Journal of building engineering最新文献

{"title":"Reducing steel fiber segregation and enhancing UHPC performance with hybrid bamboo fibers: An eco-friendly approach","authors":"Hua Zhao ,&nbsp;Ziwei Li ,&nbsp;Jie Tang ,&nbsp;Tao Zhou ,&nbsp;Tianwang Xiong ,&nbsp;Xiaojian Gao","doi":"10.1016/j.jobe.2025.112741","DOIUrl":"10.1016/j.jobe.2025.112741","url":null,"abstract":"<div><div>Ultra-high-performance concrete (UHPC) has gained widespread attention in civil engineering due to its superior mechanical properties and durability. However, the high cost, density, and susceptibility to segregation of steel fibers during construction limit its broader application. Bamboo fiber, a natural plant fiber characterized by its wide availability, low cost, and environmental friendliness, offers high tensile strength and hygroscopic properties, making it a promising alternative or complementary reinforcement to steel fibers. This study systematically investigates the effects of combining bamboo fibers with steel fibers on the microstructure and macro-scale performance of UHPC. Results reveal that incorporating bamboo fibers significantly enhances internal humidity stability within UHPC, achieving a maximum reduction of autogenous shrinkage by 53.7 %. Additionally, bamboo fibers effectively mitigate the segregation of steel fibers, promoting a more uniform distribution. By adjusting fiber orientation and distribution patterns, bamboo fibers improve the overall material consistency, reducing flexural performance variability by over 90 %. Although the high hygroscopicity of bamboo fibers decreases the workability of fresh concrete, their positive effects on early-age crack resistance and long-term durability have been validated. This study provides scientific evidence supporting the practical application of bamboo fibers in UHPC and introduces a novel approach to developing low-carbon, sustainable construction materials.</div></div>","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"107 ","pages":"Article 112741"},"PeriodicalIF":6.7,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143868369","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":"Flexural behavior of precast concrete cantilever balconies according to various dry connection details","authors":"Sun-Jin Han ,&nbsp;Sang-Yoon Kim ,&nbsp;Seon-Hoon Kim ,&nbsp;Won-Jun Lee ,&nbsp;Deuckhang Lee","doi":"10.1016/j.jobe.2025.112751","DOIUrl":"10.1016/j.jobe.2025.112751","url":null,"abstract":"<div><div>Precast concrete (PC) is increasingly adopted in alignment with the growing trend toward off-site construction (OSC). In residential buildings, however, PC balconies require temporary supports to stabilize their position during installation. To address this challenge, this study developed innovative PC cantilever balcony systems featuring distinct connection details between the PC balcony and bearing wall structures. An experimental campaign was conducted to evaluate their structural performance. Three test specimens were designed to investigate two primary cantilever connection methods: 1) dry mechanical coupler connection; 2) End plate connections using high-strength bolts. Load-deformation responses including strength, failure modes, crack patterns, and strain behavior were analyzed, where the dry mechanical coupler detail exhibited over twice the deformational capacity compared to end plate connections, and end plate connections experienced premature failure due to local buckling or prying action before PC balcony yielding. Specimen capacities were assessed using current design codes combined with existing models accounting for prying action. All possible failure modes including flexural and shear friction failures, bolt shear, and prying action were considered. The evaluation results showed that the specimen with innovative dry mechanical coupler connection was dominated by flexural failure of PC balcony, while that with high-strength bolt connections with a large unsupported length was dominated by prying out strength. It also appeared that the presented method well captured the failure modes of the specimens, and it also provided accurate structural capacities. On this basis, it can be concluded that when bolt connections with end plates are applied instead of mechanical couplers, it is necessary to prevent local and brittle failure due to prying action in the joint region. To this end, unsupported length between bolts must be sufficiently small, or thick end plate must be used.</div></div>","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"107 ","pages":"Article 112751"},"PeriodicalIF":6.7,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143859668","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 fragility analysis method of building structures integrated with probabilistic seismic hazard analysis","authors":"Meng Wang ,&nbsp;Xiangling Gao ,&nbsp;Chao-Lie Ning","doi":"10.1016/j.jobe.2025.112753","DOIUrl":"10.1016/j.jobe.2025.112753","url":null,"abstract":"<div><div>The selection of an optimal earthquake intensity measure (IM) plays a pivotal role in the seismic fragility analysis of building structures. However, the determination of the most suitable earthquake IM remains a subject of debates within seismic engineering community. To address this challenge, a novel method was proposed in this study to produce the recurrence period-based seismic fragility curves by integrating with the probabilistic seismic hazard analysis (PSHA). Departing from the conventional approaches, the proposed method eliminates the reliance on specific earthquake IMs derived from the inputted earthquake ground motions to quantify earthquake intensity levels. Instead, it utilizes the recurrence period of seismic hazards which is obtained from the PSHA as an intermediate variable. Consequently, seismic fragility curves of building structures are expressed as the probabilities of structural seismic responses exceeding the predefined damage states across varying recurrence period of seismic hazards. In the proposed method, three major components are included. First, the PSHA is employed to generate uniform hazard spectra (UHS) at varying recurrence periods of seismic hazards, which subsequently serve as the basis of synthesizing artificial earthquake ground motions. Second, structural seismic response analysis is conducted using the generated artificial earthquake ground motions to predict the engineering demand parameters (EDPs). Third, structural reliability analysis is performed using the probability density evolution method (PDEM) to obtain the probability density function (PDF) of the EDPs. To validate the advantages of the proposed method, a case study was conducted on a twenty-story reinforced concrete (RC) frame structure to generate the recurrence period-based seismic fragility curves. For comparison, the traditional peak ground acceleration (PGA)-based and elastic response spectral acceleration at the fundamental period Sa(T₁)-based seismic fragility curves are evaluated. The investigation results indicated that the PGA-based seismic fragility curves tend to overestimate and the Sa(T₁)-based seismic fragility curves tend to underestimate the recurrence period of structural seismic responses reaching each damage state. The proposed method is beneficial for comparing the difference of seismic performance across a wide range of structural types and vibration periods.</div></div>","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"107 ","pages":"Article 112753"},"PeriodicalIF":6.7,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143868370","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 a federated learning-enabled IoT framework for indoor air quality and HVAC optimization in healthcare buildings","authors":"Montaser N.A. Ramadan ,&nbsp;Mohammed A.H. Ali ,&nbsp;Mohammad Alkhedher","doi":"10.1016/j.jobe.2025.112758","DOIUrl":"10.1016/j.jobe.2025.112758","url":null,"abstract":"<div><div>Maintaining optimal indoor air quality (IAQ) in healthcare buildings is essential for occupant health, energy efficiency, and HVAC system performance. This paper presents a novel IoT-based air quality monitoring and ventilation control system powered by federated learning (FL) for real-time IAQ management. The system deploys multi-sensor IoT units to monitor PM2.5, PM10, CO₂, CH₂O, TVOC, temperature, and humidity in emergency rooms, doctors’ offices, and reception areas across three hospitals. A central hub dynamically adjusts HVAC settings based on real-time sensor data and predictive analytics, ensuring proactive air quality management. Addressable RGB indicators provide real-time IAQ displays and 30-min predictive warnings, enabling timely interventions. To enhance scalability, security, and computational efficiency, we introduce the Hierarchical Adaptive Federated Aggregation (HAFA) algorithm, which improves non-IID data processing and model accuracy in decentralized IAQ monitoring. HAFA achieves 90.8 % predictive accuracy (LSTM) and 88.0 % (CNN), outperforming conventional FL models. Additional performance metrics (R² = 0.87, RMSE = 0.09) validate its robustness. The system integrates LoRaWAN for low-power, long-range communication and HTTPS encryption for secure cloud-based data transmission. This paper demonstrates a scalable and intelligent IAQ control system for sustainable building management in healthcare facilities. By integrating IoT, federated learning, and HVAC optimization, it provides an energy-efficient, secure, and adaptive solution for indoor air pollution control in smart healthcare environments.</div></div>","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"107 ","pages":"Article 112758"},"PeriodicalIF":6.7,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143874805","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":"Aerodynamic characteristics and structural effects of suspending scaffolds for super high-rise building construction","authors":"Tingchen Fang ,&nbsp;Jian Gong ,&nbsp;Xu Dong ,&nbsp;Yuchen Li ,&nbsp;Wei Cui ,&nbsp;Yu Feng","doi":"10.1016/j.jobe.2025.112718","DOIUrl":"10.1016/j.jobe.2025.112718","url":null,"abstract":"<div><div>This study physically and numerically investigated the wind-induced loads and structural effects of suspending scaffolds for an integral steel platform system. Specifically, the wind load shape coefficients for the suspending scaffolds were determined based on wind tunnel tests, and the influences of protective net blocking ratios (denoted as <em>α</em>_<em>f</em>) and the interference effects of the adjacent core tube with varying blocking ratios (denoted as <em>α</em>_<em>t</em>) on the wind loads were systematically investigated. Subsequently, the wind-induced responses of the suspending scaffolds were analyzed based on transient dynamic analysis methods. The results indicate that the existing Code provisions regarding wind loads on suspending scaffolds tend to be conservative. The wind load shape coefficient of the suspending scaffolds is directly proportional to <em>α</em>_<em>f</em> and inversely proportional to <em>α</em>_<em>t</em>. Accordingly, the maximum wind load shape coefficient (0.933) occurs at the <em>α</em>_<em>t</em> = 0.5 and <em>α</em>_<em>f</em> = 0.7, while the minimum one (0.263) is observed at the <em>α</em>_<em>t</em> = 0.8 and <em>α</em>_<em>f</em> = 0.4. Additionally, an empirical model for the critical wind load shape coefficient envelope of the suspending scaffolds, accounting for the impacts of the <em>α</em>_<em>f</em>, <em>α</em>_<em>t</em>, and flow field characteristics (i.e., uniform and turbulent flow fields), was developed to guide the relevant structural wind-resistant design. Notably, the maximum wind-induced responses of the suspending scaffolds occur at the middle of the bottom edge on the windward side, emphasizing the need for targeted reinforcement measures in this area to ensure structural safety.</div></div>","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"107 ","pages":"Article 112718"},"PeriodicalIF":6.7,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143877618","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":"Robustness analysis for innovative tall composite modular buildings with composite shear walls","authors":"Gaurav Swami,&nbsp;Huu-Tai Thai,&nbsp;Xuemei Liu","doi":"10.1016/j.jobe.2025.112712","DOIUrl":"10.1016/j.jobe.2025.112712","url":null,"abstract":"<div><div>This research investigates the robustness of tall composite modular buildings using alternate load path method (ALP) subjected to sudden element removal under the effect of gravity loads. A finite element model of a 50-storey modular building was developed with concrete filled steel tubular (CFST) columns and composite shear walls (CSW) in Abaqus. Core CSW were designed instead of conventional reinforced concrete shear walls to benefit with their modularity, effective time frame and better load sharing. Conventional steel columns were replaced with CFST columns to provide improved buckling and post buckling resistance. Non-linear dynamic and static analyses were conducted to investigate the real-time response, load transfer behavior and the ultimate failure scenarios. The 50-storey composite modular building showed sufficient resistance against progressive collapse under column and module loss scenarios. It was observed that the inter-module connections play a critical role in a module loss scenario, whereas the adjacent beams play a crucial role in the event of column removal. Dynamic amplification factors (DAF) were interpreted using the non-linear static analysis and compared with the available guidelines by general service administration (GSA). DAF of 1.20 was calculated for the 50-storey modular building subjected to critical corner module removal which was significantly lower than the value of 2.0 as suggested by GSA guidelines. A detailed parametric study was conducted to evaluate the DAF for various locations in the floor layout and the elevation of building. DAF of 1.223 and 1.216 were observed for a 30-storey and 40-storey modular building, respectively.</div></div>","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"107 ","pages":"Article 112712"},"PeriodicalIF":6.7,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143868353","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":"Hygrothermal response capacity prediction of traditional buildings in hot-humid regions of China under future climate change","authors":"Zifeng Ye ,&nbsp;Li Li ,&nbsp;Weilong Cao ,&nbsp;Junsong Wang ,&nbsp;Lihua Zhao ,&nbsp;Yue Pang ,&nbsp;Haoran Li ,&nbsp;Fengdeng Wan ,&nbsp;Min Huang","doi":"10.1016/j.jobe.2025.112733","DOIUrl":"10.1016/j.jobe.2025.112733","url":null,"abstract":"<div><div>Employing regionally adaptive building materials for passive evaporative cooling offers an effective means of reducing building energy consumption. Nevertheless, to align with rapid development needs, the hygrothermal performance and future responsiveness of many historically used materials—already well-suited to local climatic conditions and conducive to more convenient, low-cost construction—remain insufficiently understood. Moreover, direct applications and future predictive indices for retrofitting and evaluating such historical buildings in practice are lacking. To address these two challenges, integrates conventional approaches—including on-site monitoring, material property testing, and numerical simulations—to compare the hygrothermal response of a regionally historic building material, namely yellow sand cladding, against modern commonly used walls. Leveraging this platform, propose an attempt to estimate predictive indices. Research clarifies the relationships among established techniques and introduces comprehensive climate-material reference indices. Results indicate that yellow sand cladding maintains wall humidity within 60–75 % and yields lower internal water content than modern commonly used in each climatic scenario (2023, 2050 and 2080) by 5.86, 5.67, and 5.97 kg/m³, respectively. Other tested indicators are comparable modern wall structures, and the overall hygrothermal responsiveness of yellow sand cladding is even slightly superior. Mould Index (<span><math><mrow><mi>M</mi><mi>o</mi><mi>I</mi></mrow></math></span>) derived from combined climate-material reference indices demonstrates notably different values, indirectly confirming the feasibility of subsequent research efforts. This investigation of regionally adaptive materials’ hygrothermal response and predictive capabilities offers valuable insights for climate-adaptive, energy-efficient buildings and presents a more accurate and rapid methodology for the climate-integrated retrofitting and maintenance of historic structures.</div></div>","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"107 ","pages":"Article 112733"},"PeriodicalIF":6.7,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143868364","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":"Inhibition of sulfate attack on cement-based materials under stray currents and low temperatures by mineral materials","authors":"Zheng Fang ,&nbsp;Chong Wang ,&nbsp;Haoyue Hu ,&nbsp;Zijian Li ,&nbsp;Bo Ran ,&nbsp;Shuai Zhou","doi":"10.1016/j.jobe.2025.112750","DOIUrl":"10.1016/j.jobe.2025.112750","url":null,"abstract":"<div><div>Metro tunnel structures frequently suffer from sulfate attack under stray current conditions at low temperatures, which accelerates concrete degradation through physico-chemical processes. This study investigates the resistance of cement-based materials to such combined degradation, focusing on the effects of mineral admixtures and limestone powder characteristics. Comprehensive experimental methods combining macroscopic testing and microstructural characterization revealed the degradation mechanisms among different cementitious materials. A 6 % silica fume addition lowered the overall porosity from 33.1 % to 27.9 %; combined with its pozzolanic reactivity, this contributed to improved sulfate resistance. By contrast, metakaolin accelerated the formation of expansive products (25.2 % ettringite and 10.0 % thaumasite by mass of the dried degraded sample), resulting in more severe degradation. Increasing limestone powder fineness (387–811 m²/kg) significantly accelerated degradation, particularly in metakaolin-containing systems, leading to 64 % higher strength loss. A correlation between electrical resistivity evolution and phase transformation was established, providing new insights for durability monitoring. These findings advance the understanding of degradation mechanisms and suggest optimal material combinations for enhanced durability in underground metro environments.</div></div>","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"107 ","pages":"Article 112750"},"PeriodicalIF":6.7,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143868373","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":"Reversible multifunctional mural protective material with high durability, anti-aging, breathability, and harsh-environment resistance","authors":"Xiao-Hai Wu ,&nbsp;Xiao-Jian Bai ,&nbsp;Dong-Mei Chen ,&nbsp;Xian-Ming Zhang","doi":"10.1016/j.jobe.2025.112729","DOIUrl":"10.1016/j.jobe.2025.112729","url":null,"abstract":"<div><div>Murals, as irreplaceable cultural heritage, are undergoing accelerated degradation from environmental stressors (thermo-hygrometric fluctuations and salt crystallization), exacerbated by anthropogenic climate change and pollution intensification. There is sustained advocacy by international heritage conservation bodies (ICOMOS/ICCROM) for sustainable mural preservation strategies. Prevailing materials, however, demonstrate enduring durability deficits and interfacial irreversibility, accelerating structural deterioration under environmental stress. To address these challenges, we developed a fluorosilane-modified polyacrylic resin protective material (P(HMT-Si-F)) via multicomponent molecular engineering. P(HMT-Si-F) integrates fluorinated hydrophobes, acrylic hydrophiles, and flexible siloxanes with dynamic non-covalent networks (hydrogen bonds, π-π stacking, and F···F interactions). The engineered P(HMT-Si-F) achieves 100 % reversible recovery, coupled with broad thermal adhesion stability (shear strength range 0.06 MPa, −20 °C–100 °C). Remarkably, the material demonstrates an order-of-magnitude reduction in pigment loss (70.8 % freeze-thaw; 127.3 % salt crystallization) under accelerated aging, outperforming conventional systems through environmental stressor decoupling. The hydrophilic-hydrophobic architecture achieves exceptional moisture resistance (5.8 % uptake) while preserving 91.3 % of the original mural pore structure, thereby resolving the long-standing protection-breathability trade-off. This molecular engineering strategy synergistically enhances moisture barrier efficacy, vapor permeability, and interfacial adhesion through multicomponent coordination, establishing a unified conservation framework for heritage stabilization in hygrothermal/salt-rich environments.</div></div>","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"107 ","pages":"Article 112729"},"PeriodicalIF":6.7,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143878553","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":"Biomass bottom ash in different types of recycled concrete. Mechanical, acoustic and thermal properties","authors":"Julia Rosales ,&nbsp;Manuel Rosales ,&nbsp;Manuel Cabrera ,&nbsp;Antonio Cubero ,&nbsp;Francisco Agrela ,&nbsp;María Dolores Redel","doi":"10.1016/j.jobe.2025.112724","DOIUrl":"10.1016/j.jobe.2025.112724","url":null,"abstract":"<div><div>Due to the global emergency associated with the use of planet Earth's natural resources, the accumulation of waste from human activity and the existence of high noise levels, especially concentrated in large cities, this work focuses on the development of thermally-insulating concrete mixes and noise sinks with recycled materials in their matrix. Two series of concrete mixes were manufactured: series 1 of five self-compacting concrete mixes (SCC) and series 2 of five lightweight concrete mixes (LC) including biomass bottom ash (BBA) with different processing in substitution of fine aggregate.</div><div>A physicochemical characterisation including elemental analysis of the materials was carried out. The concrete series were tested for mechanical performance, durability, thermal conductivity and sound insulation. The self-compacting concrete mixes with fine aggregate and limestone filler substitutions showed a reduction of between 14 % and 40 % of the strength of the long-term control mix. With respect to the lightened concrete series, the strengths of the concrete mixes with recycled materials incurred a drop of between 7 % and 16 % of the mechanical performance of the conventional concrete. The series of lightweight concrete mixes including biomass bottom ash, in terms of acoustic and thermal insulation, performed better than the conventional lightweight concrete mix. This study shows the possibility of applying ash from olive biomass bottom ash to two types of concrete. The use of this by-product leads to improvements in thermal and acoustic insulation properties. Thermal insulation improved by 35 % compared to the insulation of the conventional lightweight concrete mix. The notable improvement in acoustic insulation occurred in the medium and high frequencies, between 1000 Hz and 8000 Hz. The exhaustive study of the thermal and acoustic performance of concrete with recycled materials yielded positive results, demonstrating that the inclusion of bottom ash from biomass slightly decreases the mechanical performance while improving the thermal and acoustic comfort performance.</div></div>","PeriodicalId":15064,"journal":{"name":"Journal of building engineering","volume":"107 ","pages":"Article 112724"},"PeriodicalIF":6.7,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143877244","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}