Case Studies in Construction Materials最新文献

{"title":"Effects of day-night temperature fluctuations on top-down cracking development in road structures","authors":"Ting Li ,&nbsp;Haoyu Qiao ,&nbsp;Peng Xu ,&nbsp;Guangqing Yang","doi":"10.1016/j.cscm.2025.e04991","DOIUrl":"10.1016/j.cscm.2025.e04991","url":null,"abstract":"<div><div>Top-down cracking has become a significant issue in road structures. Temperature is a key factor in the occurrence of top-down cracking. However, there is a lack of research on how day-night temperature fluctuations impact the propagation of top-down cracking in road structures, leading to an incomplete understanding of its development. This study employs the extended finite element method, which is an innovative approach for crack analysis, to create a simulation model of road structure with top-down cracking, integrating thermal boundary theory. The model's accuracy is confirmed through comparison with previous studies. The research then examines the temperature distribution and various influential factors, including ambient temperature, material properties, and cracking characteristics, using the stress intensity factor as the main indicator. It shows that temperature differential and wind speed are key factors influencing the open and shear modes of top-down cracking. Additionally, the study explores the propagation path of top-down cracking in road structure under cyclic temperature loading. Top-down cracking propagates linearly downward within road structure, with displacement showing an increasing trend as the number of temperature cycles rises. The findings provide new insights into the thermally-induced mechanisms behind top-down cracking development in road structures.</div></div>","PeriodicalId":9641,"journal":{"name":"Case Studies in Construction Materials","volume":"23 ","pages":"Article e04991"},"PeriodicalIF":6.5,"publicationDate":"2025-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144513733","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fatigue performance of 3D printed reusable concrete slabs for temporary pavements","authors":"Shizhao Du ,&nbsp;Chunxia Kang ,&nbsp;Xiuli Du","doi":"10.1016/j.cscm.2025.e04989","DOIUrl":"10.1016/j.cscm.2025.e04989","url":null,"abstract":"<div><div>To explore the fatigue performance of 3D printed reusable concrete slabs for temporary pavements, the effect of varied steel fiber volume ratios and fiber lengths on flexural tensile strength and fatigue performance was studied through the bending fatigue tests on 216 3D printed specimens. Fatigue life calculation methods for various failure probabilities were developed using the two-parameter Weibull distribution, and the related fatigue equation was then derived. Furthermore, the fatigue coefficient suitable for 3D printed reusable prefabricated pavement was developed, followed by a revision to the pavement design procedure. The study found that incorporating steel fibers into 3D printed specimens can effectively prevent the development and expansion of transverse cracks, significantly improve the flexural tensile strength, crack resistance, and fatigue resistance of components, and transition their failure mode from sudden brittle failure to ductile plastic failure. The steel fiber volume ratios and lengths significantly impact component flexural tensile strength and fatigue life. The fatigue life of the component increased by 252 % when the <span><math><mrow><msub><mrow><mi>ρ</mi></mrow><mrow><mi>f</mi></mrow></msub><msub><mrow><mi>l</mi></mrow><mrow><mi>f</mi></mrow></msub><mo>/</mo><msub><mrow><mi>d</mi></mrow><mrow><mi>f</mi></mrow></msub></mrow></math></span> increased from 0.00 to 0.60 under the same stress ratio S= 0.65. The stress level in the middle of the long side of the new type of 3D printed reusable prefabricated pavement slabs is higher than in the plate's center and corners, and that was the most unfavorable loading position for the slab. The 20-meter field test section shown that the 3D printed slabs could reduce volume by 40 %, weight by 35 %, and manual labor by 50 % while a 3-fold increase in fatigue life compared to traditional C40 concrete slabs. The study's findings are extremely important for further encouraging the use of 3D printing technology in the transportation field, as well as promoting industrial intelligence industrial intelligence and development.</div></div>","PeriodicalId":9641,"journal":{"name":"Case Studies in Construction Materials","volume":"23 ","pages":"Article e04989"},"PeriodicalIF":6.5,"publicationDate":"2025-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144563815","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Performance enhancement and mechanism analysis of low-carbon cement-stabilized macadam based on vibratory mixing method","authors":"Mengzhen Zhao ,&nbsp;Hao Liu ,&nbsp;Quanlei Wang ,&nbsp;Mingbin Wang ,&nbsp;Zhongda Chen ,&nbsp;Xuancang Wang","doi":"10.1016/j.cscm.2025.e04990","DOIUrl":"10.1016/j.cscm.2025.e04990","url":null,"abstract":"<div><div>The cement-stabilized macadam (CSM) base demands a large amount of cement. However, cement production results in high energy consumption and CO₂ emissions, thereby posing a threat to the environment. Thus, it is essential to seek solutions to reduce CSM cement usage. Uneven cement dispersion in CSM leads to premature pavement distresses and cement waste. The mixing process becomes a crucial factor to dispersion. This study investigates the performance enhancement mechanism of CSM under different mixing processes (static and vibratory mixing) and cement dosages. The unconfined compressive strength of CSM under various cement dosages and two mixing conditions was evaluated. The indirect tensile strength, dry shrinkage, temperature shrinkage, and anti-scour properties of CSM with the same cement dosage but different vibratory mixing conditions were investigated. The microstructure and cement dispersion uniformity in CSM were analyzed via SEM and EDTA testing. Results show that vibratory mixing destroys cement agglomeration through high-frequency elastic waves, strengthens the interfacial transition zone and improves the mixing efficiency in low-efficiency area, promoting uniform distribution of cement hydrated products and aggregates. Compared with static mixing, it increases unconfined compressive strength by over 20 % under different cement dosages, and leads to improvements in the indirect tensile strength, dry shrinkage, temperature shrinkage, and anti-scour performance of CSM with the same cement dosage. The vibratory mixing process can ensure that the performance remains stable while reducing the cement consumption. It is capable of cutting down carbon emissions and energy consumption, thus being a promising and low-carbon construction method.</div></div>","PeriodicalId":9641,"journal":{"name":"Case Studies in Construction Materials","volume":"23 ","pages":"Article e04990"},"PeriodicalIF":6.5,"publicationDate":"2025-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144534238","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 and flexural behavior of concrete-filled hybrid GFRP beams with various interface treatments under humid environmental exposure","authors":"Tuna Ülger,&nbsp;Murat Cavuslu","doi":"10.1016/j.cscm.2025.e04988","DOIUrl":"10.1016/j.cscm.2025.e04988","url":null,"abstract":"<div><div>This study presents an experimental investigation into the long-term flexural behavior and interface shear failure mechanisms of Concrete-Filled Hybrid Glass Fiber Reinforced Polymer (CF-GFRP) beams exposed to humid environmental conditions. The research primarily focuses on enhancing the bond efficiency at the concrete–GFRP interface using different surface treatment techniques aimed at improving load transfer and mitigating premature debonding. The mechanical properties of the constituent materials - including concrete, GFRP profiles, and bonding adhesives—were comprehensively characterized through laboratory testing. A series of three-point bending tests were conducted on a reference GFRP box beam and four hybrid beam specimens, each incorporating a unique surface treatment strategy: natural bonding (untreated), granular coating, epoxy adhesive, and mechanical fastening. Both short-term performance (after 30 days of curing) and long-term durability (following two years of exposure to uncontrolled outdoor conditions) were assessed. The findings revealed that, except for the naturally bonded specimens, the beams retained a significant portion of their flexural capacity over time, with only moderate reductions observed. Among all configurations, the epoxy-bonded beam exhibited the highest initial flexural strength; however, it also demonstrated the greatest performance degradation under environmental exposure, highlighting the critical influence of environmental durability on bonded interfaces. Detailed observations of crack initiation, propagation, and final failure modes emphasized the importance of optimized surface preparation and mechanical interlocking in promoting structural integrity and long-term serviceability of CF-GFRP beams.</div></div>","PeriodicalId":9641,"journal":{"name":"Case Studies in Construction Materials","volume":"23 ","pages":"Article e04988"},"PeriodicalIF":6.5,"publicationDate":"2025-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144519240","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of an innovative powder adhesive based on epoxy-polyester and lignin for production of particleboards","authors":"Miroslav Němec ,&nbsp;Jan Janesch ,&nbsp;Lukáš Sahula ,&nbsp;Kateřina Hájková ,&nbsp;Tomáš Pipíška ,&nbsp;Pavel Král ,&nbsp;Benjamín Petržela ,&nbsp;Štěpán Hýsek","doi":"10.1016/j.cscm.2025.e04985","DOIUrl":"10.1016/j.cscm.2025.e04985","url":null,"abstract":"<div><div>This study presents the development of innovative particleboards bonded with a hybrid powder adhesive composed of epoxy-polyester resin and kraft lignin, aiming to eliminate formaldehyde and volatile organic compounds (VOCs) from the manufacturing process. While powdered epoxy-polyester adhesives are well established in the metal and automotive sectors, their application in wood composites remains largely unexplored and only limited research has explored their potential for particleboard production. Particleboards were manufactured using varying proportions of kraft lignin (0–100 %) to partially or fully replace the epoxy-polyester base. The optimal performance was observed with 20 % lignin substitution, where mechanical properties such as modulus of rupture (MOR = 8.3 MPa), modulus of elasticity (MOE = 1455 MPa), and internal bond (IB = 0.21 MPa) were comparable to or exceeded those of the control variant without lignin. Despite lower mechanical performance at high lignin ratios (≥80 %), 100 % lignin-based boards exhibited improved thermal stability and fire resistance, confirmed by TGA, DSC, and cone calorimetry. SEM analysis revealed that lignin contributed to good particle coverage and homogeneous bonding. These results demonstrate the feasibility of using kraft lignin in powder form as a binder or co-binder in wood-based composites. Such particleboards offer a promising alternative for applications in interior non-load-bearing construction and eco-friendly furniture manufacturing.</div></div>","PeriodicalId":9641,"journal":{"name":"Case Studies in Construction Materials","volume":"23 ","pages":"Article e04985"},"PeriodicalIF":6.5,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144513734","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 shear mechanisms of UHPC-NC reinforced interfaces and grooved & reinforced interfaces","authors":"Jing Tian ,&nbsp;Xinghong Jiang ,&nbsp;Xinan Yang ,&nbsp;Luheng Li ,&nbsp;Jingtao Li","doi":"10.1016/j.cscm.2025.e04982","DOIUrl":"10.1016/j.cscm.2025.e04982","url":null,"abstract":"<div><div>Understanding the shear mechanisms of both reinforced and grooved &amp; reinforced UHPC-NC interfaces is crucial for designing and applying UHPC-NC composite arch structures. In this study, double-shear tests were conducted on these two interface types, with systematic variations in reinforcement spacing and diameter. Based on the analysis of the failure mechanisms, calculation methods for the shear capacity of both interface types were developed. The results revealed two distinct failure modes in the reinforced interface: steel-shear failure and NC-splitting failure. Conversely, the grooved &amp; reinforced interface exclusively exhibited NC-splitting failure. The shear strength of reinforced interfaces shows a proportional increase with reduced rebar spacing, while interfacial slip demonstrates an inverse correlation. Similarly, both interfaces exhibit enhanced shear strength and reduced slip with larger rebar diameters. Analysis of load-slip curves reveals four distinct stages, demarcated by critical transitions in reinforcement stress states. Furthermore, interfacial slip serves as a reliable indicator for deciphering shear-resistance mechanisms in both interfaces. The reinforced interface failed when the rebar dowel force reached either the rebar's ultimate tensile capacity or the NC splitting force. Failure of the grooved &amp; reinforced interface occurred when rebar dowel force increases to the NC splitting force after the groove-induced shear remains at post-transition groove-induced shear resistance. The NC splitting force is proportional to both the spacing and diameter of the reinforcement. The proposed formula can accurately predict the shear capacity of both interface types. The result is a clear guidance for the calculation of the shear strength of UHPC-NC grooved &amp; reinforced interface.</div></div>","PeriodicalId":9641,"journal":{"name":"Case Studies in Construction Materials","volume":"23 ","pages":"Article e04982"},"PeriodicalIF":6.5,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144519241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Construction and field tests of jointed reinforced concrete pavement made of sea sand concrete and GFRP reinforcement","authors":"Xi Wu ,&nbsp;Liang Huang ,&nbsp;Hao Yang ,&nbsp;Shuisheng Li","doi":"10.1016/j.cscm.2025.e04974","DOIUrl":"10.1016/j.cscm.2025.e04974","url":null,"abstract":"<div><div>The utilization of sea-sand concrete (SSC) reinforced with glass fiber reinforced polymer (GFRP) bars presents a viable solution to address both the scarcity of river sand resources and the corrosion susceptibility of conventional steel reinforcement in marine environments. This study presents a field case study of a stretch of jointed reinforced concrete pavement (JRCP) fabricated with GFRP bars and SSC in a port infrastructure project. Mechanical performance of the GFRP-SSC pavement system was investigated through early-age time-dependent behavior observations, vehicle load tests, and numerical analysis. Early-age analysis of the tested pavement section indicated that SSC exhibited greater expansion than river sand concrete (RSC) within the first 5 h after pouring. Additionally, an increased reinforcement ratio of GFRP bars was observed to mitigate concrete shrinkage. The results of vehicle load tests and numerical analysis demonstrate that the GFRP bars maintain relatively low stress level under the design vehicle load, and the stress induced by a single vehicle load is insufficient to cause cracking or failure of the GFRP-reinforced pavement. Then, the effects of design parameters, including the arrangement of GFRP bars, the thickness of the pavement slab, and the elastic modulus of the base layer, on the structural behavior of GFRP-SSC pavement were analyzed through a parametric study. Over all, the case study demonstrates that the GFRP-SSC pavement exhibits comparable working performance to steel reinforced RSC pavement, making it a viable alternative for construction of JRCP engineering in coastal and island regions.</div></div>","PeriodicalId":9641,"journal":{"name":"Case Studies in Construction Materials","volume":"23 ","pages":"Article e04974"},"PeriodicalIF":6.5,"publicationDate":"2025-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144501375","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Innovative gel method: Sustainable crack healing in ceramic powder geopolymer mortars via marine actinomycetes and bioactivated carriers","authors":"Sumeyye Koseoglu ,&nbsp;Merve Kubat ,&nbsp;Mucteba Uysal ,&nbsp;Elif Ozlem Arslan Aydogdu ,&nbsp;Beyza Fahriye Aygun ,&nbsp;Orhan Canpolat","doi":"10.1016/j.cscm.2025.e04954","DOIUrl":"10.1016/j.cscm.2025.e04954","url":null,"abstract":"<div><div>This study addresses the urgent need for efficient self-healing methods in geopolymer mortars (GMs), which, with their favorable low-carbon character, are still vulnerable to microcracking and ongoing durability loss. GMs made of 50 % ceramic powder (CP) and 50 % granulated blast furnace slag (GBFS), synthesized with sodium hydroxide (2–12 M) and sodium silicate (Na₂SiO₃/NaOH = 1.0–2.0) at an initial sand-to-binder ratio of 2.5, were cured at temperatures of 40°C to 100°C. Artificial microcracks with diameters of 0.2 mm and 0.6 mm were created before applying liquid (+S) and gel-like (+J) formulations of <em>S. pasteurii</em> and marine actinomycetes isolated from Marmara Sea sediments for 90-day treatments. Compressive and flexural strength, water absorption, ultrasonic pulse velocity (UPV), and microstructural analyses via SEM/EDS, XRD, and FTIR were considered methods for assessing healing performance. The S1 +S group showed the best mechanical recovery, with compressive and flexural strengths of 42.92 MPa and 8.98 MPa, respectively, while S26 +S showed the best UPV value of 3245.44 m/s, attesting to effective internal consolidation. S13 +S showed the most balanced improvement in acetate-decomposing strains, with compressive strength of 37.20 MPa, flexural strength of 5.63 MPa, and minimized water absorption (7.44 %). Preservation of calcite precipitation and crystalline geopolymeric phases were confirmed via XRD. At the same time, increased carbonate and Si–O–Al bonding in FTIR indicated that the microbe-induced and inorganic polymerized structures occurred simultaneously. EDS also supported these findings, where increased Ca and C contents asserted localized CaCO₃ accumulation and increased peaks for Si and Al confirmed the unstable geopolymerization. All these findings place marine actinomycetes—especially acetate-decomposing strains—at the forefront of prospects for self-sustaining crack healing and structural reinforcement in green GMs.</div></div>","PeriodicalId":9641,"journal":{"name":"Case Studies in Construction Materials","volume":"23 ","pages":"Article e04954"},"PeriodicalIF":6.5,"publicationDate":"2025-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144501268","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Creep and mechanical behavior after sustained loading of red mud-slag based geopolymer concrete at early-age","authors":"Xiaolei Zhang,&nbsp;Yongbao Wang,&nbsp;Jianglong Han,&nbsp;Xu Li","doi":"10.1016/j.cscm.2025.e04980","DOIUrl":"10.1016/j.cscm.2025.e04980","url":null,"abstract":"<div><div>To investigate the effects of stress levels, silica fume contents, fiber types, and fiber contents on the drying shrinkage, creep, and mechanical properties of early-age Red mud-Slag based GeoPolymer Concrete (RS-GPC), a comprehensive series of experiments, including compressive strength, drying shrinkage, creep were conducted. Based on experimental results and existing models, drying shrinkage and creep prediction models, as well as constitutive relationship models before and after creep, were developed. Respectively, the results revealed that the 7-day cube compressive strength, 28-day drying shrinkage, and creep coefficient of RS-GPC ranged from 29.36 to 57.03 MPa, 330–500 με, and 1.71–2.03. The incorporation of silica fume significantly reduced drying shrinkage but notably weakened compressive strength and creep. Conversely, optimal content of steel fiber and basalt fiber enhanced these properties significantly. After creep, the elastic modulus of RS-GPC increased, whereas peak and ultimate strain decreased. For most test groups, axial compressive strength after creep decreased, with the exception of those incorporating silica fume. The proposed stress-strain curve equations demonstrated good agreement with experiment, underscoring the impact of sustained loading on constitutive relationships. In conclusion, silica fume and fibers exhibit dual effects on the mechanical and shrinkage properties of RS-GPC. Moreover, creep significantly reduces axial compressive strength. It is necessary to consider mechanical properties after creep in the structural design of RS-GPC members subjected to sustained loading.</div></div>","PeriodicalId":9641,"journal":{"name":"Case Studies in Construction Materials","volume":"23 ","pages":"Article e04980"},"PeriodicalIF":6.5,"publicationDate":"2025-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144491067","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hybrid fiber-reinforced geopolymer composites with enhanced impact resistance for marine structures","authors":"Yun Xu ,&nbsp;Yichen Zhou ,&nbsp;Ke Zhuang ,&nbsp;Haoliang Wu ,&nbsp;Qian Zhang ,&nbsp;Kai Zhou ,&nbsp;Boyin Ding ,&nbsp;Xiaohuan Meng ,&nbsp;Ziqun Wang ,&nbsp;Zhenqiu Hu ,&nbsp;Jingming Cai","doi":"10.1016/j.cscm.2025.e04984","DOIUrl":"10.1016/j.cscm.2025.e04984","url":null,"abstract":"<div><div>To address the growing demands for corrosion-resistant marine infrastructure in chloride-rich environments, the mechanical properties and damage mechanisms of engineered geopolymer composites (EGC) reinforced with polyvinyl alcohol (PVA) fiber blends and polyethylene (PE) fiber blends under low-velocity impact were investigated in this study. By preparing EGC specimens reinforced with PVA/PE fiber blends with different volume doping (0–2 %), uniaxial tensile, compressive and low-velocity impact experiments were carried out to analyze the effects of fiber blending ratios on the material properties. The results showed that the PVA fibers enhanced the interfacial bonding through hydroxyl bonding, which significantly increased the tensile and compressive strengths of the materials, while the PE fibers exhibited excellent crack control and energy dissipation ability under impact loading due to their high specific surface area and hydrophobicity. During pseudo-static loading, the crack control ability of PVA fiber specimens was better than that of PE fiber specimens; however, PE fiber specimens were able to form a more homogeneous microcrack network under low-velocity impact. The PE/PVA fiber hybrid system (EGC-0.5–1.5) has comprehensive advantages in tensile ductility (7.86 %) and tensile strength (3.85 MPa), making it suitable for high impact demand scenarios. The pure PVA fiber hybrid system (EGC-2–0) can control the tensile crack width to around 39 μ m, while reducing the cost by 14–39 % compared to the PE fiber system. It is suitable for engineering scenarios that require strict crack control and economic considerations.</div></div>","PeriodicalId":9641,"journal":{"name":"Case Studies in Construction Materials","volume":"23 ","pages":"Article e04984"},"PeriodicalIF":6.5,"publicationDate":"2025-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144523468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}