Construction and Building Materials最新文献

{"title":"In-situ analysis reveals the calcium ion paradox: Delayed passivation yet enhanced durability of rebar in concrete","authors":"Zuquan Jin ,&nbsp;Zheng Li ,&nbsp;Lihang Qian ,&nbsp;Haosen Jiang ,&nbsp;Xiaotong Wang ,&nbsp;Ning Li ,&nbsp;Xiaoying Zhang","doi":"10.1016/j.conbuildmat.2025.143971","DOIUrl":"10.1016/j.conbuildmat.2025.143971","url":null,"abstract":"<div><div>The nanoscale passive films (PF) on steel surface serve as the fundamental factor for reinforced concrete's corrosion resistance and durability. However, it is a challenge to elucidate the composition and formation mechanism of PF due to its intrinsic instability and constraints of conventional characterization techniques. In-situ GIXRD and electrochemical analysis was introduced to elucidate cation effects (Na⁺/K⁺/Ca²⁺) on PF composition, formation kinetics, reaction mechanisms and corrosion resistance in concrete pore solutions. Within pH 12.5 alkaline solution (NaOH/KOH/Ca(OH)₂), Na⁺/K⁺/Ca²⁺ drive passivation on pure Fe, where Na₃Fe₅O₉, K₆Fe₂O₆, and CaFe₂O₄ emerge as distinct dominant components. In addition, PF formation kinetics varied significantly among cations: complete film formation required 120 h in Ca(OH)₂ solution vs. 48 h in NaOH and KOH solutions, suggesting distinct reaction pathways. Passivation in NaOH/KOH involves three steps (Fe⁰→Fe⁺, Fe⁺→Fe²⁺, and Fe²⁺→Fe³⁺), while Ca(OH)₂ follows a two-step process (Fe⁰→Fe⁺ and Fe⁺→Fe³⁺). Paradoxically, despite its slower kinetics, the Ca²⁺-derived PF demonstrates significantly superior corrosion resistance (Ca(OH)₂ &gt; NaOH &gt; KOH). This work systematically elucidates the mechanisms underlying this delayed passivation yet enhanced durability phenomenon associated with Ca²⁺, providing crucial insights for improving concrete structure durability.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"498 ","pages":"Article 143971"},"PeriodicalIF":8.0,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145247962","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 and prediction on abrasion resistance of hydraulic concrete exposed to calcium leaching","authors":"Qian Chen ,&nbsp;Weizhun Jin ,&nbsp;Zhisheng Lv ,&nbsp;Fengbiao Hong ,&nbsp;Guibiao Hong ,&nbsp;Shu Chen ,&nbsp;Hongqiang Chu ,&nbsp;Linhua Jiang","doi":"10.1016/j.conbuildmat.2025.143980","DOIUrl":"10.1016/j.conbuildmat.2025.143980","url":null,"abstract":"<div><div>This study innovatively establishes quantitative correlations between calcium leaching depth and abrasion characteristics (abrasion depth, volume, and fractal dimension) of hydraulic concrete, investigating the abrasion resistance of hydraulic concrete exposed to calcium leaching. Scanning electron microscopy (SEM), X-ray diffraction analysis (XRD), thermogravimetric analysis (TG), and mercury intrusion porosimetry (MIP) were performed to monitor changes in hydrates and microstructure of cement pastes to dissect underlying mechanisms. A predictive model for the abrasion resistance of concrete under calcium leaching was developed using Gaussian process regression (GPR). The results show that abrasion depth, abrasion volume and fractal dimension of hydraulic concrete are increased with the increase of the degree of calcium leaching. The migration and transformation of calcium ions lead to a reduction in the calcium-to-silicon (Ca-Si) ratio and a morphological change in the C-S-H from fibrous to flaky, resulting in a weakened bonding ability between hydrates. Calcium leaching increases the porosity of concrete, and the abrasion enlarges the proportion of large pores, further intensifying the internal deterioration within the microstructure of concrete. Moreover, the GPR theory is used to establish the prediction model of the morphology index of concrete exposed to calcium leaching, and the predictive model is in general agreement with the experimental data, which has theoretical guiding significance for predicting the durability of hydraulic concrete.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"498 ","pages":"Article 143980"},"PeriodicalIF":8.0,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145247997","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":"Repurposing recycled walnut shell as an anti-aging agent into asphalt binder: A multi aspect evaluation","authors":"Abdulgazi Gedik","doi":"10.1016/j.conbuildmat.2025.143969","DOIUrl":"10.1016/j.conbuildmat.2025.143969","url":null,"abstract":"<div><div>Bitumen aging undermines road surface conditions by decreasing resistance to deformation and cracking, both of which eventually shorten the service life of asphalt pavements. Accordingly, the pavement scientific community has been exploring alternate research efforts through investigations of a wide range of biowastes that could serve as cost-saving, environmentally sustainable, and long-term effective anti-aging agents. In line with these efforts, the present study has been dedicated to scrutinizing the effects of incorporating recycled walnut shell as an antioxidant for asphalt binder. To this end, walnut shell powder (WSP) was first added to a straight 50/70 penetration bitumen at various concentrations (2 %, 4 %, 6 %, and 8 % by weight) by means of an ultra-high shear mixer. Next, the bio-binders and base bitumen were exposed to short- and long-term aging. The changes in physical, rheological, and chemical properties were analyzed as a means of comparing and contrasting the aging degree of WSP samples with that of the control binder. Consistency test results showed that adding WSP alleviated the hardening effect of the aging process. In contrast to the plain binder, WSP binders had better anti-aging performance as proven by the lower change in viscoelastic behavior, the decline in the formation of oxygenated products, and the improved resistance to thermal degradation. Decreasing the aging-related hardening and embrittlement, WSP significantly enhanced the bitumen’s fatigue resistance and low-temperature performance. Overall, this study provides insights into the extent to which the inclusion of WSP serves to reduce thermal-oxidative bitumen aging. Specifically, 8 %WSP was found to have the best age-retardation effect as evidenced by its lowest aging indices. Given WSP’s lignocellulosic composition and natural anti-oxidant properties, this study offers a new solution for improving the anti-aging performance of bitumen.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"498 ","pages":"Article 143969"},"PeriodicalIF":8.0,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145247960","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":"Chloride transport in concrete on the side of anchorage zone under drying-wetting cycles","authors":"Xiaokang Cheng ,&nbsp;Qingjun Mu ,&nbsp;Jianxin Peng ,&nbsp;Yiming Yang","doi":"10.1016/j.conbuildmat.2025.143869","DOIUrl":"10.1016/j.conbuildmat.2025.143869","url":null,"abstract":"<div><div>The intricate interplay between multidimensional stress states complicates chloride diffusion within concrete anchorage zones, thereby compromising the reliability of durability assessments for concrete structures. Initially, one-dimensional accelerated chloride diffusion experiments were carried out in the anchorage zone of prestressed concrete T-beams under drying–wetting cycles. The effects of drying–wetting cycle duration and the stress state of the concrete in the anchorage zone on chloride distribution were then examined. Subsequently, a numerical analysis method for the convection–diffusion of chloride ions in unsaturated concrete under multidimensional stress states was established using the finite volume method (FVM). The proposed numerical approach for chloride convection–diffusion was then validated with experimental data. Finally, the effects of different parameters on the chloride ion distribution in the concrete within the spalling stress zone and on the depth of the convection zone were investigated. The results showed that prolonged drying–wetting cycles amplified chloride ingress in both the local bearing stress zone and the splitting stress zone. When the longitudinal and vertical compressive stresses were less than or equal to 0.25 and 0.13 times the applied stress level, respectively, the chloride concentration decreased by an average of 17.6 %. When the longitudinal compressive stress, the vertical tensile stress, and the shear stress in the longitudinal–vertical plane were less than or equal to 0.20, 0.26, and 0.12 times the applied stress level, respectively, the average chloride concentration increased by 31.6 %. The proposed model demonstrated an improvement in prediction accuracy of approximately 11.7 % compared with existing numerical models reported in the literature. Compared with vertical tensile stress, surface chloride concentration, and initial moisture saturation, the dry–wet cycle ratio had a smaller effect on the chloride concentration distribution.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"498 ","pages":"Article 143869"},"PeriodicalIF":8.0,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145247961","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":"Introducing carbon nanotubes into concrete: a porosity-based characterization of dispersion","authors":"Yu Chen ,&nbsp;Kefan Zhou ,&nbsp;Sen Du","doi":"10.1016/j.conbuildmat.2025.143947","DOIUrl":"10.1016/j.conbuildmat.2025.143947","url":null,"abstract":"<div><div>Carbon nanotubes (CNTs) possess the significant ability to improve the properties and performances of cement-based materials, particularly when incorporated with a uniform dispersion. However, the effective characterization of the dispersibility of CNTs in the hardened cement-based materials remains a difficult task. In this study, a porosity-based approach was proposed to evaluate the dispersion of multi-walled carbon nanotubes (MWCNTs) in concrete based on backscattered electron imaging, in which the agglomerated MWCNTs are identified as pores. Moreover, the concept of agglomeration coefficient was introduced to quantify the extent of MWCNTs agglomeration in concrete. The content of carbon element was analyzed in concrete through energy-dispersive X-ray spectroscopy (EDS) to validate the proposed approach. Subsequently, compressive strength, water absorption, and freeze-thaw resistance of MWCNTs-modified concrete were investigated to further verify the effectiveness of the proposed method. At last, mercury intrusion porosimetry, X-ray diffraction and EDS were conducted to elucidated the underlying mechanism of the uniform dispersion of MWCNTs on the improvement of the performance of concrete.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"498 ","pages":"Article 143947"},"PeriodicalIF":8.0,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145247963","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":"Thermal damage mechanism of high geothermal tunnel lining concrete considering temperature gradient effects","authors":"Zhu Peng ,&nbsp;Chenghua Shi ,&nbsp;Chaojun Jia ,&nbsp;Keyue Zheng ,&nbsp;Yili Lou ,&nbsp;Tao Zhu ,&nbsp;Mingfeng Lei","doi":"10.1016/j.conbuildmat.2025.143963","DOIUrl":"10.1016/j.conbuildmat.2025.143963","url":null,"abstract":"<div><div>High geothermal tunnels impose complex temperature and humidity gradients on concrete linings due to intense unidirectional rock heating. This study developed a novel experimental system (MUGTCS) to accurately simulate full-stage gradient curing from pouring to hardening. We comprehensively investigated the spatiotemporal thermal damage effects on concrete's hydration, microstructure, and mechanical properties under various simulated temperatures and gradients. Experimental results demonstrate that unidirectional heating creates significant non-uniform damage across the lining thickness. Optimal early strength development occurs between 70 and 80°C, a phenomenon notably enhanced by higher humidity. Mechanism analysis reveals that coupled non-uniform hydration kinetics, differential thermal expansion, and microstructural degradation (including pore structure changes and ITZ weakening) are primarily responsible for the observed reduction in mechanical properties. This research highlights the critical role of continuous gradient curing from the initial molding stage, offering crucial insights for optimizing mix design and practical curing strategies in high geothermal tunnel environments.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"498 ","pages":"Article 143963"},"PeriodicalIF":8.0,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145247998","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 reinforcement mechanism and properties of polypropylene/ethylene-vinyl acetate blends replacing styrene-butadiene-styrene for degraded crumb rubber modified asphalt","authors":"Chen Cui ,&nbsp;Hongwei He ,&nbsp;Jie Ma ,&nbsp;Wenwen Yu ,&nbsp;Fengbo Zhu ,&nbsp;Huayun Du ,&nbsp;Lin Liao ,&nbsp;Bo Zhang ,&nbsp;Yinghua Fan","doi":"10.1016/j.conbuildmat.2025.143875","DOIUrl":"10.1016/j.conbuildmat.2025.143875","url":null,"abstract":"<div><div>Currently, the performance of asphalt pavement is greatly influenced by environmental temperature and load. Introducing polymer modifiers is an effective strategy to improve road performance. Styrene-Butadiene-Styrene (SBS) is the most widely used polymer modifier, but it is expensive. Therefore, reducing the SBS content or developing alternative materials is one of the effective solutions. In recent years, crumb rubber (CR), degraded crumb rubber (DCR) have been found to be effective, but their road performance and storage stability still need improvement. Waste plastics such as ethylene-vinyl acetate copolymer (EVA) and polypropylene (PP) have shown potential as asphalt modifiers, however, not much research has been done on how they work together with CR or DCR in asphalt. Therefore, this study uses the high temperature rutting resistance of PP and the low temperature anti-cracking of EVA to prepare DCR/PP/EVA composite modified asphalt (PEMA), aiming to improve the high and low temperature performance of asphalt. The effects on the microstructure and rheological properties of asphalt are explored, and the feasibility of PP/EVA replacing SBS is investigated. First, the influence of different PP/EVA ratios on the physical properties of asphalt was explored. The rheological properties and deformation resistance were evaluated using dynamic shear rheometer (DSR) and multiple stress creep and recovery (MSCR). In addition, the compatibility and microstructure of the composite modified asphalt were characterized by segregation experiments and microscopic techniques. The modification mechanism of PEMA was reasonably inferred using Fourier transform infrared spectroscopy (FTIR) and microstructure tests. The results showed that when the content of PP/EVA composite modifier was 6 wt% (PP:EVA = 5:5), its high temperature rutting resistance, low temperature anti-cracking, deformation resistance and elastic recovery ability were all better than SBS/DCR modified asphalt (SDCRMA). The cross linked network formed by DCR, PP and EVA greatly improved the storage stability, outperforming that of SDCRMA. The PP/EVA blend shows potential as a substitute for SBS in the preparation of modified asphalt. This study provides a new way to prepare modified asphalt with good high and low temperature performance with reducing construction costs.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"497 ","pages":"Article 143875"},"PeriodicalIF":8.0,"publicationDate":"2025-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218992","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":"Reliability of the laboratory cob specimens manufacturing: Variability of hygrothermal properties at the wall scale","authors":"Junior Tchiotsop ,&nbsp;Stéphanie Bonnet ,&nbsp;Nabil Issaadi ,&nbsp;Philippe Poullain","doi":"10.1016/j.conbuildmat.2025.143289","DOIUrl":"10.1016/j.conbuildmat.2025.143289","url":null,"abstract":"<div><div>This article investigates how cob specimens manufactured in a laboratory are representative of a real-scale cob wall. Emphasis is placed on hygrothermal properties, which are a significant asset for reducing energy costs of buildings. It is a continuation of a previous paper in which the natural variability of the manufactured cob samples was evaluated at the material scale (laboratory samples) (Tchiotsop et al., 2022). Indeed, numerous works propose various laboratory fabrication protocol parameters and approaches for the cob specimens. Hence, a 3.2 m<span><math><msup><mrow></mrow><mrow><mn>2</mn></mrow></msup></math></span> cob wall with 3% hemp shives content (by mass) was built, dried, and cored following a regular meshing plan. The variability of the wall specimens’ hygrothermal properties (density, thermal conductivity, volumetric heat capacity, moisture adsorption, moisture permeability, and intrinsic permeability) was measured and computed using the same protocols as in the previous article. As main results (details on the graphical abstract), the mean statistics of the dry bulk density and thermal properties showed good agreement between material and wall scales, while the variabilities were not always well represented at the material scale. For moisture transfer and storage properties, a significant gap was found in the statistics (up to 216%). Probability density functions (pdfs) of properties were assessed for both scales, and the same functions were found to be reliable. This study reveals the complexity at the real scale of cob buildings, making it difficult to obtain a representative specimen for characterization purposes.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"497 ","pages":"Article 143289"},"PeriodicalIF":8.0,"publicationDate":"2025-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145219232","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":"Investigating the carbonation kinetics of the ternesite-belite-rankinite multi-component carbonatable binder system: Optimizing performance for industrial products","authors":"Shiheng Li ,&nbsp;Xiaoyun Du ,&nbsp;Jun Chang","doi":"10.1016/j.conbuildmat.2025.143883","DOIUrl":"10.1016/j.conbuildmat.2025.143883","url":null,"abstract":"<div><div>Ternesite (C₅S₂$), reported as an ultra-low lime carbonatable binder, has demonstrated significant competitive advantages. This study prepared a novel carbonatable binder (NCB) mainly composed of ternesite, belite, and rankinite on a rotary cement kiln production line, aiming to investigate the influence of water-to-solid (w/s) ratio, CO₂ pressure, and carbonation duration on the compressive strength, carbonation kinetics, and phase evolution of NCB. The results indicated that an increase in the w/s ratio initially enhanced, but subsequently decreased, both the compressive strength and the degree of carbonation of NCB. Carbonation kinetics shifted from being controlled by the diffusion rate of Ca²⁺ to that of CO₂, with carbonation products evolving from polycrystalline calcium carbonate to predominantly calcite. As CO₂ pressure increased, the compressive strength initially increased before declining, although the degree of carbonation consistently increased. The influence of CO₂ diffusion rate control diminished, and the carbonation products shifted towards calcite as well. The optimal w/s ratio ranged from 0.15 to 0.2, with the CO₂ pressure should remain below 0.2 MPa. Among them, the w/s ratio exerted a more pronounced impact on the compressive strength and carbonation kinetics of NCB. Additionally, a w/s ratio exceeding 0.25 favored the carbonation of C₅S₂$, whereas increased CO₂ pressure proved advantageous for β-C₂S carbonation. This study provides theoretical support for the industrial production and carbonation curing process control of NCB products.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"497 ","pages":"Article 143883"},"PeriodicalIF":8.0,"publicationDate":"2025-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218991","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":"Effect of asphalt overlay on fatigue characteristics and fatigue life of in-service asphalt pavement mixtures","authors":"Chenyang Xue ,&nbsp;Chunhui Jiang ,&nbsp;Ruikang Yang ,&nbsp;Xiang Li ,&nbsp;Huailei Cheng ,&nbsp;Jianlong Ye ,&nbsp;Lulu Yang ,&nbsp;Lijun Sun ,&nbsp;Changxuan He","doi":"10.1016/j.conbuildmat.2025.143900","DOIUrl":"10.1016/j.conbuildmat.2025.143900","url":null,"abstract":"<div><div>Asphalt overlay technology has emerged as a key approach for repairing pavement distresses. Asphalt overlay is believed beneficial to enhance asphalt pavement’s fatigue resistance, as overlay increases the overall thickness of pavement and decreases the damaging effects of traffic loadings. However, limited research has compared the fatigue behaviors of asphalt mixtures cored from asphalt pavements with and without asphalt overlay, and the effect of asphalt overlay on asphalt mixture’s fatigue performance has yet been clearly determined. To address this gap, this paper aimed to investigate the effect of asphalt overlay on the fatigue characteristics of the in-service asphalt pavement. Firstly, asphalt mixture samples were cored from in-service asphalt pavements with and without asphalt overlay, and those samples were performed with indirect tensile fatigue tests to test their fatigue responses. Secondly, effects of asphalt overlay on fatigue-related indicators (i.e., stiffness modulus, phase angle, dissipated energy) of asphalt mixtures were analyzed. Finally, fatigue life models of asphalt mixtures from in-service asphalt pavements with and without asphalt overlay were developed, to assess the impacts of asphalt overlay on pavement fatigue resistance. The results demonstrate that asphalt overlay decreases the variation rate of asphalt pavement’s fatigue-related indicators with loading cycles, thus lowering fatigue damage accumulation of asphalt pavement. Moreover, the fatigue life model based on initial dissipated energy is suitable for various loading conditions and asphalt pavements with and without asphalt overlay. The findings of this research are expected to facilitate the assessment of fatigue behaviors of asphalt mixtures after overlay construction.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"497 ","pages":"Article 143900"},"PeriodicalIF":8.0,"publicationDate":"2025-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145218993","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}