Construction and Building Materials最新文献

{"title":"Influences of elevated temperature and re-curing on the compressive performance of lightweight concrete containing metakaolin: Experiments and prediction models","authors":"Seyedrasoul Nabavian ,&nbsp;Mohammad Asghari Shirvani ,&nbsp;Aliakbar Gholampour","doi":"10.1016/j.conbuildmat.2025.142111","DOIUrl":"10.1016/j.conbuildmat.2025.142111","url":null,"abstract":"<div><div>The influence of elevated temperatures on the compressive behavior of lightweight concrete (LWC) has become a topic of interest due to the importance of safety assessment, fire-resistant design, and repair of structures affected by fire. However, there has been a lack of research about the water re-curing of thermally compromised concrete. Therefore, the current study aims to investigate the impact of elevated temperatures and water re-curing on the compressive performance of LWC with different proportions of metakaolin (0, 5, 10, 15, and 20 %). The LWCs were heated at temperatures of 300 and 600 °C, followed by the application of water re-curing process. Then, further degradation and recovery of the LWCs were examined. The LWC performance was explored through calculating the axial stress-strain response and mechanical parameters such as toughness, modulus of elasticity and compressive strength. Fracture mode and visual observations were also studied. The results indicate that there is a remarkable decline in the mechanical features of the LWCs by increasing temperature. At 600 °C, the most significant deterioration is observed with average reductions of 24 %, 65 % and 39 % in toughness, modulus of elasticity and compressive strength, respectively. The LWC with metakaolin exhibits superior behavior at high temperatures compared to the LWC without metakaolin. The water re-curing improves the mechanical performance of the LWCs. The recovery of strength, toughness and modulus of elasticity for the LWCs at the investigated temperatures are 11–26 %, 8–28 %, and 4–50 %, respectively. Besides, models are presented to forecast the mechanical features of the LWCs with metakaolin under elevated temperatures. The predicted outcomes display appropriate accuracy compared to the present experimental results and those of other researchers. Ultimately, response surface method is employed to identify the optimum design parameters.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"489 ","pages":"Article 142111"},"PeriodicalIF":7.4,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144254615","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":"Humidity and temperature control performance of metal organic frameworks and microencapsulated PCMs composite material","authors":"Zhaohua Wang,&nbsp;Sayma Sathi,&nbsp;Xiaofeng Niu,&nbsp;Qikang Tian,&nbsp;Gang Zhang,&nbsp;Jinming Zhao","doi":"10.1016/j.conbuildmat.2025.142186","DOIUrl":"10.1016/j.conbuildmat.2025.142186","url":null,"abstract":"<div><div>Building materials capable of simultaneously regulating temperature and humidity play a vital role in enhancing energy efficiency in built environments. This study introduces a novel composite material that integrates moisture-absorbing metal–organic frameworks with temperature-regulating microencapsulated phase change materials. A series of experiments were conducted to evaluate the ability of these composites to buffer indoor humidity at various mass ratios. The optimal composition was found to be 80 percent metal–organic frameworks by mass, offering superior humidity regulation performance. Notably, the composite exhibited enhanced moisture absorption and release during sudden changes in ambient humidity, which is attributed to the isothermal heat transfer effect provided by the microencapsulated phase change material. Further experiments on the optimal formulation examined the material’s humidity control performance under varying temperature conditions, revealing that moisture absorption capacity improved with rising temperature. Additionally, when the composite material was compacted under different pressures, a slight reduction in humidity buffering performance was observed, which then stabilized. Finally, a simulation study assessed the energy-saving potential of applying this composite in building envelopes. The results demonstrated excellent dual temperature and humidity regulation capabilities across two representative climate zones. However, performance varied depending on the building type, with a maximum energy-saving rate of 11.6 percent achieved in lightweight structures.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"489 ","pages":"Article 142186"},"PeriodicalIF":7.4,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144254613","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 uniaxial tensile mechanical properties and damage constitutive model of SAP-PVA fiber-reinforced concrete after high-temperature exposure","authors":"Faxiang Xie ,&nbsp;Wenhao Cao ,&nbsp;Ziheng Jin","doi":"10.1016/j.conbuildmat.2025.142189","DOIUrl":"10.1016/j.conbuildmat.2025.142189","url":null,"abstract":"<div><div>To investigate the high-temperature tensile performance and damage characteristics of superabsorbent polymer (SAP)-internally cured polyvinyl alcohol (PVA) fiber-reinforced concrete (SAP-PVAC), concrete specimens subjected to four temperature gradients were designed and tested under static uniaxial tension. The tensile mechanical properties of SAP-PVAC under both ambient and elevated temperatures were analyzed. Based on the equivalent strain hypothesis, a thermomechanical coupled damage constitutive model and damage evolution equation were established. Experimental results revealed that at ambient temperature, SAP released water to promote hydration, reducing capillary pores and other defects, while PVA fibers formed chemical bonds and mechanical interlocking with the matrix, synergistically enhancing interfacial bonding and crack resistance. However, under high-temperature exposure, the mechanical properties of SAP-PVAC degraded significantly while tensile deformation capacity increased because SAP dehydration induced shrinkage pores, and PVA fiber melting (∼239°C) led to the loss of fiber bridging. Nevertheless, prior to melting, PVA fibers delayed crack propagation through plastic elongation, shifting the failure mode from brittle to ductile. Empirical equations for post-high-temperature residual strength, peak strain, and elastic modulus were proposed based on experimental data. And the developed thermomechanical coupled damage constitutive model effectively predicted the post-high-temperature mechanical behavior and post-peak softening of SAP-PVAC. This study elucidates the high-temperature degradation mechanisms of SAP-PVAC at both macro- and micro-scale levels, providing theoretical references for the design and application of SAP-PVAC structural elements in high-temperature environments.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"489 ","pages":"Article 142189"},"PeriodicalIF":7.4,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144263464","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":"Mesoscale modeling of anisotropic compressive behavior and pull-out performance of 3D printed concrete with steel bars using 3D RBSM","authors":"Jiaxu Yao ,&nbsp;Jie Luo ,&nbsp;Minghong Qiu ,&nbsp;Kohei Nagai","doi":"10.1016/j.conbuildmat.2025.142214","DOIUrl":"10.1016/j.conbuildmat.2025.142214","url":null,"abstract":"<div><div>This study explores the anisotropic compressive behavior and pull-out performance of 3D-printed concrete (3DPC) with a steel bar. The layer-by-layer deposition process used for 3DPC introduces a unique mesoscale structure consisting of interlayer interfaces, layer orientation, and adhesive transition zones characterized by high porosity. Numerical simulations implemented with a mesoscale 3D Rigid Body Spring Model (RBSM) were validated against experimental data, demonstrating the proposed model's ability to replicate the anisotropic behavior of 3DPC under various loading and pull-out conditions. For the compressive behavior of 3DPC, results show that specimens loaded parallel to the printing direction exhibit higher strength and bond performance, while those loaded perpendicular perform worse due to stress concentrations and weak adhesive transition zones. The pull-out tests further revealed that the bond strength of a steel bar embedded in 3DPC depends on orientation relative to the printed layers, with specimens aligned parallel to the printing direction outperforming those in the perpendicular direction due to reduced influence of interfacial weak zones. By integrating experimental validation and numerical simulations, this study offers insights into the role of mesoscale structure in determining the anisotropic behavior of 3DPC. This research provides a robust framework for predictive modeling and structural optimization of 3DPC.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"489 ","pages":"Article 142214"},"PeriodicalIF":7.4,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144253954","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":"Applicability of solidified soil induced by tuff-based geopolymer for ramming erosion area of earthen site","authors":"Dandan Li ,&nbsp;Yaling Chou ,&nbsp;Mingyi Zhang ,&nbsp;Wansheng Pei ,&nbsp;Erxing Peng ,&nbsp;Xiaoying Hu ,&nbsp;Zhongqiong Zhang","doi":"10.1016/j.conbuildmat.2025.142212","DOIUrl":"10.1016/j.conbuildmat.2025.142212","url":null,"abstract":"<div><div>In northwest China, the erosion diseases of earthen sites are severe, and ramming is a common protective method. To improve the durability of the ramming section, the applicability of solidified soil induced by tuff-based geopolymer was explored through a series of tests. The results show that, with the dosage of tuff powder, the concentration of potassium hydroxide and sodium silicate increasing, the unconfined compressive strength of the solidified soil first increases and then decreases, the disintegration mass decreases, and the color difference increases. The shrinkage rate decreases with the increase of tuff powder dosage and potassium hydroxide concentration but increases with the sodium silicate concentration increasing. Through optimization analysis, the optimal proportions of tuff powder dosage, concentration of potassium hydroxide and sodium silicate were determined to be 12 %, 3.4 mol/L, and 0.3 mol/L, respectively. Under the above condition, unconfined compressive strength, disintegration mass, shrinkage rate, and color difference were 4.41 MPa, 10.77 g, 0.97 %, and 2.31, respectively, which meet the requirements of earthen site reinforcement. For the solidified mechanism of tuff-based geopolymer, potassium hydroxide and sodium silicate can dissolve some minerals in the tuff powder and loess. Sodium silicaluminate hydrate, potassium silicaluminate hydrate, and calcium silicate hydrate gel are generated, which fills the soil pores and bonds the soil particles to effectively enhance the properties of the soil. This study will provide a material proportioning scheme and theoretical support for the treatment of erosion diseases in earthen sites.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"489 ","pages":"Article 142212"},"PeriodicalIF":7.4,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144261268","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":"Wood moisture and temperature dependent impact-induced fracture toughness-brittle transition","authors":"Qing Wang ,&nbsp;Xinyu Song ,&nbsp;Lili Lu ,&nbsp;Jian Li ,&nbsp;Shan Gao","doi":"10.1016/j.conbuildmat.2025.142190","DOIUrl":"10.1016/j.conbuildmat.2025.142190","url":null,"abstract":"<div><div>As an engineering structural material, wood is increasingly demanded for its remarkable advantages. When exposed to shallow and deep cryogenic temperature environment environments, its mechanical properties deviate from those at normal temperature due to temperature-humidity effects. However, current research has paid little attention to the service failure risk caused by brittle fracture of wood in engineering applications, especially when subjected to unexpected impact stress in cold region. To fill this gap, the impact toughness (<em>A</em>_w) of <em>Populus ussuriensis</em> and <em>Larix gmelinii</em> wood under three humidity conditions was examined across a wide temperature range (-196 °C to 60 °C) to investigate their tough-brittle transition (TBT) characteristics. Results show that the impact fracture morphology of wood gradually presented brittle fracture characteristics with decreasing temperature, and higher moisture content (MC) accentuated these brittle characteristics. The <em>A</em>_w of both wood species decreased with temperature, with two inflection points around 0 °C and in the range of − 60 °C to − 40 °C. The temperature range of − 40 °C to − 60 °C was a critical zone where fracture properties of wood shift from toughness to brittleness, increasing the risk of brittle-fracture. A strong linear relationship existed between temperature and <em>A</em>_w for each MC level (<em>R</em>² ≥ 0.89). Additionally, a multivariate nonlinear model of <em>A</em>_w based on temperature and MC was developed with a high goodness of fit (<em>R</em>² ≥ 0.96). These findings lay a foundation for predicting brittle-fracture risks in wooden components and offer deeper insights into their mechanical behavior in cold-climate engineering applications.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"489 ","pages":"Article 142190"},"PeriodicalIF":7.4,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144261299","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":"Evaluation of shear strength improvement of recycled concrete aggregate as a high-quality pavement material utilizing CO2 carbonation treatment","authors":"Apinun Buritatum ,&nbsp;Suksun Horpibulsuk ,&nbsp;Apichat Suddeepong ,&nbsp;Teerasak Yaowarat ,&nbsp;Menglim Hoy ,&nbsp;Krairerk Aiamsri ,&nbsp;Kongsak Akkharawongwhatthana ,&nbsp;Arul Arulrajah","doi":"10.1016/j.conbuildmat.2025.142193","DOIUrl":"10.1016/j.conbuildmat.2025.142193","url":null,"abstract":"<div><div>This study investigates the performance enhancement of recycled concrete aggregate (RCA) through CO₂ carbonation. RCA samples were treated with varying CO₂ concentrations in the range of 20–60 % and curing durations (T) in the range of 24–72 h. A series of large-scale direct shear tests, combined with SEM and EDS analyses, were conducted to evaluate the mechanical and microstructural changes. The optimal carbonation condition was identified as 20 % CO₂ concentration with 72-hour curing, resulting in a 51.7 % increase in friction angle and a 13.0 % increase in cohesion. In contrast, higher CO₂ concentrations (40 % and 60 %) yielded reduced strength improvements, with 60 % CO₂ treatment exhibiting diminished effectiveness. Strength parameters increased rapidly within the first 24 h before plateauing with extended curing durations. SEM analysis revealed that the 20 % CO₂-treated RCA developed a dense and well-compacted microstructure, with CaCO₃ effectively filling pores and bridging microcracks, whereas the 60 % CO₂-treated sample exhibited excessive surface carbonation that restricted internal modification. EDS results supported these observations, showing minimal elemental intensities in untreated RCA, increased Ca and C levels in the 20 % CO₂-treated sample, and surface accumulation in the 60 % CO₂-treated sample with stable Si content. The 20 % CO₂-treated RCA achieved greater strength with lower dilatancy than the untreated RCA; however, both exhibited comparable residual strength, governed primarily by particle friction. A predictive polynomial model was developed to estimate the evolution of friction angle and cohesion across varying CO₂ concentrations and curing durations, and its accuracy was confirmed through validation using the 10 % CO₂-treated RCA sample, demonstrating its reliability for practical applications.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"489 ","pages":"Article 142193"},"PeriodicalIF":7.4,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144261304","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":"Experimental evaluation of magnetite powder and ilmenite powder as novel promising cementitious materials for eco-friendly high-performance mortar","authors":"Ahmed M. Tahwia ,&nbsp;May M. Atyia ,&nbsp;Khaled A. Eltawil","doi":"10.1016/j.conbuildmat.2025.142228","DOIUrl":"10.1016/j.conbuildmat.2025.142228","url":null,"abstract":"<div><div>In the quest for sustainable construction solutions<strong>,</strong> This study investigates the utilization of magnetite powder (MP) and ilmenite powder (IP), sourced from Egyptian black sand, as novel and environmentally sustainable substitutes for cement in high-performance mortar. Seven mortar mixes were developed, integrating MP and IP at substitution rates of 10 %, 20 %, and 30 %, and their physical, mechanical, and microstructural characteristics were meticulously assessed. The pozzolanic activity of MP and IP was confirmed using strength activity index (SAI) and thermogravimetric analysis (TGA), establishing their viability as supplemental cementitious materials (SCMs). The testing results indicated substantial enhancements in mortar performance. A 10 % substitution of cement with IP led to a 20 % enhancement in compressive strength relative to the control mix. Furthermore, MP-enhanced mortar maintained 85 % of its strength after exposure to 600°C, demonstrating exceptional fire resistance. Workability studies indicated that MP and IP enhanced flowability, resulting in flow widths increasing by as much as 15 %. Ultrasonic pulse velocity experiments corroborated improved microstructure density, especially at the 10 % replacement level. Advanced methodologies, including scanning electron microscopy (SEM) and X-ray diffraction (XRD), shown that MP and IP promote the synthesis of calcium silicate hydrate (C-S-H) gels, hence improving durability and diminishing porosity. These findings highlight the viability of MP and IP as sustainable alternatives to cement, providing superior mechanical qualities, fire resistance, and workability, while reducing the environmental footprint of construction materials. This study establishes a foundation for further research on the utilization of these materials in sustainable construction techniques.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"489 ","pages":"Article 142228"},"PeriodicalIF":7.4,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144261269","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":"Tire abrasion induced patterns of pavement reflectivity characteristics from lab to field","authors":"Zihang Weng ,&nbsp;Zhen Leng ,&nbsp;Yishun Li ,&nbsp;Chenglong Liu ,&nbsp;Difei Wu ,&nbsp;Yuchuan Du","doi":"10.1016/j.conbuildmat.2025.142222","DOIUrl":"10.1016/j.conbuildmat.2025.142222","url":null,"abstract":"<div><div>Pavement reflectivity is a critical parameter that characterizes a pavement surface's capacity to reflect solar radiation. This property is fundamentally associated with environmental challenges, particularly urban heat island effects. However, the distribution pattern of reflectivity and its decay behavior remain unclear due to the lack of rapid, large-scale sensing methods. This study aims to characterise the reflective features derived from laser-scanned data and investigate the abrasion-induced evolution patterns through laboratory and field tests. Statistical indicators and two-term Gaussian fits were proposed to describe the distribution of reflectance intensity. The <em>M</em>_weighted was selected as the primary indicator due to its strong consistency and linear correlation with optical reflectivity measurements (R²=0.908). Indoor and outdoor controlled experiments were designed to continuously track the reflectance decay under abrasion. In the laboratory test, a 1/3-scale Model Mobile Load Simulator was used to simulate tire abrasion on stone matrix asphalt (SMA) pavements. The results revealed a linear trend indicating that the pavement reflectivity increases with the progression of abrasion. In the field test, samples were collected from the left, right, and non-wheel tracks of eight expressway sections before and after preventive maintenance. The results show that the reflectivity of pavement tends to increase progressively in the early service time. The reflectivities of wheel tracks were lower than those of non-wheel tracks on the old road but higher than those on the newly paved road. This study paved the way for rapid and long-term assessment of pavement reflectivity, supporting research on cool and reflective pavements.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"489 ","pages":"Article 142222"},"PeriodicalIF":7.4,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144261303","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 basic properties and rejuvenation mechanism of wood tar-based rejuvenated asphalt","authors":"Juncai Zhu ,&nbsp;Kang Jiang ,&nbsp;Yuying Wang ,&nbsp;Wen Li ,&nbsp;Aijun Wang ,&nbsp;Kefei Liu ,&nbsp;Kun Zhang","doi":"10.1016/j.conbuildmat.2025.142206","DOIUrl":"10.1016/j.conbuildmat.2025.142206","url":null,"abstract":"<div><div>This study conducted a laboratory investigation to assess the effects and rejuvenation mechanism of wood tar-based rejuvenator (WTR) on the properties of aged 70# base asphalt and styrene-butadiene-styrene (SBS) modified asphalt, using a commercial rejuvenator RA-102 as a reference. The conventional physical properties (penetration, ductility, softening point, and viscosity), high and low temperature rheological properties, composition, chemical characteristics, and microscopic characteristics of asphalt under different aging states were tested. The results show that WTR and RA-102 rejuvenator can enhance the penetration, ductility, phase angle <em>δ</em>, and creep rate (<em>m</em>-value) of aged asphalts, but reduce their softening point, viscosity, complex modulus <em>G*</em>, and creep stiffness (<em>S</em>-value). Meanwhile, both rejuvenators can reduce the stiffness and increase the proportion of viscous components of aged asphalt, making the values of <em>△T</em>_c and the continuous low-temperature grade controlled by the <em>m</em>-value and approach those of the original asphalt. Notably, the joint modification effects of wood tar and bamboo fiber make wood tar-based rejuvenated asphalt (WTRA) have better high-temperature performance but slightly lower low-temperature performance than RA-102 rejuvenated asphalt. The WTR primarily rejuvenates aged asphalt through physical blending by replenishing light components, reducing gel index <em>I</em>_C value, and improving microstructural uniformity via the mitigation of wax crystal aggregation and the optimization of bee structure distribution. The results of grey correlation analysis reveal that the rejuvenation of aged asphalt performance by WTR is driven by synergistic changes in composition, chemical structure, and microscopic features, where the regulation of composition and colloidal structure play a dominant role. Overall, WTR demonstrates strong potential as a sustainable and effective rejuvenator for aged asphalt.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"489 ","pages":"Article 142206"},"PeriodicalIF":7.4,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144254215","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}