Construction and Building Materials最新文献_第7页

Role of asphalt binder film thickness on the behaviour of RAP-incorporated concrete

IF 7.4 1区工程技术

Construction and Building Materials Pub Date : 2025-03-30 DOI: 10.1016/j.conbuildmat.2025.141012

Bibhuti Bhushan Bhardwaj , Surender Singh , C.R. Sumukh Swaroop

{"title":"Role of asphalt binder film thickness on the behaviour of RAP-incorporated concrete","authors":"Bibhuti Bhushan Bhardwaj , Surender Singh , C.R. Sumukh Swaroop","doi":"10.1016/j.conbuildmat.2025.141012","DOIUrl":"10.1016/j.conbuildmat.2025.141012","url":null,"abstract":"<div><div>This study investigates the role of asphalt binder film thickness around the Reclaimed Asphalt Pavement (RAP) aggregates in influencing concrete behaviour. For fundamental understanding, the RAP aggregates were prepared in the laboratory at different asphalt binder (AB) dosages simulating the field oxidation. These aggregates were then characterised for their physical & morphological properties, hydrophobicity, and leaching behaviour, and later related to concrete's fresh, mechanical, and durability characteristics. The results indicated that the performance of concrete is strongly governed by the asphalt coating on RAP and the concrete behaves differently as a function of AB content — with different AB contents (0–3 %), the reduction in concrete compressive strength, flexural strength, and elastic modulus were found to be in the range of 29–58 %, 21–54 %, and 25–71 %, respectively. At dosage ≤ 2 %, AB sealed the micro-pores on aggregate surfaces, softened the edges and corners, reduced the surface roughness, and eventually enhanced the concrete workability by 43 %. However, excess binder beyond 2 %, caused the RAP to agglomerate, leading to an increase in the aggregate’s angularity and a decrease in its overall sphericity, subsequently reducing the concrete consistency. In addition, the excess binder reduced the asphalt cohesive strength which in turn negatively impacted the concrete performance. The leachate (organic compound) concentration was also observed to be a function of the AB content which interfered with the hydration kinetics of cement paste leading to the formation of 69–207 % thicker interfacial transition zone. Conversely, increasing the AB to 3 % significantly enhanced the concrete toughness index by 136 %.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"473 ","pages":"Article 141012"},"PeriodicalIF":7.4,"publicationDate":"2025-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143734673","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}

引用次数: 0

Maximizing the utilization of construction waste in cement-stabilized macadam based on mechanics and durability performance

IF 7.4 1区工程技术

Construction and Building Materials Pub Date : 2025-03-30 DOI: 10.1016/j.conbuildmat.2025.141089

Yong Yi , Yingjun Jiang , Ouyang Lou , Yu Zhang , Tian Tian , Jiangtao Fan , Yun Chen

{"title":"Maximizing the utilization of construction waste in cement-stabilized macadam based on mechanics and durability performance","authors":"Yong Yi , Yingjun Jiang , Ouyang Lou , Yu Zhang , Tian Tian , Jiangtao Fan , Yun Chen","doi":"10.1016/j.conbuildmat.2025.141089","DOIUrl":"10.1016/j.conbuildmat.2025.141089","url":null,"abstract":"<div><div>The substantial accumulation of construction and demolition waste (CDW) adversely affects both the economy and the environment, making its recycling a crucial strategy to mitigate this issue. To elucidate the application effectiveness of CDW in cement-stabilized macadam (CSM), particularly concerning durability, this study analyzes the impact of recycled aggregate content on the physical and mechanical properties of cement-stabilized macadam. It proposes acceptable maximum recycled aggregate content and composition that do not result in a significant decline in mechanical properties. The mechanical, durability, and fatigue characteristics of cement-stabilized macadam with recycled aggregates (CACSM) were evaluated. Utilizing a genetic algorithm combined with a backpropagation (BP) neural network (GA-BP), the durability performance of CACSM was predicted. The findings indicate that the recycled fine aggregate content can reach up to 58 %, while the recycled coarse aggregate content can reach up to 25 %, without compromising the mechanical strength of CACSM compared to traditional CSM. Furthermore, when the recycled fine aggregate content is less than 45 %, the durability and fatigue performance of CACSM surpass those of CSM. The GA-BP model demonstrated a strong fitting performance for predicting the durability of CACSM.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"473 ","pages":"Article 141089"},"PeriodicalIF":7.4,"publicationDate":"2025-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143734792","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}

引用次数: 0

Development of heat-resistant tunnel muck-based shotcrete for geothermal environments: Dual drive of combining explainable machine learning and microstructure characterization

IF 7.4 1区工程技术

Construction and Building Materials Pub Date : 2025-03-30 DOI: 10.1016/j.conbuildmat.2025.140994

Yang Li , Yujie Liu , Yanchun Miao , Zhiyong Liu , Jinyang Jiang , Junlin Lin

{"title":"Development of heat-resistant tunnel muck-based shotcrete for geothermal environments: Dual drive of combining explainable machine learning and microstructure characterization","authors":"Yang Li , Yujie Liu , Yanchun Miao , Zhiyong Liu , Jinyang Jiang , Junlin Lin","doi":"10.1016/j.conbuildmat.2025.140994","DOIUrl":"10.1016/j.conbuildmat.2025.140994","url":null,"abstract":"<div><div>The in-situ material shortage and high geothermal service conditions significantly hinder the utilization of shotcrete for the construction of tunnels in plateau regions. In this study, fully tunnel muck-based shotcrete (FTMS) was developed using stone powder and sand-gravel aggregates derived from tunnel muck. The effects of stone powder content, stone powder modification methods, and six performance-reinforcing materials on the high-geothermal resistance of FTMS were systematically investigated. The results demonstrated that a stone powder content of 20 % and a modification ratio of stone powder:silica fume:modifier = 82:15:3 achieved an optimal balance between stone powder utilization and high-geothermal performance. The improvement effect of calcium carbonate whiskers on the compressive strength of FTMS under high geothermal conditions was most significant, while the optimization effect of nano alumina sol on compressive strength and mass loss rate was most prominent. The influence of dual-doped performance-reinforcing materials on three properties was predicted using artificial neural networks, and interpretability analysis was conducted using SHAP. Finally, the optimal combination strategy was determined to be the co-doping of nano alumina sol and calcium carbonate whiskers. Microstructural analysis revealed that the addition of nanomaterials forms a dense calcium carbonate network in FTMS, while promoting the secondary hydration of calcium hydroxide, resulting in high-strength hydration products such as monocarboaluminate and ettringite. Additionally, a significant transformation of C-S-H to C-A-S-H phases was observed, accompanied by a 36.6 % reduction in harmful pores.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"473 ","pages":"Article 140994"},"PeriodicalIF":7.4,"publicationDate":"2025-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143734727","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}

引用次数: 0

Effect of Chitosan and Casein on the CBR behavior of silty clay for low volume roads: Reliability-based design optimization approach

IF 7.4 1区工程技术

Construction and Building Materials Pub Date : 2025-03-29 DOI: 10.1016/j.conbuildmat.2025.141014

Romana Mariyam Rasheed , Arif Ali Baig Moghal , B. Munwar Basha , Abdullah Almajed

{"title":"Effect of Chitosan and Casein on the CBR behavior of silty clay for low volume roads: Reliability-based design optimization approach","authors":"Romana Mariyam Rasheed , Arif Ali Baig Moghal , B. Munwar Basha , Abdullah Almajed","doi":"10.1016/j.conbuildmat.2025.141014","DOIUrl":"10.1016/j.conbuildmat.2025.141014","url":null,"abstract":"<div><div>The unsoaked and soaked California Bearing Ratio (CBR) values play a pivotal role in understanding the suitability of the selected subgrade soil. Two hydrophobic biopolymers, Chitosan and Casein were adopted in the current study to improve Silty Clay at dosages (dosage of Chitosan (<em>D</em><sub><em>ch</em></sub>) and Casein (<em>D</em><sub><em>ca</em></sub>)) of 0.5 %, 1 %, 2 %, and 4 % after curing for 7, 14, 28, and 60 days. The unsoaked bearing resistance increased with an increase in dosage and curing period for both biopolymers. However, the soaked CBR values declined at <em>D</em><sub><em>ch</em></sub> and <em>D</em><sub><em>ca</em></sub> of 4 % due to the formation of interaggregate voids. The probability of the subgrade failure against the minimum soaked CBR requirement for low-volume roads was evaluated to assess the suitability of biopolymer-treated soils. The 28-day cured Chitosan and Casein samples attained a target reliability index of 3 at dosages of <em>D</em><sub><em>ch</em></sub> = 0.7 % and <em>D</em><sub><em>ca</em></sub> = 1.25 %, respectively for <em>COV of CBR</em><sub><em>min</em></sub> = 20 %. Chitosan outperformed Casein at all dosages, curing period (<em>CP),</em> and <em>COV of CBR</em><sub><em>min</em></sub>. This study has demonstrated that the chosen hydrophobic biopolymers can improve subgrade strength in low-volume roads and easily replace conventional materials having a larger carbon footprint. Furthermore, the reliability approach adopted can assess the serviceability and uncertainties associated with biopolymer treatment in fine-grained soils for the range of curing periods and dosages considered.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"473 ","pages":"Article 141014"},"PeriodicalIF":7.4,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143725309","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}

引用次数: 0

Influence of hydraulic cement substitutes on carbonation of calcium silicate cement

IF 7.4 1区工程技术

Construction and Building Materials Pub Date : 2025-03-29 DOI: 10.1016/j.conbuildmat.2025.140800

Amanuel Bersisa , Ki-Yeon Moon , G.M. Kim , Jin-Sang Cho , Solmoi Park

{"title":"Influence of hydraulic cement substitutes on carbonation of calcium silicate cement","authors":"Amanuel Bersisa , Ki-Yeon Moon , G.M. Kim , Jin-Sang Cho , Solmoi Park","doi":"10.1016/j.conbuildmat.2025.140800","DOIUrl":"10.1016/j.conbuildmat.2025.140800","url":null,"abstract":"<div><div>Enhancing the early-age carbonation efficiency and the setting time of calcium silicate cement (CSC) are crucial for its application as a nonhydraulic binder. This study investigates the carbonation efficiency of CSC blended with hydraulic cement substitutes, including Portland cement (PC), calcium aluminate cement (CAC) and calcium sulfoaluminate cement (CSA). Samples were made with 0 %, 10 %, 30 % and 50 % replacement with hydraulic binders and were cured in 20 % CO₂ environment. The carbonation products were characterized microscopically using TGA, XRD and FT-IR, along with compressive strength test. The results revealed that hydrated CSC-PC is mainly characterized by amorphous content, primarily attributed to C–S–H. Meanwhile, samples incorporating CAC and CSA precipitated C₂ASH₈, C₃AH₆ and C₄A$H₁₂ phases. However, carbonation destabilized these phases while precipitating significant CaCO₃ content, a phase that ensures strength development in CO₂-based binders. Incorporation of 30 % CAC and CSA has ensured precipitation of 14.5 g and 34 g per 100 g binder of CaCO₃ after 6 h of carbonation, while the content was lower in pure CSC and CSC-PC samples. After 168 h of CO₂-curing, the amount of unreacted clinker was nearly reduced by half when 50 % of CSC was substituted by hydraulic cement, increasing the compressive strength by 230 %, particularly for CAC- and CSA-containing samples.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"473 ","pages":"Article 140800"},"PeriodicalIF":7.4,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143725340","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}

引用次数: 0

Study on the drying shrinkage behavior and influencing factors of fly ash-based geopolymers under different humidity conditions

IF 7.4 1区工程技术

Construction and Building Materials Pub Date : 2025-03-29 DOI: 10.1016/j.conbuildmat.2025.141041

Hui Peng , ZengLin Long , YiWei Yang

{"title":"Study on the drying shrinkage behavior and influencing factors of fly ash-based geopolymers under different humidity conditions","authors":"Hui Peng , ZengLin Long , YiWei Yang","doi":"10.1016/j.conbuildmat.2025.141041","DOIUrl":"10.1016/j.conbuildmat.2025.141041","url":null,"abstract":"<div><div>Geopolymers have garnered significant research interest due to their low carbon emissions during production, low energy consumption, ability to utilize various industrial waste residues, and superior physicochemical properties. This study systematically investigated the drying shrinkage behavior of fly ash-based geopolymers (FABGs) in gradient and constant humidity conditions under different influencing factors (activator modulus, activator concentration, and liquid-solid ratio). The mechanisms by which these factors influence drying shrinkage were elucidated through a comprehensive suite of macroscopic and microscopic testing methods. The results indicate that FABGs subjected to various influencing factors exhibit distinct capillary pore characteristics and shrinkage resistance properties, thereby manifesting different drying shrinkage behaviors. Specifically, an increase in activator concentration and a decrease in modulus led to the refinement of capillary pores, which in turn increased capillary shrinkage stress under low-humidity conditions, resulting in greater drying shrinkage. Additionally, an increase in the liquid–solid ratio had minimal impact on the distribution of capillary pores but significantly deteriorated the shrinkage resistance properties of the paste, leading to increased drying shrinkage. Moreover, the persistence of geopolymer drying shrinkage is closely related to capillary pore characteristics. Smaller capillary pores hinder the escape of water from the geopolymer paste, thereby prolonging the drying shrinkage process and increasing subsequent shrinkage creep.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"473 ","pages":"Article 141041"},"PeriodicalIF":7.4,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143734531","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}

引用次数: 0

Durability analysis of nanocarbon black-based self-strain sensing ultra-high-performance concrete (UHPC): Effects of moisture content and sea-salt solution exposure

IF 7.4 1区工程技术

Construction and Building Materials Pub Date : 2025-03-29 DOI: 10.1016/j.conbuildmat.2025.141031

Abasal Hussain , Tao Yu , Fangxin Zou

{"title":"Durability analysis of nanocarbon black-based self-strain sensing ultra-high-performance concrete (UHPC): Effects of moisture content and sea-salt solution exposure","authors":"Abasal Hussain , Tao Yu , Fangxin Zou","doi":"10.1016/j.conbuildmat.2025.141031","DOIUrl":"10.1016/j.conbuildmat.2025.141031","url":null,"abstract":"<div><div>Equipping ultra-high-performance concrete (UHPC) with intrinsic strain sensing capability has received significant research interest. Previously, the authors introduced a self-strain sensing UHPC mixed with cost-effective nanocarbon black (nCB-UHPC). Since it is known that the strain sensing performance of smart cementitious composites may be affected by various environmental factors and that the mechanical properties of UHPC depend significantly on curing condition and may change under environmental exposure, this paper presents a recent study aiming to investigate the properties of the new nCB-UHPC under different curing and working conditions. The test results indicate that the mechanical properties of the nCB-UHPC can be improved by prolonged curing duration, and also by dry curing at 105 ℃ due to the accelerated hydration activity at an elevated temperature. However, exposure to sea-salt solution is shown to decrease the mechanical properties due to the formation of cracks by secondary hydration products. On the other hand, the fractional change in resistivity of the nCB-UHPC exhibits a distinct synchronization to the applied compressive stress. Nonetheless, the strain sensitivity decreases with an increase of moisture content due to increasing contact resistance between nCB particles. Furthermore, exposure to the sea-salt solution increases the strain sensitivity of fully saturated nCB-UHPC specimens, thanks to the high mobility of the dissolved ions from the saline solution – an important finding in the context of marine construction. This study lays a foundation for the large-scale implementation of the nCB-UHPC as a field-deployable solution for monitoring the condition of concrete structures.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"473 ","pages":"Article 141031"},"PeriodicalIF":7.4,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143734671","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}

引用次数: 0

Insights into particle breakage induced macroscopic and microscopic behavior of ballast materials under repeated load triaxial compression via DEM

IF 7.4 1区工程技术

Construction and Building Materials Pub Date : 2025-03-29 DOI: 10.1016/j.conbuildmat.2025.140857

Pan Tan , Yuanjie Xiao , Meng Wang , Zehan Shen , Yiling Chen

{"title":"Insights into particle breakage induced macroscopic and microscopic behavior of ballast materials under repeated load triaxial compression via DEM","authors":"Pan Tan , Yuanjie Xiao , Meng Wang , Zehan Shen , Yiling Chen","doi":"10.1016/j.conbuildmat.2025.140857","DOIUrl":"10.1016/j.conbuildmat.2025.140857","url":null,"abstract":"<div><div>Ballast particles undergo breakage under the load of trains, which greatly affects the stability and safe operation of ballasted railway. Existing discrete element methods for simulating particle breakage have shortcomings, such as unclear breakage mechanisms and low computational efficiency, making it difficult to reveal the mechanisms of particle breakage and the related deformation processes under cyclic loading. To address this challenge, this paper first simulated the particle breakage by adopting the particle cutting method and then studied the evolution law of particle breakage under repeated triaxial compressive loading. The breakage-related macroscopic and microscopic behaviors including the stress-strain relation, particle rotation, and fabric anisotropy were analyzed accordingly. The results show that the accumulative plastic strain increases with load amplitude, decreases with confining pressure, and increases with load frequency, and that particle breakage exacerbates accumulative plastic strain. Particle breakage primarily occurs in the early stage of cyclic loading, and the ballast breakage index (BBI) is most influenced by load amplitude, followed by load frequency. Particle breakage reduces the magnitudes of internal contact forces and the anisotropy of normal contact forces within the specimens. Increasing load amplitude and frequency promote particle rotation and sliding, while increasing confining pressure suppresses them. When the frequency exceeds 10 Hz, the responses of the particles, such as vibrational acceleration, rotation, and sliding, increase rapidly. These findings provide effective particle-scale indicators for the study of ballasted track.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"473 ","pages":"Article 140857"},"PeriodicalIF":7.4,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143734670","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}

引用次数: 0

Evaluation of the cooling mechanisms and performance of passive radiative cooling coatings in track-slab applications

IF 7.4 1区工程技术

Construction and Building Materials Pub Date : 2025-03-29 DOI: 10.1016/j.conbuildmat.2025.141057

Jiyi Mi , Wuwei Zou , Yan Wang , Yilun Gao , Jinhan Mo , Zhuo Chen

{"title":"Evaluation of the cooling mechanisms and performance of passive radiative cooling coatings in track-slab applications","authors":"Jiyi Mi , Wuwei Zou , Yan Wang , Yilun Gao , Jinhan Mo , Zhuo Chen","doi":"10.1016/j.conbuildmat.2025.141057","DOIUrl":"10.1016/j.conbuildmat.2025.141057","url":null,"abstract":"<div><div>The thermal management of ballastless track slabs is crucial to ensure the long-term durability of high-speed rail systems. However, current techniques fall short of achieving sufficient cooling of track slabs in a simple and efficient approach. In response to this challenge, we investigated the potential application of three commercially available passive radiative cooling (PRC) coatings for the surface cooling of track slabs in this study. The experimental analysis revealed that these PRC coatings demonstrated high solar reflectivity and strong emissivity in the far-infrared spectrum, achieving a significant temperature reduction of 21.5–25.7°C on stainless steel plates compared to uncoated plates. The primary mechanism driving this cooling effect is attributed to the reflection of solar radiation, contributing 706–857 W/m², or 77 %-93 % of the total cooling power density. Self-external radiation contributed limitedly, revealing a large potential for improvement. The optical properties are supposed to be positively correlated with the mesoscopic smoothness of the coating surfaces. Notably, the cooling performances of the same PRC coatings were approximately consistent across different thicknesses, suggesting that material properties rather than thickness are the dominant factors in cooling efficiency. Further application on C55 concrete specimens commonly used for ballastless track slabs validated the effectiveness of PRC coatings, reducing surface temperatures of specimens by an average of 16.2°C and decreasing the internal temperature gradient by 47°C/m. These findings underscore the superior cooling capacity of PRC coatings compared to other heat-dissipation techniques reported in the literature. This study provides a scientific foundation for developing sustainable thermal management strategies in high-speed rail infrastructure and offers insights into the broader application of PRC technology in civil engineering.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"473 ","pages":"Article 141057"},"PeriodicalIF":7.4,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143725310","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}

引用次数: 0

Corrosion behavior of low-temperature enamel (LTE) coating in simulated concrete pore solutions: For rebar protection applications

IF 7.4 1区工程技术

Construction and Building Materials Pub Date : 2025-03-29 DOI: 10.1016/j.conbuildmat.2025.140933

Shenhao Ye , Shusen Wang , Zefeng Liu , Long Ju , Hao Qian , Yi Liu , Dongming Yan

{"title":"Corrosion behavior of low-temperature enamel (LTE) coating in simulated concrete pore solutions: For rebar protection applications","authors":"Shenhao Ye , Shusen Wang , Zefeng Liu , Long Ju , Hao Qian , Yi Liu , Dongming Yan","doi":"10.1016/j.conbuildmat.2025.140933","DOIUrl":"10.1016/j.conbuildmat.2025.140933","url":null,"abstract":"<div><div>Rebar corrosion leads to the volume expansion of the steel, causing concrete cracking and accelerating the degradation of reinforced concrete structures. Surface coating is one of the most prevalent ways to protect rebar from corrosion, and low-temperature enamel (LTE) coating has garnered a lot of attention in recent years. In this study, the corrosion behavior and corrosion protection performance of LTE coating in different simulated concrete pore solutions were investigated using scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), Fourier-transformed infrared spectroscopy (FTIR), and electrochemical tests (electrochemical impedance spectroscopy (EIS) and linear polarization resistance (LPR)). The fresh, chloride-contaminated, and carbonated concrete conditions, as well as LTE coatings with varied degrees of damage, were considered. Results indicated that the white precipitate, composed of Ca<sub>5</sub>(PO<sub>4</sub>)<sub>3</sub>OH, CaF<sub>2</sub>, and CaCO<sub>3</sub>, was closely related to the corrosion of LTE coating in saturated Ca(OH)<sub>2</sub> solution, and the Cl<sup>-</sup> (as a catalyst) greatly promoted the generation of white precipitate. The total corrosion resistance of LTE-coated rebar was affected by both LTE coating corrosion degradation and white precipitate enhancement, which was much superior to that of uncoated rebar over the entire immersion ages. The findings of this study clarified the corrosion mechanism of LTE-coated rebars in simulated concrete pore solutions and evaluated their corrosion resistance.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"473 ","pages":"Article 140933"},"PeriodicalIF":7.4,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143725338","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}

引用次数: 0