Journal of building engineering最新文献

{"title":"Fracture properties and reinforcement mechanisms of multi-scale hybrid fiber reinforced ultra-high performance concrete","authors":"Chengyuan Wang, Taidong Guo, Lan Liu, Zhi Cheng, Hui Zhang, Yujie Huang, Yongjie Xu, Zhijun Wang, Zhijun Cheng","doi":"10.1016/j.jobe.2025.113436","DOIUrl":"https://doi.org/10.1016/j.jobe.2025.113436","url":null,"abstract":"This study used microscopic and macroscopic fibers to improve the mechanical and fracture properties of ultra-high performance concrete (UHPC) at multiple scales. Thirteen groups of pre-cracked UHPC beams with different fiber content were tested by three-point bending test, and the crack extension process was demonstrated by digital image correlation (DIC). The results indicated that as the content of multi-scale hybrid fiber increased, the flowability of UHPC gradually decreased. The mechanical and fracture properties of UHPC were most improved with the addition of 0.10 wt% multi-walled carbon nanotubes (MWCNTs), 2 vol% calcium carbonate whiskers (CW), and 3 vol% steel fiber. The compressive and flexural strength of UHPC-3-2-0.10 were 191.6 MPa and 39 MPa, respectively, which were 63.20 % and 95.98 % higher compared to UHPC-R (117.4 MPa and 19.9 MPa). With the increase in mechanical strength, the fracture toughness also increased dramatically. The peak load of UHPC-3-2-0.10 was 7.39 kN, which was 291 % higher than that of UHPC-R (1.89 kN). The <ce:italic>K</ce:italic><ce:sup loc=\"post\"><ce:italic>ini</ce:italic></ce:sup>, <ce:italic>K</ce:italic><ce:sup loc=\"post\"><ce:italic>un</ce:italic></ce:sup>, and fracture energy of UHPC-3-2-0.10 were 3.41 MPa m<ce:sup loc=\"post\">1/2</ce:sup>, 166.75 MPa m<ce:sup loc=\"post\">1/2</ce:sup>, and 7.73 kJ/m<ce:sup loc=\"post\">2</ce:sup>, respectively. In addition, the DIC results showed that hybrid fibers increased the complexity of the crack extension path of UHPC, and the mechanism of hybrid fibers reinforced UHPC was explained by using the scanning electron microscope (SEM) technique. The above results showed that multi-scale hybrid fiber reinforced UHPC exhibited excellent ductility, compressive and flexural strength, fracture toughness, and multiple cracking behavior, and had broad application prospects.","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"94 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144622717","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":"A transformer-based approach for similar layout retrieval and difference detection in architectural drawings of wood frame buildings","authors":"Hao Xie, Qipei Mei, Ying Hei Chui, Haitao Yu","doi":"10.1016/j.jobe.2025.113438","DOIUrl":"https://doi.org/10.1016/j.jobe.2025.113438","url":null,"abstract":"With labor shortages and increasing housing demands, efficient design methods are essential. Prefabricated buildings offer faster construction, better quality, and reduced waste. Typically, similar architectural layouts in prefabricated buildings imply comparable structural designs. Leveraging this correlation enables builders to reference previous designs, thereby reducing design time. However, manually searching databases can be time-consuming. The use of deep learning techniques can expedite this process. Through deep learning, designers can efficiently and accurately search databases for buildings with similar layouts. In this study, a drawing segmentation model was used to extract wall information from layout drawings. Buildings were then grouped into clusters based on this information. Subsequently, a pixel-wise difference method was developed to identify buildings with similar features and to highlight the differences between drawings. Finally, the proposed method was evaluated through two case studies. The results showed the proposed method can achieve acceptable accuracy in finding similar projects and identifying differences.","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"14 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144622739","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":"Seismic retrofit of H-section beam-to-HSS column connections in existing high-rise steel buildings","authors":"Jialiang Jin, Tianhao Yan, Takuya Nagae, Yu-Lin Chung, Luis F. Ibarra","doi":"10.1016/j.jobe.2025.113432","DOIUrl":"https://doi.org/10.1016/j.jobe.2025.113432","url":null,"abstract":"The absence of damping devices and the lack of consideration for long-period ground motions (LPGMs) in the design of 1970s high-rise steel moment-resisting frame (SMRF) buildings have raised concerns about potential damage to beam-to-column connections during long-duration LPGMs. This study focuses on retrofitting commonly used H-section beam-to-HSS column connections in these structures and evaluating their seismic performance under LPGMs. A macro-model, incorporating beam-end fractures, was calibrated and validated using prior quasi-static component tests of three retrofitted connection types. A cyclic pushover analysis was then performed to generate the response of a full-scale retrofitted SMRF building tested at E-Defense shake-table in 2009, accurately reproducing the experimental results. The analysis revealed that retrofitted connections significantly reduced brittle fractures at beam ends; increasing the energy dissipation capacity in the wing plate and modified supplemental weld-retrofitted frames by 3.1 and 2.5 times, respectively. Using experimentally validated parameters, nonlinear numerical analyses of a prototype 21-story SMRF building were conducted to quantify the impact of retrofit strategies and their vertical distribution on seismic performance under LPGMs. The results demonstrated that the proposed retrofit strategies substantially reduced the collapse risk of 1970s high-rise SMRFs. Additionally, mainshock-aftershock analyses showed that the retrofit effectively mitigated weak-story collapse mechanisms caused by beam-end fractures, while significantly enhancing the building’s energy dissipation capacity.","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"14 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144622760","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":"Application of fractal dimensions in predicting the drying shrinkage of metakaolin-based geopolymers","authors":"YiWei Yang, Dunwen Huang, ZengLin Long, Hui Peng","doi":"10.1016/j.jobe.2025.113424","DOIUrl":"https://doi.org/10.1016/j.jobe.2025.113424","url":null,"abstract":"This study develops a fractal dimension-based model for predicting drying shrinkage in metakaolin-based geopolymers (MKBGs) through mercury intrusion porosimetry and thermodynamic analysis. The micropore surface fractal dimension <mml:math altimg=\"si1.svg\"><mml:mrow><mml:msub><mml:mi>D</mml:mi><mml:mrow><mml:mi>s</mml:mi><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math> (pore diameter ≤30 nm, dimension range: 2.27–2.97) demonstrates significant correlations with pore structure parameters: strong negative relationships with porosity (<mml:math altimg=\"si2.svg\"><mml:mrow><mml:msup><mml:mi>R</mml:mi><mml:mn>2</mml:mn></mml:msup></mml:mrow></mml:math> = −0.8923), sub-30-nm pore volume (<mml:math altimg=\"si2.svg\"><mml:mrow><mml:msup><mml:mi>R</mml:mi><mml:mn>2</mml:mn></mml:msup></mml:mrow></mml:math> = −0.8293), and most probable pore size (<mml:math altimg=\"si2.svg\"><mml:mrow><mml:msup><mml:mi>R</mml:mi><mml:mn>2</mml:mn></mml:msup></mml:mrow></mml:math> = −0.7120), alongside a moderate positive correlation with specific surface area (<mml:math altimg=\"si2.svg\"><mml:mrow><mml:msup><mml:mi>R</mml:mi><mml:mn>2</mml:mn></mml:msup></mml:mrow></mml:math> = 0.5892). Ds2 further serves as a robust indicator of macroscopic properties, exhibiting a linear correlation with compressive strength (<mml:math altimg=\"si2.svg\"><mml:mrow><mml:msup><mml:mi>R</mml:mi><mml:mn>2</mml:mn></mml:msup></mml:mrow></mml:math> = 0.9392) and effectively characterizing pore connectivity through chloride migration coefficients (<mml:math altimg=\"si2.svg\"><mml:mrow><mml:msup><mml:mi>R</mml:mi><mml:mn>2</mml:mn></mml:msup></mml:mrow></mml:math> = 0.7388) and internal humidity decay kinetics (daily <mml:math altimg=\"si2.svg\"><mml:mrow><mml:msup><mml:mi>R</mml:mi><mml:mn>2</mml:mn></mml:msup></mml:mrow></mml:math> &gt; 0.9 at 50 % RH). By establishing a <mml:math altimg=\"si1.svg\"><mml:mrow><mml:msub><mml:mi>D</mml:mi><mml:mrow><mml:mi>s</mml:mi><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>-dependent humidity evolution model (<mml:math altimg=\"si2.svg\"><mml:mrow><mml:msup><mml:mi>R</mml:mi><mml:mn>2</mml:mn></mml:msup></mml:mrow></mml:math> &gt; 0.95), we achieve drying shrinkage prediction with minimal deviations (e.g., 481 <ce:italic>με</ce:italic> for 40 % activator concentration). This approach provides a practical framework for geopolymer durability optimization while circumventing complex humidity measurements.","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"13 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144622718","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":"Improvement of mechanical properties and carbon sequestration effect of carbide slag-carbonization curing on cement-based materials","authors":"Dao-Lin Sun, Yonghong Miao, Jianguo Zhu, Peng Wang, Yulong Zheng, Kaiwei Lu, Gui-Yu Zhang","doi":"10.1016/j.jobe.2025.113439","DOIUrl":"https://doi.org/10.1016/j.jobe.2025.113439","url":null,"abstract":"The construction industry is one of the main sources of global carbon emissions. Using industrial solid waste calcium carbide slag (CCS) to replace part of cement clinker and combining it with carbonization curing technology is an important way to achieve carbon reduction and resource recycling. This paper studies the effect of different CCS dosages on the performance of ordinary Portland cement (OPC) in combination with carbonation curing, and explains the synergistic effect of its mechanical properties, microstructural changes and carbon fixation capacity. The results demonstrate that: (1) The addition of CCS will reduce the mechanical strength, while the addition of 5% CCS during carbonation curing can increase the 28-day compressive strength by about 18%; (2) CCS significantly extends the carbonation depth, and the CO<ce:inf loc=\"post\">2</ce:inf> absorption can reach 25.91% at a CCS dosage of 20%; (3) Microscopic mechanism analysis shows that the carbonation product is mainly calcite CaCO3, which can fill the voids and optimize the structure, but the excessive generation of carbonation products will cause volume expansion and destroy the integrity of the matrix. Through the research in this article, it can be found that the addition of an appropriate amount of CCS combined with carbonation curing can synergistically improve the mechanical properties and carbon fixation efficiency of cement-based materials.","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"84 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144622761","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":"Rheology and setting of self-compacting concrete incorporating high volume of fly ash and internal curing via coal and wood bottom ash","authors":"Roberto Rodríguez-Álvaro, Sindy Seara-Paz, Fernando Martínez-Abella, Belén González-Fonteboa","doi":"10.1016/j.jobe.2025.113426","DOIUrl":"https://doi.org/10.1016/j.jobe.2025.113426","url":null,"abstract":"The continuous development of innovative high performance concretes is encouraging the use of new and sophisticated techniques to study their performance. In this article, a rheometer is used to determine the rheological parameters (dynamic yield stress, viscosity, yield stress at rest and thixotropy) of an internally cured self-compacting concrete with fly ash blended cement. This research is motivated by the scarcity of rheological studies regarding internally cured concretes. Coal bottom ash (CBA) and wood bottom ash (WA) were used as internal curing water reservoirs. Air content, setting times and temperature rise under semi-adiabatic conditions were also analysed. The results indicate that ball bearing effect of fly ash decreased the amount of high range water reducer admixture added to the mortars to get similar workability. Furthermore, all the rheological parameters increased when using coal bottom ash and, more remarkably, wood ash, due to their irregular shape, rough texture and some minor water absorption. Internal curing of fly ash blended cement concrete has no detrimental effects on the fresh state properties, but special attention must be paid to the pre-wetting of porous aggregates. If the internal curing water reservoirs are wetted below their water absorption capacities, their use reduces workability and setting times. Therefore, the practicality of the proposed mixtures relay mainly on the care taken during their design and materials conditioning. The future research efforts should focus on the development of new mixes with different supplementary cementitious materials and new conditioning techniques that guarantee a precise pre-wetting.","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"94 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144622763","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":"Enhancement of flexural performance of RC slabs under impact loading using ultra-high-performance fiber-reinforced concrete","authors":"Booki Chun, Hyukjun Ahn, Jae-Yeol Cho, Doo-Yeol Yoo","doi":"10.1016/j.jobe.2025.113378","DOIUrl":"https://doi.org/10.1016/j.jobe.2025.113378","url":null,"abstract":"This study examined the impact resistance and residual capacity of reinforced concrete (RC) slabs subjected to high velocity bending loads, particularly focusing on the effects of reinforcement ratio and concrete type. Two types of concrete were considered: normal-strength concrete (NSC) and ultra-high-performance fiber-reinforced concrete (UHPFRC). Experimental results demonstrated that NSC exhibited a brittle failure in tension with limited strain capacity, whereas UHPFRC displayed superior ductility. Under static loading, the UHPFRC slab reached a markedly higher peak load than that of the NSC slab. Impact test results indicated that the reinforcement ratio had minimal influence on the peak reaction force, whereas the incorporation of UHPFRC led to a significant increase. Increasing the reinforcement ratio contributed to a reduction in deflection under impact loading, while replacing NSC with UHPFRC resulted in an even more substantial improvement. Despite the higher reaction force, UHPFRC was highly effective in limiting deflection. In addition, UHPFRC slabs demonstrated excellent residual flexural capacity, maintaining their load-carrying ability even after experiencing impact-induced damage. Numerical analyses were carried out to validate the experimental results and reinforce the observed findings. The simulations demonstrated a strong correlation with the experimental data, accurately reproducing the time histories of both impact and reaction forces, as well as the maximum deflections. In addition, the analyses effectively reflected key experimental observations, notably the influence of concrete type and reinforcement ratio on impact behavior, thereby supporting the robustness and reliability of the experimental conclusions.","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"686 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144577738","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":"Experimental studies on pullout performance of anchor studs in high-performance concrete with hybrid steel fibers and synthetic fibers","authors":"Zhao Chen, Jiajun Liu, Feng Zhu, Kaile Feng, Ioannis Boumakis","doi":"10.1016/j.jobe.2025.113380","DOIUrl":"https://doi.org/10.1016/j.jobe.2025.113380","url":null,"abstract":"Pullout performance of studs in high-performance hybrid fiber-reinforced concrete (HPHFRC) with varying proportions of steel fibers and TX12 synthetic fibers is investigated. A total of 24 unconfined anchor pullout tests were conducted, including eight scenarios of hybrid fiber combinations. The failure modes, ultimate tensile strength (<ce:italic>N</ce:italic><ce:inf loc=\"post\"><ce:italic>u</ce:italic></ce:inf>), and pullout load-displacement behavior of studs were analyzed. The incorporation of fibers significantly enhanced <ce:italic>N</ce:italic><ce:inf loc=\"post\"><ce:italic>u</ce:italic></ce:inf> and improved post-peak ductility. Hybrid fibers significantly enhance concrete performance compared to single fibers by improving crack resistance and creating a bridging network, leading to greater ultimate tensile strength, ductility, and toughness. Increased fiber content enlarges the bearing area, inducing an edge effect. This alters failure modes and anchorage performance, requiring greater clear distances to prevent radial cracking or splitting failure. A modified predictive model for <ce:italic>N</ce:italic><ce:inf loc=\"post\"><ce:italic>u</ce:italic></ce:inf> in HPHFRC is proposed, considering the influence of different fiber types. Compared to existing models, the proposed model demonstrated superior agreement with experimental data.","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"14 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144578464","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":"Optimal Design of Acoustic Ventilated Metasurfaces Using Enhanced Whale Optimization Algorithm","authors":"Chenxv DU, Yijuan GU, Hao-Wen D.O.N.G., Yao Wei CHIN, Zhenbo LU","doi":"10.1016/j.jobe.2025.113370","DOIUrl":"https://doi.org/10.1016/j.jobe.2025.113370","url":null,"abstract":"To address the problem of construction site noise interference while accommodating ventilation needs within confined spaces of urban buildings, this paper proposes a joint simulation approach utilizing the finite element method and an enhanced whale optimization algorithm (EWOA). This method systematically analyzes how the structural dimensions of ventilated acoustic metamaterials (VAM) sub-cavities and the shapes of central through-holes affect acoustic performance. By implementing a step-by-step optimization strategy, we systematically investigated the effects on acoustic performance, leading to the successful development of exceptionally ventilated ultra-thin acoustic metamaterials (EVUAM) that excels in both ventilation and sound insulation. The sub-cavity structure was first optimized and designed, and subsequently, the shape of the central through-hole was further optimized to balance the ventilation and acoustic insulation effects while maintaining the results of the optimization of the sub-cavity structure. The EVUAM achieved a broadband noise insulation effect of at least 6 dB in the frequency range from 500 to 2000 Hz, features a compact structure with a thickness of just 60 mm, and shows a 67% increase in ventilation capacity compared with that of the original VAM. Based on EVUAM, a novel acoustic barrier structure was developed through numerical simulation, achieving a noise attenuation performance exceeding 10 dB in specific frequency bands, which demonstrates an improvement of over 4 dB compared to conventional engineering benchmarks. Experimental validation demonstrates strong agreement between physical prototypes and simulations at critical frequency points. Detailed simulation and experimental verification support the effectiveness of the joint simulation methodology and step-by-step optimization strategy as well as the excellent performance of EVUAM in real-world applications. This new design not only enhances air ventilation but also improves noise insulation as much as possible, addressing the need for healthy and comfortable indoor environments in urban buildings, and providing valuable engineering insights for low-frequency broadband noise reduction technology.","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"32 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144578121","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":"Effect of Highly Dispersed Hybrid Carbon Nanomaterials on the Durability of High-Volume Fly Ash Based Cementitious Mortar","authors":"Sameer.Kumar Maurya, Kanchna Bhatrola, N.C. Kothiyal, Chander Prakash","doi":"10.1016/j.jobe.2025.113354","DOIUrl":"https://doi.org/10.1016/j.jobe.2025.113354","url":null,"abstract":"This research focused on increasing the durability of high-volume fly ash (HVFA) cementitious mortar with the incorporation of dispersed graphene oxide (GO), functionalized carbon nanotubes (FCNTs), and their hybrids (HCNMs) at different dosages. The dispersion levels of GO, FCNTs, and HCNMs, both with and without superplasticizer (SP), were assessed via UV–vis spectroscopy in an aqueous medium. The effects of these nanomaterials were evaluated by electrical resistivity, water absorption, and resistance to acid and sulfate attacks on HVFA cementitious mortar. The hybrid GO/FCNTs mixture, incorporated at a dosage of 0.04% by weight of binder (cement + fly ash), exhibited the highest electrical resistivity (69.23 kΩ·cm) compared to individual GO and FCNTs. Moreover, incorporating 0.04% HCNM in HVFA cementitious mortar significantly reduced water absorption, achieving values of 3.9047 mm at 28 days and 2.44172 mm at 90 days of curing. After an acid attack, HVFA cementitious mortar with 0.04% HCNMs (by the weight of binder) presented the minimum decrease in compressive strength, with losses of 10.33% at 28 days and 38.89% at 90 days. Similarly, after the sulfate attack, the exact dosage of HCNMs led to the most remarkable improvement in compressive strength, increasing by 30.85% at 28 days and 11.84% at 90 days compared to simple water-cured samples. The results of this investigation show that HCNMs considerably enhance the durability performance of HVFA cementitious mortar.","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"2 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144577739","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}