Construction and Building Materials最新文献

{"title":"Investigating the impact of porous steel slag aggregates on the low-temperature crack resistance of asphalt concrete","authors":"Zehan Shen ,&nbsp;Yuanjie Xiao ,&nbsp;Ke Hou ,&nbsp;Yuliang Chen ,&nbsp;Fanwei Meng","doi":"10.1016/j.conbuildmat.2024.138914","DOIUrl":"10.1016/j.conbuildmat.2024.138914","url":null,"abstract":"<div><div>The macroscopic and microscopic mechanisms of the impact of the porous characteristics of steel slag aggregates on the low-temperature crack resistance of asphalt concrete are not yet fully understood, which is detrimental to the effective maintenance of the durability of asphalt pavement containing steel slag aggregates. To address this deficiency, various index property tests were first conducted on steel slag aggregates, and the basic shape features of steel slag particles were captured and quantified through blue light laser scanning. Subsequently, the gradation of steel slag asphalt concrete (SSAC) was optimized, and two new preparation techniques for steel slag asphalt concrete were proposed. Finally, based on the laboratory low-temperature three-point bending (TPB) test, a refined discrete element method (DEM) model of the SSAC beam that can characterize various microscopic groups was constructed. The experimental research results show that controlling the heating temperature of steel slag aggregates according to their moisture content can ensure the full evaporation of pore moisture. Concurrently, extending the wet mixing time can ensure that the asphalt mortar fully fills the surface pores of the steel slag aggregates, and the low-temperature crack resistance of the SSAC specimens treated as above all satisfies the specification requirements. The numerical simulation results show that stress concentration occurs near the pores of the steel slag aggregates, which directly explains why cracks tend to appear near such pores. The higher the porosity of the steel slag aggregates, the greater the decrease in the comprehensive index of low-temperature crack resistance (up to a decrease of 6.5 %), and the easier it is for cracks to develop from the pores of steel slags. Whether or not the pores of steel slags are filled with asphalt mortar has a greater impact on the low-temperature fracture performance of SSAC. When the pores of steel slags are not filled with asphalt mortar, as the porosity of steel slags increases, the degree of decrease in u_0 increases (up to a decrease of 22.7 %), and the internal damage of steel slags also increases. In actual engineering applications, it is recommended to control the content of large-pore steel slag aggregates and ensure that the asphalt mortar fully fills the pores of the steel slag aggregates to improve low-temperature crack resistance of SSAC.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"453 ","pages":"Article 138914"},"PeriodicalIF":7.4,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142659291","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":"High-efficiency dual protection of photoelectrochemical cathodic protection coating with In2O3/C3N4/CNT nanocomposites for 304 stainless steel in marine environment","authors":"Xiaoying Zhang ,&nbsp;Xiaoyuan Li ,&nbsp;Xiaoqing Wang ,&nbsp;Zuquan Jin","doi":"10.1016/j.conbuildmat.2024.139096","DOIUrl":"10.1016/j.conbuildmat.2024.139096","url":null,"abstract":"<div><div>A photoelectrochemical cathodic protection coating with EP/In₂O₃/C₃N₄/CNT composite was designed and its anti-corrosion mechanism was further investigated. It was found that the introduction of In₂O₃/C₃N₄ not only densified the microporous structure but also enhanced the hydrophobicity, tensile strength and UV aging resistance of epoxy resin (EP) coatings, improving the physical shielding effects of the coating. In addition, the photogenerated electrons produced by In₂O₃/C₃N₄ nanocomposites could transfer to surface of 304 SS through the electronic transmission network of CNT under illumination. Owing to its dual protection, the corrosion current (I_corr) of 304 SS/EP/In₂O₃/C₃N₄/CNT reduced by 95.8 % and 67.8 % of that of 304SS and 304 SS/EP in dark, respectively. Under illumination, the OCP values of EP/In₂O₃/C₃N₄ and EP/In₂O₃/C₃N₄/CNT composite coatings were rapidly shifted negatively to −170 mV and −274 mV, respectively, which were both lower than the self-corrosion potential of 304 SS. Therefore, the introduction of optoelectronic nanoparticles into coatings is believed to be an effective strategy for providing dual protection for metals, which not only improved the physical shielding effects of the coating but also enhanced the photocathodic protection performance at the dark state.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"453 ","pages":"Article 139096"},"PeriodicalIF":7.4,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142659312","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":"Gas production and slurry expansion behavior of hydrogen peroxide foamed cement pastes","authors":"Wenjian Xie ,&nbsp;Bing Chen ,&nbsp;Hui Rong","doi":"10.1016/j.conbuildmat.2024.139006","DOIUrl":"10.1016/j.conbuildmat.2024.139006","url":null,"abstract":"<div><div>This study investigated the foaming behavior of hydrogen peroxide (H₂O₂) foamed cement pastes, with a particular focus on gas production and slurry expansion processes. The effects of varying manganese dioxide (MnO₂) dosage (0 %–2 %) and H₂O₂ dosage (3 %–9 %) on the foaming process of fresh slurry and the properties of hardened specimens were examined. The findings revealed that gas production from H₂O₂ decomposition followed pseudo-first-order kinetics, with a portion of the generated gas volume converting into slurry volume at lower reaction speeds. While higher H₂O₂ dosages more effectively improved the final gas and slurry volume, increased MnO₂ dosages were more effective in accelerating the foaming process and thereby improving H₂O₂ and gas utilization efficiency. Furthermore, higher MnO₂ dosages raised the first-order reaction rate constants of the gas production curves, whereas higher H₂O₂ dosages had the opposite effect. Additionally, increased MnO₂ or H₂O₂ dosages led to larger pore sizes and a reduction in dry density, compressive strength, and thermal conductivity. These findings underscore the significance of characterizing the foaming process and offer insights into the foaming mechanisms of cement pastes.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"454 ","pages":"Article 139006"},"PeriodicalIF":7.4,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142651078","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":"Enhancing sustainability in concrete construction: Utilizing copper slag for improved properties of geopolymer concrete","authors":"Aman Deep,&nbsp;Pradip Sarkar","doi":"10.1016/j.conbuildmat.2024.139044","DOIUrl":"10.1016/j.conbuildmat.2024.139044","url":null,"abstract":"<div><div>Geopolymer concrete (GPC), utilizing aluminosilicate precursor materials as binders, stands as an eco-friendly alternative to Portland cement concrete. These precursors commonly include natural resources like metakaolin, volcanic ash, and industrial solid waste such as fly ash (FA) and ground granulated blast furnace slag (GGBFS). However, despite not utilizing cement, GPC still faces environmental challenges due to the use of natural aggregates, leading to resource depletion. To mitigate this issue, researchers have explored replacing natural aggregates with waste materials, aiding both resource conservation and waste management. Copper slag (CS) is one such waste material with potential as fine aggregate in GPC. This study conducts a comprehensive evaluation of FA-GGBFS-based GPC incorporating CS as fine aggregate, revealing notable enhancements in transport, durability, and strength properties. The optimal replacement of 60 % natural sand with CS in GPC resulted in a 20–25 % increase in compressive strength, a 10–15 % improvement in slake durability, an 18–40 % reduction in water absorption, a 30–39 % decrease in permeable voids, and a 26–47 % reduction in depth of wear, all in comparison to the control specimen made with natural sand only. Thus, incorporating CS as a fine aggregate in GPC is recommended as an effective approach to enhance mechanical performance and durability, while contributing to sustainable construction practices.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"453 ","pages":"Article 139044"},"PeriodicalIF":7.4,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142659310","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":"Analysis of vibration responses in a large airport ground transportation centre caused by maglev and subway trains","authors":"Lidong Wang ,&nbsp;Tianyang Sun ,&nbsp;Jingcheng Chen ,&nbsp;Zhen Zhao ,&nbsp;Ying Yang ,&nbsp;Zhengyu Fu ,&nbsp;Yan Han","doi":"10.1016/j.conbuildmat.2024.139144","DOIUrl":"10.1016/j.conbuildmat.2024.139144","url":null,"abstract":"<div><div>This study aims to assess the vibration response of the ground transportation centre (GTC) at an airport integrated transportation hub during the starting and braking processes of underground maglev and subway trains. In this work, we considered the actual motion states of trains entering and exiting the GTC and calculated the traction characteristics of maglev and subway trains. On this basis, the vertical coupling vibration models for a medium- and low-speed maglev train-guideway and a subway train-floating slab track considering variable-speed motion, as well as the vehicle longitudinal motion models, were established, and the vertical and longitudinal fastener forces of the tracks were obtained accordingly. Finally, based on the two-step analysis method, the vertical and longitudinal fastener forces were simultaneously applied to the track–GTC–soil finite element model to evaluate the structural vibrations induced by maglev and subway trains. The results show that the amplitude of the vertical fastener force is an order of magnitude greater than that of the longitudinal fastener force, and the amplitude of the vertical fastener force caused by subway trains is greater than that caused by maglev trains. The starting process of both maglev trains and subway trains results in a greater vertical vibration response of the GTC than the braking process, with the impact of subway trains being greater than that of maglev trains. Within the same area, the vertical vibration level observed at structural column observation points is lower than that at slab observation points. When maglev trains and subway trains start simultaneously, the vibration level response at some points exceeds the specified limit of 75 dB.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"454 ","pages":"Article 139144"},"PeriodicalIF":7.4,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142651086","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 on reactivity of fly ash from different sources in alkali activated system-progressing environmentally construction through waste utilization","authors":"Ke-yu Chen ,&nbsp;Ri-yan Lan ,&nbsp;Ting-quan He ,&nbsp;Phirun Heng ,&nbsp;Jin Xia","doi":"10.1016/j.conbuildmat.2024.139118","DOIUrl":"10.1016/j.conbuildmat.2024.139118","url":null,"abstract":"<div><div>Fly ash, a byproduct of coal-fired thermal power stations, is among the most intricate artificially produced substances. The challenge of its suitable disposal has emerged as both an ecological issue and a squandering of potentially resources. Fly ash has good pozzolanic activity and contains reactive Al and Si components, it has the potential to dissolve under alkaline conditions to form a dense green gel, i.e. alkali activated binder. But, the widespread implementation of fly ash from different sources in generation of products is constrained by the heterogeneity of raw-material supply. In this work, physical performances, chemical-compositions, microstructures, element distribution, crystal structure, chemical-bonds, glassy content, as well as existence form of glassy-phases of eleven fly ashes sourced from different province in China were investigated via FESEM-EDS, XPS, XRD-Rietveld, FTIR, TEM NMR analysis. Then, a reactivity index of fly ash (<em>R</em> value) that concerned the effects of both initial state, particle morphology, internal composition was proposed. <em>R</em> value has been demonstrated to exhibit high predictive accuracy (<em>R</em>² = 0.81–0.93) for predicting the strengths development of alkali activated products prepared with different activator modules, especially at early period. A further eleven literature datasets were utilized to validated against the accuracy of the predictions. <em>R</em> value facilitates an effective evaluation of fly ashes' fitness for fabricating high-strength alkali activated composites.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"454 ","pages":"Article 139118"},"PeriodicalIF":7.4,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142651080","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 the mineral powder to strengthen polyurethane grouting materials for crack repair of asphalt pavements","authors":"Kun Xiong ,&nbsp;Jiupeng Zhang ,&nbsp;Yinzhang He ,&nbsp;Junbo Li ,&nbsp;Mingliang Zhang ,&nbsp;Rui Li ,&nbsp;Jianzhong Pei ,&nbsp;Yuanyuan Li ,&nbsp;Lei Lyu","doi":"10.1016/j.conbuildmat.2024.139023","DOIUrl":"10.1016/j.conbuildmat.2024.139023","url":null,"abstract":"<div><div>Cracking in asphalt pavement may lead to structural distress while existing crack repair materials have significant shortcomings in terms of cost and construction efficiency. This study incorporates mineral powder into the polyurethane grouting materials to provide a more economical and durable solution for repairing cracks in asphalt pavement. The results of bonding and tensile tests show that excessive mineral powder may deteriorate the mechanical properties of polyurethane grouting materials, which is caused by the agglomeration of mineral powder observed by the microscale characterization. Characterization tests indicate that ultraviolet exposure results in the evolution of the chemical components and thermal stability of polyurethane grouting materials, subsequently causing the degeneration in the mechanical properties. The addition of mineral powders was found to increase the tensile strength of polyurethane grouting materials after Ultraviolet aging by 12 %, while the elongation at break measured in tensile tests remained essentially unchanged. The results of the splitting test, bending test, and immersion Marshall test prove the enhanced low-temperature property and moisture resistance of mineral powder-modified polyurethane grouting materials as compared to the styrene-butadiene-styrene emulsified asphalt. The economic analysis shows that this study presents a practical approach to cost-effective asphalt pavement crack repair, offering insights for enhancing the durability of asphalt pavements.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"453 ","pages":"Article 139023"},"PeriodicalIF":7.4,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658891","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":"Enhanced anticorrosion mechanism of photocathodic protection coatings with zinc indium sulfide/titanium oxide Z-scheme heterojunctions","authors":"Zheng Li ,&nbsp;Xiaoying Zhang ,&nbsp;Zuquan Jin ,&nbsp;Haosen Jiang ,&nbsp;Xiaoqing Wang ,&nbsp;Yuehua Chen ,&nbsp;Yue Zhang ,&nbsp;Baorong Hou","doi":"10.1016/j.conbuildmat.2024.139109","DOIUrl":"10.1016/j.conbuildmat.2024.139109","url":null,"abstract":"<div><div>In order to develop novel anti-corrosion technologies of metals, the photoelectrochemical cathodic protection (PECCP) coating with zinc indium sulfide/titanium oxide (Zn₂In₂S₅/TiO₂) was successfully fabricated and its enhanced anticorrosion mechanism was explored in marine environment under light and dark condition, respectively. It found that the improvement of anticorrosion performance is due to the introduction of Zn₂In₂S₅/TiO₂ with Z-scheme heterojunctions, which has been verified systematically through theoretical calculations and electrochemical experiments. Under illumination, the photoelectrons generated by Zn₂In₂S₅/TiO₂ Z-scheme heterojunctions were accumulated on the conduction band (CB) of Zn₂In₂S₅ at an internal electric field (IEF) pointing from Zn₂In₂S₅ to TiO₂, which endowed Zn₂In₂S₅/TiO₂ with strong oxidation-reduction ability to provide PECCP for Q235CS and 304SS in 3.5 wt% NaCl. In the dark state, Zn₂In₂S₅/TiO₂ Z-scheme heterojunctions served as nanofills to enhance the maze effect, ensuring the remarkable anticorrosion performance of PECCP coating. Furthermore, the protective effect of Zn₂In₂S₅/TiO₂ coating was quantified as 74.23 % and 98.91 % for 304SS and Q235CS in 3.5 wt% NaCl for 30 days, respectively.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"453 ","pages":"Article 139109"},"PeriodicalIF":7.4,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142659307","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":"Using graphene oxide to enhance the bonding properties between carbon fibers and cement matrix to improve the mechanical properties of cement-based composites","authors":"Wanfu Qiao ,&nbsp;Mingxin Shi ,&nbsp;Tianyi Ban ,&nbsp;Bo Hou ,&nbsp;Wenjiao Zhang ,&nbsp;Xiangqing Kong","doi":"10.1016/j.conbuildmat.2024.138992","DOIUrl":"10.1016/j.conbuildmat.2024.138992","url":null,"abstract":"<div><div>The mechanical properties of carbon fiber (CF) reinforced cement-based materials are significantly influenced by the interface performance between CF and cement matrix. Improving this interfacial bond can be achieved through the electrophoretic deposition (EPD) method, using graphene oxide (GO). The efficiency and quality of GO deposition on the CF surface are directly related to the EPD parameters. Therefore, in this study, GO electrophoretic deposition CF (GO/CF) was prepared by controlling two key EPD parameters: voltage (10 V, 15 V, 20 V) and time (20 min, 40 min, 60 min). Furthermore, the reinforcing effects of the GO/CF obtained through EPD treatment was compared to those of 3-aminopropyltriethoxysilane modified CF (APS/CF) prepared by common surface treatment method (silanization). The results of single fiber pullout test indicated that GO/CF-15/60 (treated at 15 V for 60 min) had the best bonding performance with cement matrix among the silanized and various EPD-treated samples. Compared to untreated CF, the bond strength of GO/CF-15/60 to the matrix increased by 262 %, and it was also 88.5 % higher than that of APS/CF. This is because GO with wrinkled structure and oxygen-containing functional groups form the optimal deposition morphology and quantity on the CF surface under this EPD parameter. This promotes the adhesion of more hydration products to the CF surface, leading to increased densification with the surrounding matrix. In terms of mechanical properties, when the fiber content was 0.5 vol%, the flexural and compressive strengths of GO/CF-15/60 reinforced cement paste increased by 25.53 % and 5.25 % at 28 d, respectively. The improved interfacial properties facilitate better load transfer between the fiber and matrix, effectively inhibiting the propagation of surrounding microcracks and resulting in superior mechanical strength. A comparison of the bond strength of each modified fiber with the mechanical strength of the corresponding cement paste revealed a strong positive correlation. Therefore, by controlling EPD parameters, the optimal interfacial properties of CF/matrix can be achieved, significantly enhancing the mechanical properties of cement-based materials.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"453 ","pages":"Article 138992"},"PeriodicalIF":7.4,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658893","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":"Improved mechanical and microscopic properties of ultra-high-performance concrete with the addition of hybrid alkali-resistant glass fibers","authors":"Pengqiang Zheng ,&nbsp;Yue Li ,&nbsp;Zhongjing Hu ,&nbsp;Ziyang Feng ,&nbsp;Qingbiao Wang ,&nbsp;Weizhen Liu ,&nbsp;Tangsha Shao ,&nbsp;Hao Lv","doi":"10.1016/j.conbuildmat.2024.139002","DOIUrl":"10.1016/j.conbuildmat.2024.139002","url":null,"abstract":"<div><div>Ultra-high-performance fiber-reinforced concrete (UHPFRC), wherein steel fibers are a primary component, is a new cementitious material with high tensile strength and impact resistance. However, steel fibers are susceptible to corrosion in the alkaline environment of concrete matrices. By contrast, alkali-resistant glass fiber (ARGF) exhibits better corrosion resistance. However, few studies have explored the effects of ARGF on UHPFRC, leaving the optimum ARGF content and its enhancement mechanism unclear. Therefore, this study proposes a UHPFRC design that utilizes AR-GF in place of steel fibers. The effects of different types, lengths, and admixtures of AR-GF are investigated using mechanical tests, scanning electron microscopy (SEM), and X-ray diffraction (XRD). The results show that the splitting tensile strength and flexural strength of the UHPFRC increase with fiber length and fiber dosage. The optimum fiber mixing ratio is 30 kg/m³ of 12 mm-long Anti-Crak® 62.4 combined with 0.05 kg/m³ of 6 mm long Anti-Crak® HD, leading to a 23.3 % increase in splitting tensile strength and 15.8 % increase in flexural strength compared to those of undoped concrete. By analyzing the ARGF dispersion pattern at the fracture surface of the flexural test, the ARGF dispersion analysis method was proposed. SEM shows that the ARGF is coated with C-S-H, which increases its adhesion to the concrete matrix. XRD confirms that ARGF does not affect the hydration reaction of the cement in the UHPFRC. Finally, a model of ARGF-reinforced UHPFRC is established to elucidate the reinforcing mechanism. This study provides guidance and a reference for the application of UHPFRC in engineering projects.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"453 ","pages":"Article 139002"},"PeriodicalIF":7.4,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142659473","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}