydrite systems. This study aims to investigate the effects of different NaOH dosages on the compressive strength, hydration process, and microstructure of hydration products of fluoropgypsum, while explaining the enhancement mechanism from the perspective of hydration kinetics. The results demonstrate that the addition of NaOH significantly improves the compressive strength of fluorogypsum. When the NaOH dosage is 1.2 %, the 7-day compressive strength of modified fluorogypsum reaches 23.7 MPa, representing a 270.3 % increase compared to pure fluorogypsum samples. The addition of NaOH to fluorogypsum increases its early hydration degree and rate constant K. This accelerates the reaction between fluorogypsum and water, forming more hydration products. NaOH also participates in the growth process of hydration products. It increases the N value and affects the growth rates of dihydrate gypsum along different crystal axes. This promotes the transformation of dihydrate gypsum from plate-like to prismatic shapes. The hydration products become more tightly interconnected, creating a denser structure. The increased amount of hydration products and the denser structure contribute to the improved compressive strength of fluorogypsum hardened bodies.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"496 ","pages":"Article 143833"},"PeriodicalIF":8.0,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218864","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A sustainable method for preparing lightweight, high-strength, and dimensionally stable superfine bamboo fiber composites","authors":"Caimei Liu ,&nbsp;Linbi Chen ,&nbsp;Yuanshuo Huang ,&nbsp;Xiubo Liu ,&nbsp;Xianjun Li ,&nbsp;Xiazhen Li ,&nbsp;Xizhi Wu","doi":"10.1016/j.conbuildmat.2025.143813","DOIUrl":"10.1016/j.conbuildmat.2025.143813","url":null,"abstract":"<div><div>Bamboo fiber composites present an environmentally friendly and sustainable building material. However, traditional methods for preparing bamboo fibers often result in incomplete rolling and uneven fluffing, leading to intact vessels and sieve tubes, as well as an uneven distribution of Phenol-Formaldehyde (PF) resin. These shortcomings cause defects such as cracking and deformation bamboo fiber composites during the application. To address this, a sustainable manufacturing process for superfine bamboo fiber composites was developed. Bamboo strips were pretreated with saturated steam; and then fluffed by the multifunctional fluffer, yielding hair-sized superfine bamboo fibers. Subsequent these fibers were impregnated with Phenol-Formaldehyde (PF) resin, and hot-pressed into lightweight, high-strength, and dimensionally stable superfine bamboo fiber composites (SBFC). Results demonstrate that the average cross-sectional area of bamboo fibers in SBFC measured 0.099 mm², which merely was 10.26 % of common bamboo fiber, demonstrating significant refinement. Compared with conventional bamboo fiber composites (CBFC), SBFC shows 31.6 % higher flexural strength, 25.0 % greater surface hardness, 44.4 % lower surface roughness, 67.1 % reduced water absorption, 59.5 % decreased thickness swelling, and a 38.2 % increase in 30 s surface contact angle. These enhancements reflect substantially improved physical-mechanical properties. These enhancements reflect substantially improved physical-mechanical properties. Furthermore, SBFC also exhibits superior ratio of strength to weight and surface hardness compared with some structural materials with excellent mechanical properties. This work presents high-performance SBFC in a sustainable method, advancing bamboo’s utilization in building engineering applications.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"496 ","pages":"Article 143813"},"PeriodicalIF":8.0,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218511","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study on the modification of You-Man as the traditional adhesive material for the ground layer in polychrome painting of ancient chinese architecture","authors":"Wenjie Zhang ,&nbsp;Xiangna Han ,&nbsp;Hong Guo ,&nbsp;Zhenwei Cao","doi":"10.1016/j.conbuildmat.2025.143831","DOIUrl":"10.1016/j.conbuildmat.2025.143831","url":null,"abstract":"<div><div>You-Man, a traditional adhesive material in polychrome painting of Ancient Chinese architectural, is made by mixing tung oil, flour, and lime water. However, You-man has notable shortcomings, including a long drying time and poor aging resistance, which can lead to cracking and peeling of the pigment layer in architectural polychrome painting, thereby affecting the lifespan of the painted cultural heritage. This study aims to obtain a modified You-Man with a shorter drying time and better weather resistance by adding various functional modification materials, such as toluene diisocyanate (TDI), silica, and bentonite. The modified You-Man from the three groups were evaluated for drying time, hardness, adhesion, hydrophobicity, thermal expansion coefficient, moisture expansion coefficient, moisture absorption, and aging resistance. Comprehensive performance evaluations revealed that group Modified You-Man 2 (MYM-2, is composed of 58.00 % You-Man, 2.00 % TDI, and 40.00 % silica), demonstrated the best performance: compared to traditional You-man, the drying time was reduced by 75.00 %, the thermal expansion coefficient decreased by 48.69 %; the moisture expansion coefficient decreased by 51.79 %. Furthermore, no significant structural damage was observed after 100 days of accelerated aging experiment. MYM-2 has been initially used for the restoration of the polychrome painting on ancient architecture in the Forbidden City, and after nearly two years of outdoor testing, it has shown promising results. Notably, this study introduces a novel approach combining thermomechanical analyzer (TMA) and module of humidity generation (MHG) to test the thermal and moisture expansion coefficients of key You-Man and wooden substrates, providing valuable guidance for assessing the weather resistance of the modified You-Man.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"496 ","pages":"Article 143831"},"PeriodicalIF":8.0,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218568","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"One-step biomimetic construction of bio-based, robust and superhydrophobic coatings for simultaneously enhancing the surface functionality and passive fire-proof of steel structures","authors":"Haidi Li ,&nbsp;Xinqiang Wu ,&nbsp;Zhenlin Tang ,&nbsp;Mengru Zhang ,&nbsp;Zaihang Zheng ,&nbsp;Yan Liu","doi":"10.1016/j.conbuildmat.2025.143815","DOIUrl":"10.1016/j.conbuildmat.2025.143815","url":null,"abstract":"<div><div>In contemporary application, the conflict between optimal fire resistance and adequate surface functionality in conventional coatings for steel structures became increasingly prominent. Aimed at addressing the critical challenge associated with steel materials, the introduction of multifunctional coatings emerged as an effective and practical strategy. Limited by the restricted requirement from environment and ecology, the renewable fillers and clean materials aroused more and more attention in preparing the fire-retardant coatings with multiple surface functionality on steel structures. Bio-inspired by natural phenomena, super-hydrophobic coatings were constructed on steel structures via an one-step spraying method that the combination of as-prepared phytic acid/ZIF-8 hybrids (S-MPA@ZIF-8), titanium dioxide (TiO₂) and epoxy resin/silicone resin (EP/SR) was involved in the coatings. These components were expected to act as flame retardants, fillers and adhesive, respectively. The composite coatings could achieve the excellent water repellency, self-cleaning and anti-icing ability with water contact angle (WCA) of 162.3°±1° and water sliding angle (WSA) of 3°±0.2°, which were ascribed to the formation of adequate surface roughness with low surface energy. The superhydrophobic composite coatings maintained the superhydrophobicity even after 5 m abrasion distance and 250 tape peeling cycles owing to the native rigidity of TiO₂. Based on the chemical stability of SR, the water repellency of as-prepared coatings was exhibited after immersing in acid/alkaline solution for 24 h and undergoing 6 plasma etching cycles. This indicated that the superhydrophobic coatings possessed the remarkable mechanical durability, chemical stability, and weather resistance. Accorded with the charring ability of S-MPA@ZIF-8 and the reinforcing effect of TiO₂, the equilibrium backside temperature of coated steel structure during flame impact tests was as low as 203.2 °C, suggesting the excellent fire resistance of as-prepared coatings. In a nutshell, this study provided a viable, clean and effective strategy for enhancing the surface functionality and fire resistance, which was expected to raise the application value of steel structures in fields of aerospace industry, construction and buildings.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"496 ","pages":"Article 143815"},"PeriodicalIF":8.0,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218566","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fatigue and corrosion interaction: Performance evolution mechanisms in reinforced concrete beams strengthened with CFRP anchorage system","authors":"Yujue Zhou ,&nbsp;Minsu Wang ,&nbsp;Yuezong Lian ,&nbsp;Ning Yang ,&nbsp;Yongcheng Liu ,&nbsp;Wuhua Zeng","doi":"10.1016/j.conbuildmat.2025.143784","DOIUrl":"10.1016/j.conbuildmat.2025.143784","url":null,"abstract":"<div><div>The strengthening method of using externally bonded (EB) carbon fiber reinforced polymer (CFRP) sheets anchored by CFRP spikes has demonstrated effectiveness in retrofitting the structural capacity of reinforced concrete (RC) structural components. While previous studies have addressed the individual effects of sustained loading or corrosion damage, the coupled effect of multiple degradation factors remains insufficiently explored. In coastal environments, reinforced concrete infrastructure simultaneously experiences chloride-induced corrosion and fatigue loading, creating complex deterioration processes. As a result, the performance analysis of CFRP anchorage system needs to be more definitive. The main objective of this study is to explore the feasibility of a CFRP anchorage system suffering from the coupled effects of corrosion and fatigue. An analysis of the interaction between steel corrosion and the cracking induced by the continuous fatigue effect is presented. Moreover, the performance assessment of an illustrative example showed that the coupled fatigue-corrosion effects significantly reduced the fatigue life of RC beams. Finally, the fractal dimension of cracks, load-carrying capacity, deflection, ductility, stiffness and failure modes of the beams were investigated to assess the effectiveness of CFRP anchor systems in restoring RC structural capacity. The results indicated that the effects of coupled corrosion and fatigue are non-negligible and that the CFRP anchorage system effectively restores the capacity of structures subjected to long-term degradation processes induced by corrosion-fatigue coupling effects.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"496 ","pages":"Article 143784"},"PeriodicalIF":8.0,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Research on shear mechanical properties of Eucalyptus scrimber and Ginkgo scrimber under different temperature conditions","authors":"Hangyu Li ,&nbsp;Haitao Li ,&nbsp;Shuai Liu ,&nbsp;Mengzheng Cui ,&nbsp;Haitao Ke ,&nbsp;Pin Zhou","doi":"10.1016/j.conbuildmat.2025.143791","DOIUrl":"10.1016/j.conbuildmat.2025.143791","url":null,"abstract":"<div><div>In response to the intensification of global warming, the utilization of wood as a renewable resource in the construction sector has garnered widespread interest. Nevertheless, the efficient application of fast-growing timber is hindered due to its inherent drawbacks, including lower strength and susceptibility to decay. As an engineered wood composite, scrimber has emerged as a solution to significantly augment mechanical properties through structural reconstitution. This study investigated <em>Eucalyptus</em> scrimber (ES) and <em>Ginkgo</em> scrimber (GS) as the research subjects, comprehensively analyzing their failure modes, mass loss rate, load-displacement curves and shear strength under different temperatures. Shear tests and Scanning Electron Microscopy (SEM) were employed to elucidate the variation patterns of mechanical properties and microstructural responses across nine temperature gradients from −20 °C to 260 °C. The results demonstrate that the failure modes of scrimber can be divided into fiber shearing failure and fiber tearing failure; under relatively high temperatures, scrimber exhibits the adhesive failure. The mass loss of scrimber increases with rising temperature, and the variation of mass loss rate with temperature for ES and GS parallel to the grain under different temperature conditions can be predicted using a fitted model. Generally, shear strength shows a tendency to decrease with rising temperature across the entire gradient. Observations via SEM have revealed the microstructural characteristics associated with each failure mode, and have further clarified the influence of temperature on the shear strength of scrimber from a microscopic perspective. By improving the model used to predict that the shear strength of softwood under high temperatures follows a bilinear variation, the model is made to adapt with the material characteristics of scrimber. The Hyperbolic Tangent Model is applied to more accurately predict the changes in the shear properties of scrimber under different temperature conditions. This study establishes a correlation between microstructural damage evolution and macroscale mechanical degradation, providing essential empirical data and predictive models to guide the engineering design of scrimber in different temperature environments.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"496 ","pages":"Article 143791"},"PeriodicalIF":8.0,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218868","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}