Construction and Building Materials最新文献

{"title":"Numerical and in-situ investigation on bilateral double-wall barriers in mitigating metro train-induced vibrations","authors":"Weili Luo,&nbsp;Shibang Deng","doi":"10.1016/j.conbuildmat.2025.140502","DOIUrl":"10.1016/j.conbuildmat.2025.140502","url":null,"abstract":"<div><div>In the case of metro tunnels crossing through the area with buildings on both sides in a densely populated mega city, it is necessary to apply a countermeasure to mitigate metro train-induced vibrations on both sides. To achieve this goal, a vibration mitigation measure concept of bilateral double-wall barriers (BDWB) is proposed, in which a wall-soil-wall composite as a double-wall barrier is set in the propagation path from the tunnels to the buildings at one side of the tunnels and, typically, is symmetrically installed at the other side. The performance of the BDWB in a homogeneous halfspace is examined using a 2.5D finite element methodology. The wall-soil-wall composite is idealized as a Timoshenko beam model and its bending dispersion curve is analytically obtained by a simplified method. The physical mechanism of the BDWB is interpreted, indicating the dominance of the bending mode of the wall-soil-wall composite and the influence of a phase shift caused by the compressive wave velocity difference in the BDWB. A series of full-scale in-situ tests are conducted to investigate the isolation performance of the BDWB, followed by a comparison with the corresponding numerical analysis. The results show that a BDWB of 24.5 m depth in the test site can effectively reduce the vibrations behind the BDWB with a maximum average insertion loss of up to 24.3 dB. Results from the in-situ test and the numerical analysis confirm the potential of the BDWB in isolating metro train-induced vibrations.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"469 ","pages":"Article 140502"},"PeriodicalIF":7.4,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143479933","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":"Meso-damage mechanism of sintered sludge cementitious composites under uniaxial compression: Experimental characterization and theoretical modeling","authors":"Jinrui Zhang ,&nbsp;Zhuofan Wu ,&nbsp;Youzhi Yang ,&nbsp;Ziye Kang ,&nbsp;Dongshuai Hou ,&nbsp;Biqin Dong","doi":"10.1016/j.conbuildmat.2025.140490","DOIUrl":"10.1016/j.conbuildmat.2025.140490","url":null,"abstract":"<div><div>Considering the performance and environmental potential of sintered sludge cementitious composite (SSCC), this research comprehensively evaluated the meso-damage mechanism of SSCC under uniaxial compression through experimental characterization and theoretical modeling. Specifically, advanced techniques such as acoustic emission (AE), digital image correlation (DIC), low-field nuclear magnetic resonance (LFNMR), and scanning electron microscopy (SEM) were employed to deeply characterize the damage responses, meso-structures and damage morphology. Theoretical modeling based on the classical damage theory (CDT) framework established a stochastic damage constitutive (SDC) model to elucidate the intrinsic relationship between meso-damage mechanism and macro-performance. Results demonstrated that the stress-strain behavior, energy response, and macro-cracks evolution of SSCC, showing distinctly different behaviors before and after the peak point on the constitutive curves, were accurately predicted by SDC model. LFNMR and SEM confirmed that macro-damage originated from interfacial transition zone (ITZ) fracture. Furthermore, SDC model verified that 5 % SSA effectively enhanced the elasticity and ductility of meso-structure, thereby significantly improving the macro-performance and damage resistance.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"469 ","pages":"Article 140490"},"PeriodicalIF":7.4,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143480041","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":"Acoustic emission-based analysis of mechanical behavior and damage evolution in corroded RC square columns","authors":"Tanbo Pan ,&nbsp;Zhengxie Zhang ,&nbsp;Yonglai Zheng ,&nbsp;Kai Wang","doi":"10.1016/j.conbuildmat.2025.140458","DOIUrl":"10.1016/j.conbuildmat.2025.140458","url":null,"abstract":"<div><div>This study investigates the impact of corrosion on the mechanical behavior, failure processes, and acoustic emission (AE) characteristics of reinforced concrete (RC) columns under uniaxial compression. The results reveal a transition in failure modes from ductile axial compression in uncorroded specimens to brittle shear-compression failure in severely corroded specimens, driven by weakened reinforcement-concrete bonds and reduced stirrup confinement. Corrosion-induced damage significantly reduces stiffness, ductility, and ultimate load-bearing capacity, compromising structural resilience. AE monitoring highlights a three-stage damage evolution—initial damage, damage propagation, and damage failure—with accelerated microcrack initiation and macrocrack coalescence in corroded specimens. The AE frequency distribution shifts from mid-frequency dominance in uncorroded specimens to low-frequency dominance in heavily corroded specimens, reflecting premature macro-damage and structural instability. Additionally, metrics such as AE cumulative signal strength, historical index (<span><math><mi>HI</mi></math></span>), and severity value (<span><math><msub><mrow><mi>S</mi></mrow><mrow><mi>r</mi></mrow></msub></math></span>) reveal earlier and more concentrated energy release in severely corroded specimens, underscoring the accelerated degradation and brittle failure mechanisms induced by corrosion. Besides, Through Gaussian Mixture Modeling (GMM) analysis of acoustic emission (AE) parameters, a transition from tensile-dominated cracking in uncorroded specimens to shear-dominated failure in severely corroded specimens was observed. These findings demonstrate the utility of AE technology in characterizing corrosion-induced damage and provide critical insights for real-time structural health monitoring and failure prediction.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"469 ","pages":"Article 140458"},"PeriodicalIF":7.4,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143480042","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":"Investigation on physical, rheological properties and VOCs emission of asphalt modified with hydrocarbon-based graphene","authors":"Yansong Fan ,&nbsp;Meizhu Chen ,&nbsp;Xiaoyu Yang ,&nbsp;Jianwei Zhang ,&nbsp;Jun He ,&nbsp;Muyan Han","doi":"10.1016/j.conbuildmat.2025.140474","DOIUrl":"10.1016/j.conbuildmat.2025.140474","url":null,"abstract":"<div><div>Hydrocarbon-based graphene (HG), derived from petrochemical by-products, can be economically produced in large-scale quantities needed for asphalt pavement application requirements. With the intention of exploring the application feasibility of HG in asphalt materials, the properties of HG were elucidated firstly. Basic properties and storage stability of hydrocarbon-based graphene modified asphalt (HGMA) were evaluated while its rheological behaviors and functional group were characterized. In addition, the concentrations of volatile organic compounds (VOCs) in HGMA containing different dosages of HG were assessed. The experimental results indicate that HG possesses a lamellar and pore structure, which is conducive to fusion with asphalt molecules and adsorption capacity. HGMA is harder and expresses weaker sensitivity to temperature than petroleum asphalt. The dispersion of HG in asphalt is uniform when the dosage does not exceed 1.5 % by mass of petroleum asphalt. Incorporation of HG improves the elastic recovery and anti-rutting abilities of asphalt while fatigue resistance is weakened and embrittlement is prone to occurrence. Modification of HG on asphalt belongs to a physical process. The inhibition effect of HG on VOCs emission of asphalt is positively correlates with its dosage, and the maximum concentration and stable concentration of VOCs are reduced by 58 % and 60 % respectively when the dosage of HG reaches 1.5 %. The experimental results provide a foundation for future application and development of HG in asphalt materials.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"469 ","pages":"Article 140474"},"PeriodicalIF":7.4,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143480037","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 novel method and mechanism for enhancing frost resistance in cement using hydrogel","authors":"Zhaoqiang Lu ,&nbsp;Shuguang Liu ,&nbsp;Dandan Yin ,&nbsp;Liqiang Yin ,&nbsp;Changwang Yan ,&nbsp;Xiaoxiao Wang ,&nbsp;Shihui Liu ,&nbsp;Lin Li","doi":"10.1016/j.conbuildmat.2025.140482","DOIUrl":"10.1016/j.conbuildmat.2025.140482","url":null,"abstract":"<div><div>The freeze-thaw durability of cementitious materials is a critical issue for long-term infrastructure performance. This paper proposes a novel approach that transitions from traditional passive methods of improving frost resistance to an active method. It fundamentally inhibits the freezing of pore water and reduces or eliminates frost heave forces. Hydrogels were prepared using a physical freeze-thaw method and its formation mechanism, microstructure, and mechanical properties were thoroughly analyzed. The hydrogels were then broken into particles and incorporated into cement to create enhanced cementitious materials. The frost resistance of these composites was evaluated to elucidate the mechanism by which the hydrogels improve frost resistance. Results indicated that the addition of hydrogels did not lead to the formation of new hydration products but promoted cement hydration by maintaining more unfrozen water. The amount of ice formation and the freezing rate in hydrogel cement composites were significantly lower than in pure cement paste. This effectively inhibited freeze-thaw damage and substantially improved frost resistance. Specifically, the mass loss rate of cement paste reached 7.19 % after only 125 freeze-thaw cycles, exceeding the freeze-thaw damage threshold. In contrast, hydrogel-enhanced cementitious materials demonstrated a mass loss rate of just 0.15 % after 250 freeze-thaw cycles. They also exhibited a compressive strength reduction of only about 10 %, maintaining nearly 50 MPa. Additionally, the flexural strength test for cement paste prism specimens could not be performed after 150 freeze-thaw cycles due to severe damage. In contrast, the flexural strength of hydrogel cement composites decreased by only 3.50 % at minimum. These results highlight the potential of hydrogel-modified cementitious materials for creating more resilient infrastructure that can withstand harsh freeze-thaw conditions. This advancement contributes to more sustainable construction practices.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"469 ","pages":"Article 140482"},"PeriodicalIF":7.4,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143480043","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":"An efficient comprehensive recycling process of overhaul slag via alkali roasting and two-stage leaching","authors":"Liangmin Dong ,&nbsp;Fen Jiao ,&nbsp;Wei Liu ,&nbsp;Chen Li","doi":"10.1016/j.conbuildmat.2025.140537","DOIUrl":"10.1016/j.conbuildmat.2025.140537","url":null,"abstract":"<div><div>Overhaul slag as a hazardous solid waste generated in the aluminum electrolysis industry, contains abundant valuable substances while posing severe threats to the ecological environment. Green and scientific high-value recycling of overhaul slag can effectively prevent environmental pollution and mitigate the crisis of global resource shortage. In this paper, an alkali roasting and two-stage leaching process is proposed to purify graphite and re-prepare cryolite efficiently and environmentally friendly. Firstly, NaOH roasting converts insoluble fluorine and aluminum compounds into soluble NaF and NaAlO₂ phases, respectively. These phases are selectively extracted into the solution via water leaching. Under optimal conditions, the leaching rates of fluorine and aluminum reached 99.5 % and 98.4 %, respectively. The residue is then subjected to acid leaching to further purify the graphite purity from 86.2 % to 98.6 %. Finally, the aqueous leaching solution and acid leaching solution are mixed to recover fluorine and aluminum in the form of cryolite. The whole process is low-cost, pollution-free, and achieves harmless treatment and full-component recycling of overhaul slag, providing a green channel for the high-value utilization of hazardous wastes in the aluminum smelting process.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"469 ","pages":"Article 140537"},"PeriodicalIF":7.4,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143479930","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":"Durability study of CRTS III slab ballastless track under the combined effects of fatigue damage and carbonation","authors":"Li Song ,&nbsp;Libing Chen ,&nbsp;Maodong Zhu ,&nbsp;Lian Wang ,&nbsp;Jian Hou","doi":"10.1016/j.conbuildmat.2025.140454","DOIUrl":"10.1016/j.conbuildmat.2025.140454","url":null,"abstract":"<div><div>To investigate the durability issues of CRTS III slab ballastless track concrete under the combined effects of fatigue damage and carbonation, this study develops a carbonation model for concrete and a reinforcement corrosion rate model, based on porous media theory and material transport principles, combined with experimental analyses. Numerical simulations were performed, and the results were compared with experimental data to validate the models' accuracy. The study also explores the influence of various parameters on CO₂ transport and internal reinforcement corrosion within the CRTS III slab ballastless track. The results indicate that, under fixed damage levels and carbonation durations, the carbonation depth of the self-compacting concrete layer is positively correlated with CO₂ concentration and temperature but negatively correlated with relative humidity. The average corrosion rate of the reinforcing steel anode is approximately proportional to the anode-to-cathode surface area ratio. As saturation varies, significant changes are observed in the corrosion potential at the cathode surface, whereas the anode surface shows relatively smaller changes. Additionally, the corrosion of the outermost longitudinal reinforcing steel in the self-compacting layer intensifies with increasing temperature. This model elucidates the mechanisms of CO₂ diffusion and reinforcing steel corrosion in ballastless track concrete under the combined effects of fatigue and carbonation. It provides a theoretical basis for durability analysis and assessment of CRTS III slab ballastless track systems.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"469 ","pages":"Article 140454"},"PeriodicalIF":7.4,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143480038","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":"Compressive fatigue resistance and damage evolution model of foamed polyurethane grouting materials under different loading characteristics and densities","authors":"Wang Pan ,&nbsp;Yongbo Wang ,&nbsp;Weiliang Gao ,&nbsp;Chao Zhang ,&nbsp;Cuixia Wang ,&nbsp;Hongyuan Fang ,&nbsp;Pengjia Zhu ,&nbsp;Fuming Wang","doi":"10.1016/j.conbuildmat.2025.140514","DOIUrl":"10.1016/j.conbuildmat.2025.140514","url":null,"abstract":"<div><div>Foamed polyurethane grouting materials are susceptible to progressive fatigue damage under traffic loads after rehabilitation for highways and railways. This work systematically investigated compressive fatigue performance, focusing on density, stress level, and loading frequency. Additionally, a fatigue damage evolution model was developed. The test results revealed lower loading frequencies, stress levels, and densities led to higher fatigue life. Stress level and loading frequency had minimal impact on the initial dynamic stiffness, which increased following a power-law relationship with increasing density. In addition, the initial dynamic stiffness was approximately 1.58 times that of the quasi-static stiffness. Adjustment, stable change, and failure stages characterized stiffness damage evolution curves. Stress level and loading frequency had a limited impact on stiffness damage evolution compared to density. At failure, stiffness damage exceeded 0.3. The proposed compressive fatigue damage evolution model, incorporating density and loading characteristics, demonstrated strong agreement with test results, with mean constitutive curve errors below 6.61 %. This work provides a theoretical basis and scientific guidance for further numerical analyses and engineering applications.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"469 ","pages":"Article 140514"},"PeriodicalIF":7.4,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143479929","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":"Viscoelasticity stage evolution characteristics and multiphase microstructure of aged crumb rubber-modified asphalt","authors":"Ruipu Chen ,&nbsp;Long Chen ,&nbsp;Peng Hu ,&nbsp;Hongzhou Zhu ,&nbsp;Li Ou","doi":"10.1016/j.conbuildmat.2025.140531","DOIUrl":"10.1016/j.conbuildmat.2025.140531","url":null,"abstract":"<div><div>Owing to the complex composition of the internal structures of aged crumb rubber-modified asphalt (CRMA), the current understanding of its aging properties and mechanism is lacking. Therefore, this study used the Christensen–Anderson–Marasteanu model, established the master curves of the complex moduli and phase angles of aged CRMA samples, and analyzed the evolution of their viscoelastic properties. Moreover, gel permeation chromatography and scanning electron microscopy were used to characterize the microscopic characteristics of the asphalt and crumb rubber modifier (CRM) phases of the CRMA samples. In aging, the evolution process of the complex modulus and phase angles of CRMAs demonstrated three stages in the low-frequency domain. With the degradation of the CRM, the plateau in the master curves of the phase angles gradually disappeared and the slopes of the Han curves gradually increased. The plateau of phase angle and slope of the Han curve were used as indices to evaluate the degradation of the CRM in the aged CRMA. The microscopic tests demonstrated that the further degradation effect of the CRM degradation products decreased the weight-average molecular weight of the aged CRMA. In addition, the degradation of the CRM probably affected the formation of asphaltene and reduced its content. The CRM of the unaged CRMA exhibited a fluffy structure similar to that of a sponge. As the aging time increased, the surface of the CRM tended to be smooth, the pore structure disappeared, and finally, the fluffy structural form of the CRM disappeared.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"469 ","pages":"Article 140531"},"PeriodicalIF":7.4,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143480039","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":"Temperature and contact states of hot-recycled asphalt mixing at a non-thermal equilibrium condition based on discrete element method","authors":"Jiangyu Liu ,&nbsp;Quan Liu ,&nbsp;Long Yin ,&nbsp;Jiantao Wu","doi":"10.1016/j.conbuildmat.2025.140526","DOIUrl":"10.1016/j.conbuildmat.2025.140526","url":null,"abstract":"<div><div>The mixing of hot recycled asphalt mixture (HRAM) plays a critical role in its performance, particularly in non-uniform temperature environments and high RAP content scenarios. Therefore, it is imperative to investigate the mixing process of HRAM to achieve high-quality production of HRAMs. In this study, the DEM method was employed to simulate the mixing process of HRAMs with predetermined RAP temperatures of 353 K, 373 K, and 393 K, and varying RAP contents at 20 %, 40 %, and 60 %. Statistical analysis of temperature distribution was conducted. Additionally, for representation of particle contact state, contact number statistics and coordination number indicators were introduced. The study revealed that with increasing mixing time, the temperature distribution of asphalt mixture particles gradually concentrated and the average temperature decreased. In all cases examined in this study, a turning point in the temperature field distribution was observed at approximately 50 seconds. Complete thermal equilibrium was not found in a limited mixing time of 90 seconds. The interaction between particles underwent significant changes during the initial stages of mixing and stabilized in the final state, which was influenced by both the RAP content and predetermined RAP temperatures. The ANN (Average Nearest Neighbour Analysis) index introduced can serve as a crucial indicator to characterize the mixing of hot-recycled asphalt mixtures.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"469 ","pages":"Article 140526"},"PeriodicalIF":7.4,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143474809","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}