Construction and Building Materials最新文献

{"title":"Predicting the fracture load of asphalt concrete under TPB test using POA-optimized machine learning methods","authors":"Huikun Ling ,&nbsp;Xinyu Wang ,&nbsp;Chuan Lv ,&nbsp;Zhong Sun ,&nbsp;Liangjun Liu ,&nbsp;Junjie Wang","doi":"10.1016/j.conbuildmat.2025.140580","DOIUrl":"10.1016/j.conbuildmat.2025.140580","url":null,"abstract":"<div><div>Fracture load <em>P</em>_<em>f</em> is a critical parameter for evaluating the fracture behavior of asphalt concrete (AC). However, traditional experimental methods for determining <em>P</em>_<em>f</em> are time-consuming and costly. Thus, this study employs machine learning (ML) to predict the <em>P</em>_<em>f</em> of AC under three-point bending (TPB) test based on aggregate gradation, specimen dimensions, porosity, and temperature. The Pelican Optimization Algorithm (POA) is utilized to optimize the hyperparameters of the Random Forest Regressor (RFR), Multi-Layer Perceptron (MLP), Generalized Additive Model (GAM), and LSBoost. Model performance is compared through error analysis, and the effective fracture resistance (<em>K</em>_eff) computed with the optimized models is evaluated against predictions by the traditional Maximum Tangential Stress (MTS) and Maximum Tangential Strain (MTSN) fracture criteria. The results suggest that conventional ML algorithms tend to exhibit lower predictive accuracy, weaker correlation, and signs of overfitting. By applying POA optimization, all four models show improvements in predictive accuracy, <em>R</em>² values, and a notable reduction in overfitting. Among the optimized models, LSBoost-POA demonstrates the highest predictive accuracy and robustness. Under Mixed-Mode I/II loading conditions, the <em>K</em>_eff predictive performance of RFR-POA and LSBoost-POA significantly outperforms that of MTS and MTSN, with LSBoost-POA achieving the best results. SHapley Additive exPlanations (SHAP) analysis reveals that for LSBoost-POA, the specimen size factor <em>λ</em> is the most influential parameter in <em>P</em>_<em>f</em> prediction, while the specimen height <em>H</em> has the least impact. These insights hold promising implications for applying machine learning to the study of fracture behavior in AC.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"470 ","pages":"Article 140580"},"PeriodicalIF":7.4,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143534947","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 study and finite element analysis on interfacial mechanical behaviors of steel-UHPC composite structures in acidic environments","authors":"Youzhu Lin ,&nbsp;Shuai Zhu ,&nbsp;Xinya Mao ,&nbsp;Ming Sun ,&nbsp;Jiachuan Yan","doi":"10.1016/j.conbuildmat.2025.140601","DOIUrl":"10.1016/j.conbuildmat.2025.140601","url":null,"abstract":"<div><div>Steel-concrete-steel (SCS) composite structures with ultra-high performance concrete (UHPC) are recognized for their durability and versatility, particularly in harsh environments such as acidic conditions. This study investigates the mechanical behavior at the steel-UHPC interface in SCS systems, focusing on the performance of studs as shear connectors under acidic exposure. Push-out tests were conducted to analyze mechanical performance and failure mechanisms at the interface. The results show that UHPC enhances mechanical performance by 65.4 %, improves ductility by 97.6 %, and significantly reduces crack propagation, offering greater resistance to acidic conditions compared to ordinary concrete. These findings highlight the critical role of UHPC in strengthening the interface and improving durability in aggressive environments. To extend the experimental findings, finite element (FE) analysis was used to develop theoretical models for interfacial shear capacity. A constitutive model integrating machine learning and elastoplastic damage mechanics was introduced to simulate the degradation of UHPC under acidic conditions with high accuracy. The FE model was validated using experimental data, providing detailed insights into the load transfer mechanisms at the interface. By combining experimental and theoretical approaches, this study develops a predictive model for interfacial shear capacity, offering practical guidance for designing durable and reliable SCS systems in demanding environments.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"470 ","pages":"Article 140601"},"PeriodicalIF":7.4,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143534948","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":"Synthesis of waste glass-derived silica nanoparticle and its role in anti-corrosion via a designed double-layered structure under chloride attack","authors":"Zuhua Xu ,&nbsp;Zhaoyang Sun ,&nbsp;Yuyang Zhao ,&nbsp;Zongjin Li ,&nbsp;Binmeng Chen","doi":"10.1016/j.conbuildmat.2025.140598","DOIUrl":"10.1016/j.conbuildmat.2025.140598","url":null,"abstract":"<div><div>Due to the ultralow chemical reactivity, direct use of waste glass (WG) in concrete leads to alkali-silica reaction (ASR) between silica and alkaline after hardening, causing volume expansion and internal cracks and limiting its use in reinforced concrete significantly. To tackle this issue, highly reactive nano silica was synthesized from waste glass. However, challenges, such as pH reduction and compromised chloride (Cl⁻) binding capacity, accelerated the corrosion of steel. In this study, we proposed waste glass-derived nano silica (WG-NS) modified cement paste with double-layered structure to mitigate the pH and Cl^- binding capacity issue. Results indicated that the synthesized waste glass-derived nano silica (WG-NS) was with ultrahigh purity of 98 %wt. SiO₂, specific surface area of approximately 400 m²/g, and high negative zeta potential of −31 mV. Notably, the R-Si (Inner layer: Unmodified cement paste &amp; Outer layer: WG-NS modified cement paste) double-layered structure exhibited the lowest Cl⁻ diffusion rate among the tested samples after Cl⁻ exposure. Consequently, the embedded steel showed the lowest corrosion rate of 0.25 µA/cm² and the highest charge transfer resistance (Rct) of 7.3 kΩ, remaining passivated after exposure. Additionally, only about 1 % of Fe₂O₃ (corrosion product) was found on the steel, which was the least.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"470 ","pages":"Article 140598"},"PeriodicalIF":7.4,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143551129","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":"Mechanical properties and constitutive models of rectilinear stirrup confined recycled brick-concrete aggregate concrete","authors":"Di Zhao ,&nbsp;Jianwei Zhang ,&nbsp;Haiyang Liang ,&nbsp;Yuping Sun","doi":"10.1016/j.conbuildmat.2025.140532","DOIUrl":"10.1016/j.conbuildmat.2025.140532","url":null,"abstract":"<div><div>Waste concrete and waste bricks accounted for a large proportion of the construction and demolition waste. Converting them into recycled construction materials has become a promising treatment solution, and the produced recycled coarse aggregate can be referred to as recycled brick-concrete aggregate (RBCA). This study dealt with the mechanical properties and stress-strain behavior of RBCA concrete through thirty-nine uniaxial compression tests. The experimental parameters encompassed the recycled brick aggregate (RBA) replacement ratio, concrete strength, and stirrup ratio. The results indicated that the RBCA concrete experienced similar compression failure process compared with recycled concrete aggregate concrete (RAC), but the brittleness was more pronounced in the post-peak stage, especially when the RBA replacement ratio exceeded 40 %. The RBCA concrete presented a decrease in elastic modulus and an increase in peak strain with the RBA replacement ratio. The stress-strain curves exhibited brittle characteristics as the concrete strength increased, while stirrup confinement could delay the peak strain and ultimate strain of RBCA concrete, and effectively improve the brittleness. However, as the RBA content exceeded 40 %, the improvement effect was relatively insignificant. The key parameters were modified by considering the influence of RBA, and a unified calculation formula for the stress-strain curves of unconfined and rectilinear stirrup confined RBCA concrete was proposed. The calculation results were in good agreement with the experimental results, which can provide data support for the constitutive research of RBCA concrete with a RBA replacement ratio in the range of 0 %-50 %.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"470 ","pages":"Article 140532"},"PeriodicalIF":7.4,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143534949","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":"Mechanistic insights into the impact of coal gangue on solid waste-based grouting fire extinguishing materials","authors":"Dedan Duan ,&nbsp;Huiping Song ,&nbsp;Tong Wang ,&nbsp;Wenjun Li ,&nbsp;Zhengjun Feng ,&nbsp;Wuyan Shen ,&nbsp;Haibin Wu","doi":"10.1016/j.conbuildmat.2025.140547","DOIUrl":"10.1016/j.conbuildmat.2025.140547","url":null,"abstract":"<div><div>The application of solid waste cementitious materials in grouting fire extinguishing has significant environmental sustainability advantages. This study systematically examined the effects of the combination of circulating fluidized bed fly ash, calcium carbide slag, flue gas desulphurized gypsum and coal gangue on the mechanical properties, hydration properties and fire extinguishing properties of grouting fire extinguishing materials. The compressive strength and density of added coal gangue were 4.6 MPa and 1.22 g/cm³. Consequently, under the combined effects of sedimentation and gelatinization, the rate of temperature decrease for the grouting fire extinguishing materials during the fire extinguishing process was 6.12 % higher than that of the system without coal gangue. The sulfur (S) content exhibited a 31.87 % enhancement in SO₂ absorption capacity, corresponding to an increase from 1.82 % to 2.4 % in sulfur concentration. Additionally, the system with coal gangue exhibited greater stability, reducing the mass loss rate of the high-temperature consolidated body by 10.84 %. After 25 freeze-thaw cycles, the mass loss rate of the grouting fire extinguishing materials was reduced by 1.96 %. At the same time, compared to traditional lime-based fire extinguishing materials, CO₂ emission of solid waste-based grouting extinguishing materials was reduced by 86.22 %, demonstrating significantly greater benefits in terms of substantial green, low-carbon, and energy-saving performance.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"470 ","pages":"Article 140547"},"PeriodicalIF":7.4,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143534953","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 effect of Al2O3 content on mechanical properties and interfacial wetting behavior of Y2O3 - Al2O3 composite crucibles","authors":"Qian Dang ,&nbsp;Wei Yu ,&nbsp;Chi Zhang ,&nbsp;Guo-Huai Liu ,&nbsp;Zhao-Dong Wang","doi":"10.1016/j.conbuildmat.2025.140606","DOIUrl":"10.1016/j.conbuildmat.2025.140606","url":null,"abstract":"<div><div>Y₂O₃ is a promising high-temperature refractory material for TiAl-based alloy melting and casting, but the high cost limits its widespread application. To address this, Y₂O₃ - Al₂O₃ composite ceramics with varying Al₂O₃ contents were designed and systematically characterized for the potential as cost-effective alternatives. The physical and mechanical properties of the composite ceramics, including flexural strength, porosity, surface roughness, and thermal shock resistance, were systematically investigated. Results showed that porosity, flexural strength and surface roughness increased with Al₂O₃ content, while thermal shock resistance peaked at 15 wt% Al₂O₃. The high-temperature wettability and interaction mechanism between the molten TiAl-based alloy and the Y₂O₃ - Al₂O₃ composite ceramic at 1873 K were investigated by the sessile drop wetting experiment and the in-situ observation technique of high-temperature laser scanning confocal microscopy (HTLSCM). The non-linear fitting results suggest that the equilibrium contact angle follows a cubic polynomial distribution pattern with respect to Al₂O₃ content, and the equilibrium contact angle decreased from 82.6° to 38.5° when the Al₂O₃ content was increased from 0 wt% to 45 wt%. Observation of the interface layer showed that the alloy melt reacted chemically with the composite ceramic, forming YAM and TiO₂ reaction layers. Analysis of the wetting kinetics indicated that the formation of these reaction products is the main driving factor for the movement of the three-phase lines at the interface. Compared with the pure Y₂O₃ crucible with high chemical stability and limited thermal shock resistance, the composite ceramic with 15 wt% Al₂O₃ not only exhibits similar wetting properties as the pure Y₂O₃ crucible while significantly enhancing thermal shock resistance, thereby greatly extending service life and improving stability in the casting process. This offers an ideal approach to addressing the challenges of low-cost smelting and casting of TiAl alloys.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"470 ","pages":"Article 140606"},"PeriodicalIF":7.4,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143528741","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":"Shear behavior of the horizontal joint with tooth groove connection and large-diameter steel bar grout lapping in reserved hole","authors":"Qi Chen ,&nbsp;Xiaoyong Luo ,&nbsp;Xutong Zheng ,&nbsp;Chao Deng","doi":"10.1016/j.conbuildmat.2025.140593","DOIUrl":"10.1016/j.conbuildmat.2025.140593","url":null,"abstract":"<div><div>The horizontal joint not only affects the industrial production and assembly efficiency of precast components, but also plays an important role in the mechanical properties and seismic performance of prefabricated structures. In this paper, an innovative horizontal joint with tooth groove connection and large-diameter steel bar grout lapping in reserved hole was proposed, and the failure mode, load-displacement curve, relative slip, steel bar strain and shear behavior were explored based on the monotonic horizontal load tests of one cast-in-place specimen and five prefabricated specimens. On this basis, a finite element model was established and verified, and the effects of axial compression ratio, connection strength, lap length and arrangement of reserved hole were analyzed. The results indicated that the overall failure mode was the shear slip failure of the horizontal joint, and the connecting steel bar and self-compacting concrete in reserved hole can effectively transfer the stress. With the increase of axial compression ratio, the shear behavior was enhanced significantly. And the connection strength showed a certain strengthening effect on the shear behavior in the case of a constant axial compression ratio. As the lap length increased, the shear capacity increased gradually, but it had no obvious effect on the strain of the connecting steel bar. Moreover, the effect of the diameter and spacing of reserved holes was limited and almost negligible. On this basis, the design suggestions of horizontal joint with tooth groove connection and large-diameter steel bar grout lapping in reserved hole were given.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"470 ","pages":"Article 140593"},"PeriodicalIF":7.4,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143534942","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":"Comprehensive analysis of inhomogeneous carbonation and phase distribution in pour-molded steel slag/cement pastes","authors":"Lingxu Chen ,&nbsp;Mingyu Zhao ,&nbsp;Dan Wang ,&nbsp;Qixiang Tang ,&nbsp;Xiaopeng Shang ,&nbsp;Yanfeng Fang","doi":"10.1016/j.conbuildmat.2025.140603","DOIUrl":"10.1016/j.conbuildmat.2025.140603","url":null,"abstract":"<div><div>Steel slag, a byproduct rich in calcium and magnesium, holds significant potential for CO₂ sequestration and utilization in building materials. This study involves the preparation of steel slag/cement paste using pour molding, followed by carbonation under 0.2 MPa gas pressure for CO₂ curing. It investigates the effects of varying carbonation durations on carbonation depth, CO₂ uptake, and compressive strength of the resulting steel slag/cement composites. The findings demonstrate that both CO₂ uptake and compressive strength increase with extended carbonation times, achieving a maximum CO₂ uptake of 5.1 % and a compressive strength of 63.38 MPa after 12 h of carbonation. Carbonation depth reached approximately 4 cm after 12 h for 20 × 20 × 60 mm³ specimen (unidirectional carbonation). The samples were sectioned at 1 cm intervals along the vertical axis, labeled C1–C5, and significant variations were observed in CO₂ uptake, carbonation degree, pore structure, polymerization degree, and microhardness values across different depths. Specifically, the carbonation degree ranged from 24.3 % to 7.1 % between specimens C1 and C5. Carbonation significantly reduced porosity and enhanced pore structure, with the extent of reduction inversely related to carbonation depth. Calcite was identified as the primary carbonation product, with its formation becoming denser at higher carbonation levels. Furthermore, the unreacted calcium silicate phase was encapsulated by CaCO₃, and an outer silica-rich layer formed a protective shell, inhibiting further CaCO₃ formation.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"470 ","pages":"Article 140603"},"PeriodicalIF":7.4,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143535033","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 frost resistance and deterioration law of manufactured sand coal gangue concrete","authors":"Jisheng Qiu ,&nbsp;Yufeng Liu ,&nbsp;Leilei Li ,&nbsp;Tiantian Lei ,&nbsp;Tianyi Zhang ,&nbsp;Zhiqi Zhang ,&nbsp;Jichu Bai","doi":"10.1016/j.conbuildmat.2025.140544","DOIUrl":"10.1016/j.conbuildmat.2025.140544","url":null,"abstract":"<div><div>Coal gangue is one of the largest industrial solid wastes produced and discharged in China. The coal gangue manufactured sand made by crushing and screening can not only alleviate the shortage of natural sand resources, but also reduce the environmental pollution caused by gangue discharge. In view of the characteristics that coal mines in China are mainly distributed in cold areas, this study configured manufactured sand coal gangue concrete with different coal gangue manufactured sand replacement rates (0 %, 20 %, 40 %, 60 %, 80 %, 100 %). The mechanical properties of structures and the deterioration mechanism under freeze-thaw cycles were analyzed by macro and micro test methods. The results show that with the increase of coal gangue manufactured sand replacement rate, the mechanical properties and frost resistance of structures decrease. When coal gangue manufactured sand replacement rate is 100 %, the compressive strength, splitting tensile strength, flexural strength decrease by 18.1 %, 22.4 % and 28.7 %, respectively, and the frost resistance is the worst. When the coal gangue manufactured sand content is less than 40 %, the mechanical properties of structures are superior, and the damage degree before and after F-T is small. Compared with the unreplaced, the proportion of the harmful pores decreased by 3.9 % and 3.3 % respectively when the coal gangue manufactured sand replacement rate was 20 % and 40 %, and the proportion of the harmless pores increased by 10.4 % and 2.8 %. At this moment, the secondary hydration of coal gangue manufactured sand and coal gangue optimizes the aggregate gradation and pore structure, enhances the interfacial transition zone, and improves the frost resistance of structures. The damage of structures is due to the initial defects of interfacial transition zone, and the frost heaving stress further leads to the deterioration of interfacial transition zone structure and the stripping of aggregate-mortar, resulting in the degradation of macro performance. Finally, the structures damage evolution equation under different coal gangue manufactured sand replacement rates was established by the two-parameter Weibull probability distribution model. This study provides reference and guidance for the popularization and application of manufactured sand coal gangue concrete in cold areas.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"470 ","pages":"Article 140544"},"PeriodicalIF":7.4,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143535032","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":"Eco-friendly bismuth vanadate/iron oxide yellow composite heat-reflective coating for sustainable pavement: Urban heat island mitigation","authors":"Yujing Chen ,&nbsp;Aimin Sha ,&nbsp;Wei Jiang ,&nbsp;Qun Lu ,&nbsp;Peidong Du ,&nbsp;Kui Hu ,&nbsp;Chao Li","doi":"10.1016/j.conbuildmat.2025.140645","DOIUrl":"10.1016/j.conbuildmat.2025.140645","url":null,"abstract":"<div><div>To prevent high-temperature deterioration of asphalt pavement in summer and mitigate urban heat island effect, an eco-friendly bismuth vanadate/iron oxide yellow composite heat-reflective coating was developed. The coating formulation was systematically optimized guided by multi-aspect characterization, including reflectance measurements, color evaluation, thermal performance analysis, microscopic morphology and elemental analysis. The optimized coating was then subjected to comprehensive performance assessment, focusing on cooling effectiveness, thermal cycling resistance, and thermal decomposition behavior. The results showed that the optimal composite pigment (75 wt% bismuth vanadate) achieved balanced spectral properties with 46.54 % visible reflectance and 73.78 % near-infrared reflectance. The optimized coating formulation (9 wt% pigment content) demonstrated comprehensive performance advantages including controlled visible reflectance (53.26 %) and appropriate brightness (L* = 81.55) for glare mitigation, while maintaining high near-infrared reflectance (76.85 %) for solar heat reflection. Field testing revealed significant cooling effectiveness with a 15.20°C reduction in peak surface temperature compared to uncoated asphalt pavement. The coating exhibited excellent durability under thermal cycling conditions (-20°C to 60°C) and maintained thermal stability below 300°C. This study provides a viable solution for sustainable urban pavement applications that effectively reduce pavement temperature for urban heat island effect mitigation while ensuring traffic safety by preventing excessive surface glare.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"470 ","pages":"Article 140645"},"PeriodicalIF":7.4,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143535037","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}