Materials and Structures最新文献_第2页

Skim milk powder as a urease stabilizer for efficient EICP treatment of recycled concrete aggregates 脱脂奶粉作为脲酶稳定剂用于高效EICP处理再生混凝土集料

IF 3.9 3区工程技术

Materials and Structures Pub Date : 2026-10-07 DOI: 10.1617/s11527-026-03290-3

Rui Zhang, Aowei Ma, Dezhi Xie, Jianyun Wang

{"title":"Skim milk powder as a urease stabilizer for efficient EICP treatment of recycled concrete aggregates","authors":"Rui Zhang, Aowei Ma, Dezhi Xie, Jianyun Wang","doi":"10.1617/s11527-026-03290-3","DOIUrl":"10.1617/s11527-026-03290-3","url":null,"abstract":"<div><p>The use of recycled concrete aggregate (RCA) in concrete is constrained by porous adhered mortar and defects inherited from demolition and crushing. This study evaluated skim milk powder as a stabilizing additive for enzyme-induced carbonate precipitation (EICP) treatment of RCA. The effects of milk-powder addition sequence and concentration (0–8 g/L) were examined in triplicate by monitoring pH and dissolved Ca<sup>2</sup>⁺, urea decomposition, dry mass gain, mass loss after a fixed ultrasonic-detachment test, water absorption, and deposit morphology and elemental composition by SEM/EDS. Adding milk powder after urease (U-M) or premixing milk powder with urease (UM) produced final Ca<sup>2</sup>⁺ utilization values of 87.2% and 88.4%, respectively. A dosage of 4 g/L was selected as a practical working concentration because higher dosages provided no clear additional benefit across the measured responses. Under the tested conditions, the largest reduction in RCA water absorption was 41.4%, compared with 17.1% for urease without milk powder. SEM/EDS observations were consistent with a finer and denser organic-mineral deposit in the milk-containing treatment. These results demonstrate the effectiveness of milk-powder-assisted EICP for improving pore-related RCA properties.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"59 9","pages":""},"PeriodicalIF":3.9,"publicationDate":"2026-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149099158","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mechanical characteristics of stabilized compressed earth brick masonry elements: experimental and detailed micro-modeling 稳定压缩土砖砌体构件的力学特性：实验和详细的微观模拟

IF 3.9 3区工程技术

Materials and Structures Pub Date : 2026-10-06 DOI: 10.1617/s11527-026-03305-z

Simon-Pierre Joy Salassi, Philbert Nshimiyimana, Decroly Denouwe Djoubissie, Adamah Messan, Luc Courard

{"title":"Mechanical characteristics of stabilized compressed earth brick masonry elements: experimental and detailed micro-modeling","authors":"Simon-Pierre Joy Salassi, Philbert Nshimiyimana, Decroly Denouwe Djoubissie, Adamah Messan, Luc Courard","doi":"10.1617/s11527-026-03305-z","DOIUrl":"10.1617/s11527-026-03305-z","url":null,"abstract":"<div><p>Using earth in Compressed Earth Brick (CEB) is one of the major ways to reduce the environmental impact of the building construction sector. However, its widespread adoption as a load-bearing wall material is hindered by a lack of consensus regarding the characterization of its elements. The objective of this study was to experimentally characterize stabilized CEB masonry elements and propose a numerical model to evaluate the mechanical behaviour of this masonry. Prismatic specimens of CEB and mortar were subjected to direct tensile and compressive tests. The behavior of the brick-mortar interface was also characterized by push-out and tensile tests. These experimental characterizations were numerically simulated using <i>DIANA FEA</i> software. The “<i>Total Crack Strain Model</i>” (for brick and mortar) and <i>Coulomb Friction Model</i> (for the interface) faithfully reproduced the failure modes and characteristic parameters of the elements. A 2D detailed micromodel of a masonry wall was simulated in unconfined compression and revealed good accuracy with the experimental test. This study demonstrates the relevance of some test setups for the characterization of CEB masonry elements. It provides robust characterization data for CEB masonry elements and establishes key recommendations for reliable numerical modeling.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"59 9","pages":""},"PeriodicalIF":3.9,"publicationDate":"2026-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149098370","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impact of iron (Fe) phases on the reactivity of calcined clays under reductive conditions 还原性条件下铁（Fe）相对煅烧粘土反应性的影响

IF 3.9 3区工程技术

Materials and Structures Pub Date : 2026-10-06 DOI: 10.1617/s11527-026-03300-4

Karina Duverger-Escobar, Tafadzwa Ronald Muzenda, Fabien Georget, Adrián Alujas-Díaz, Roger Samuel Almenares-Reyes, Juan Alberto Ribalta-Quesada, Laurent Izoret, Sébastien Diliberto, Thomas Matschei, José Fernando Martirena-Hernández

{"title":"Impact of iron (Fe) phases on the reactivity of calcined clays under reductive conditions","authors":"Karina Duverger-Escobar, Tafadzwa Ronald Muzenda, Fabien Georget, Adrián Alujas-Díaz, Roger Samuel Almenares-Reyes, Juan Alberto Ribalta-Quesada, Laurent Izoret, Sébastien Diliberto, Thomas Matschei, José Fernando Martirena-Hernández","doi":"10.1617/s11527-026-03300-4","DOIUrl":"10.1617/s11527-026-03300-4","url":null,"abstract":"<div><p>Most kaolinitic clays have accompanying minerals such as iron (Fe) phases that impact the color of the material before and after calcination. The pinkish color in the calcined product, resulting after the formation of the phase Hematite, changes the color of the resulting cement. The industry is reluctant to produce a cement with a color other than gray, thus color control techniques need to be implemented. The most common approach to control color is to carry out cooling under reductive conditions to favor the formation of the dark color Fe phase magnetite. This paper evaluates the properties of three different clays with varying Fe<sub>2</sub>O<sub>3</sub> content, which have been cooled under reductive conditions. Results prove that for Fe<sub>2</sub>O<sub>3</sub> content around 20% (sample C2), there is a significant drop in specific surface that leads to a poorer reactivity of the calcined product. Mineralogical studies confirm the formation of a new spinel phase, hercynite, which is dark in color. This phase apparently immobilizes part of the alumina of the system and thus cripples the amount of reactive alumina in cement. Mössbauer tests were done to study both valence and the coordination of iron on the product under different cooling regimes. The cooling process under neutral/reducing conditions induces iron reduction from Fe<sup>3+</sup> to Fe<sup>2+</sup> state, which impact material coloration. The contribution of hematite is considerably reduced, and ferrous oxide (Fe<sup>2+</sup>) contributions clearly appear under 3 distinct crystallographic environments. Strength results of cement pastes confirm the loss of reactivity of the calcined material.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"59 9","pages":""},"PeriodicalIF":3.9,"publicationDate":"2026-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149098373","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Life‑cycle analysis of bio‑based phase change materials in recycled‑aggregate mortars: sourcing sensitivity and trade‑offs 再生骨料砂浆中生物基相变材料的生命周期分析：来源敏感性和权衡

IF 3.9 3区工程技术

Materials and Structures Pub Date : 2026-10-04 DOI: 10.1617/s11527-026-03301-3

Hala Salhab, Luciano Sambataro, Antonio Caggiano, Sergio Nardini, Vincenzo Bianco

{"title":"Life‑cycle analysis of bio‑based phase change materials in recycled‑aggregate mortars: sourcing sensitivity and trade‑offs","authors":"Hala Salhab, Luciano Sambataro, Antonio Caggiano, Sergio Nardini, Vincenzo Bianco","doi":"10.1617/s11527-026-03301-3","DOIUrl":"10.1617/s11527-026-03301-3","url":null,"abstract":"<div><p>The decarbonization of construction materials requires circular design strategies supported by life‑cycle thinking. This study quantifies the cradle‑to‑gate (A1–A3) environmental impacts of three mortar formulations: (i) a Reference mortar, (ii) a mortar incorporating recycled wood aggregates, and (iii) a hybrid mortar in which recycled wood aggregates are impregnated with a bio‑based phase change material to provide latent‑heat storage functionality. A Life Cycle Assessment compliant with ISO 14044 and EN 15804 was implemented in SimaPro using Ecoinvent, focusing on fossil embodied greenhouse-gas emissions (IPCC GWP100a) and total Cumulative Energy Demand (CED). For a performance-related material-scale comparison, results were additionally normalized by volumetric thermal capacity. Because a dedicated inventory for the commercial bio‑based phase change material (PureTemp 25) is not publicly available, a scenario‑based sensitivity analysis was performed using four alternative feedstock proxies (coconut, palm, palm kernel, and Reference mortar has the lowest GWP soybean). Each feedstock was modeled separately, and the unweighted arithmetic mean of the four scenario results was used as a representative central estimate; this value does not represent a physical or equal-proportion mixture of oils. On this basis, replacing conventional constituents with recycled alternatives reduced impacts substantially, reaching up to 82% lower IPCC GWP and 36% lower CED for the hybrid mortar compared with the conventional reference. Feedstock choice strongly influenced trade‑offs, particularly land use and water consumption, highlighting the importance of responsible sourcing for bio‑based components. The results provide decision‑support evidence for the sustainable design of circular, functionality‑enhanced building materials.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"59 9","pages":""},"PeriodicalIF":3.9,"publicationDate":"2026-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1617/s11527-026-03301-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149098455","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mechanical and microstructural properties of pre-treated incinerator bottom ash as fly ash replacement in alkali-activated materials 焚烧炉底灰在碱活性材料中替代粉煤灰的力学和微观结构性能

IF 3.9 3区工程技术

Materials and Structures Pub Date : 2026-10-03 DOI: 10.1617/s11527-026-03289-w

Muhammad Riaz Ahmad, Ahmed Mohamed Abbass, Jian-Guo Dai, Zhen Leng, Yanshuai Wang

{"title":"Mechanical and microstructural properties of pre-treated incinerator bottom ash as fly ash replacement in alkali-activated materials","authors":"Muhammad Riaz Ahmad, Ahmed Mohamed Abbass, Jian-Guo Dai, Zhen Leng, Yanshuai Wang","doi":"10.1617/s11527-026-03289-w","DOIUrl":"10.1617/s11527-026-03289-w","url":null,"abstract":"<div><p>The search for sustainable alternatives to ordinary Portland cement has intensified interest in alkali-activated materials (AAMs), yet the supply of conventional precursors like fly ash is declining. This study addresses this challenge by successfully transforming municipal solid waste incinerator bottom ash (IBA), a problematic residue, into a valuable resource through a simple water immersion treatment. The effect of untreated and treated (10–40% FA replacement) on reaction kinetics, strength development, and microstructural evolution was investigated using isothermal calorimetry, MIP, XRD, TG/DTG, FTIR, and SEM–EDS. The 10-day pretreatment effectively removes soluble chlorides (‑88%) and oxidizes residual metallic aluminum (−96.9 wt.%), mitigating the deleterious expansion and alkali consumption that typically hinder IBA’s use. Results show that untreated IBA has higher total porosity (15–30%), compromised reaction kinetics, and reduced 28-day compressive strength (nearly 50% at 40 wt.% replacement). In contrast, water treated IBA (WTIBA) mixtures exhibit superior microstructure, modified aluminosilicate gel composition (lower Si/Ca and higher Si/Al) and maintain superior compressive strengths at similar replacement level. This work demonstrates a promising processing route for upcycling IBA, enabling up to 20% fly ash replacement without compromising 28-day compressive strength in alkali-activated materials.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"59 9","pages":""},"PeriodicalIF":3.9,"publicationDate":"2026-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1617/s11527-026-03289-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149098104","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Composite strengthening approach using UHPC and embedded steel rebars for RC T-beams under cyclic loading 循环荷载作用下混凝土t梁UHPC与预埋钢筋复合加固方法

IF 3.9 3区工程技术

Materials and Structures Pub Date : 2026-09-30 DOI: 10.1617/s11527-026-03297-w

Laurencius Nugroho, Yanuar Haryanto, Hsuan-Teh Hu, Fu-Pei Hsiao, Anggun Tri Atmajayanti, Stefanus Adi Kristiawan, Senot Sangadji, Januarti Jaya Ekaputri

{"title":"Composite strengthening approach using UHPC and embedded steel rebars for RC T-beams under cyclic loading","authors":"Laurencius Nugroho, Yanuar Haryanto, Hsuan-Teh Hu, Fu-Pei Hsiao, Anggun Tri Atmajayanti, Stefanus Adi Kristiawan, Senot Sangadji, Januarti Jaya Ekaputri","doi":"10.1617/s11527-026-03297-w","DOIUrl":"10.1617/s11527-026-03297-w","url":null,"abstract":"<div><p>Ultra-high-performance concrete (UHPC) possesses a dense matrix and fiber-bridging action that make it a promising material for retrofitting reinforced concrete (RC) members exposed to seismic demands. This study examined the reversed-cyclic response of RC T-beams strengthened in the negative-moment zone using a 40 mm UHPC overlay incorporating embedded steel rebars. One unstrengthened control beam (UB-C) and two strengthened beams (SB-U13-C and SB-U16-C) were tested under reversed cyclic loading to investigate hysteretic behavior, stiffness evolution, strength degradation, residual response, and energy dissipation. The UHPC-strengthened beams exhibited fuller hysteresis loops, improved crack control, and substantially enhanced stiffness and load-carrying capacity, achieving peak load increases of 89% and 96% relative to the control specimen. Although ductility was slightly reduced due to increased initial stiffness and localized compression damage, both strengthened beams maintained degradation coefficients above 0.9, indicating stable cyclic performance. The UHPC overlay also improved residual force retention and significantly increased cumulative energy dissipation, with SB-U13-C exhibiting the highest enhancement. Embedded rebar size had a limited effect on the global peak response but influenced strain redistribution, damage localization, and the balance between strength enhancement and deformation capacity. These findings demonstrated the effectiveness of steel-reinforced UHPC overlays while clarifying the cyclic performance trade-offs of RC T-beams strengthened in negative-moment regions.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"59 8","pages":""},"PeriodicalIF":3.9,"publicationDate":"2026-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149133105","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Performance of sustainable 3D printed binary mixes subjected to carbonation induced corrosion environment 可持续3D打印二元混合物在碳化腐蚀环境下的性能

IF 3.9 3区工程技术

Materials and Structures Pub Date : 2026-09-30 DOI: 10.1617/s11527-026-03304-0

Zinnia Kaur, Shweta Goyal, Naveen Kwatra, Tarun Kumar Bera

{"title":"Performance of sustainable 3D printed binary mixes subjected to carbonation induced corrosion environment","authors":"Zinnia Kaur, Shweta Goyal, Naveen Kwatra, Tarun Kumar Bera","doi":"10.1617/s11527-026-03304-0","DOIUrl":"10.1617/s11527-026-03304-0","url":null,"abstract":"<div><p>Concrete 3D printing is emerging as a transformative approach in construction, providing rapid execution and unparalleled geometric flexibility. To practically apply this technology in load-bearing structural elements, reinforcement integration is crucial, which aggravates its vulnerability towards corrosion. Additionally, high binder content in printable mixes necessitates use of supplementary cementitious materials (SCMs), which makes the corrosion performance under carbonation conditions even more critical. Therefore, this investigation aims to evaluate carbonation induced corrosion behaviour of 3D printed concrete (3DPC) mixes having limestone calcined clay cement (LC2) and fly ash (FA) as alternative binders and further compare it with conventional mould-cast (MC) concrete. For this, migration characteristics in concrete and electrochemical parameters in reinforced concrete are examined followed by evaluation of corrosion mitigation by using a corrosion inhibitor. Carbonation depth surpassed the concrete cover in LC2 concrete and initiated corrosion at around 18–22 weeks, while FA concrete persisted in the passive state throughout the exposure attributed to the formation of denser matrix in FA mix. This indicated that concrete composition and type of SCM was crucial in influencing the corrosion performance. Extrusion of concrete under pressure led to densification of deposited layers which reduced CO<sub>2</sub> ingress and improved corrosion resistance in 3DPC, yielding an estimated extension of approximately 10 years in service life of 3DPC as compared to MC concrete. Inhibitor mitigated corrosion through the combined effect of pore blocking and protective film formation on steel surface which helped in increasing the expected lifespan by about 20 years under natural carbonation conditions.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"59 8","pages":""},"PeriodicalIF":3.9,"publicationDate":"2026-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149133389","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Valorization of river–lake-reservoir dredged sediments as green materials for sustainable construction: solidification methods, mechanisms, mechanical properties, and future prospects 河流、湖泊、水库疏浚沉积物作为可持续建筑绿色材料的固化：固化方法、机理、力学性能及未来展望

IF 3.9 3区工程技术

Materials and Structures Pub Date : 2026-09-29 DOI: 10.1617/s11527-026-03302-2

Xuanxuan Chu, Wenjun Zhang, Fengyuan Guo, Hongjian Cai, Chengchao Guo, Fuming Wang

{"title":"Valorization of river–lake-reservoir dredged sediments as green materials for sustainable construction: solidification methods, mechanisms, mechanical properties, and future prospects","authors":"Xuanxuan Chu, Wenjun Zhang, Fengyuan Guo, Hongjian Cai, Chengchao Guo, Fuming Wang","doi":"10.1617/s11527-026-03302-2","DOIUrl":"10.1617/s11527-026-03302-2","url":null,"abstract":"<div><p>Dredged sediments (DS) from watersheds will continue to accumulate only using traditional disposal methods, easily causing sedimentation and secondary pollution. Therefore, it is necessary to effectively solidify DS as alternative green building materials to enhance sustainable construction. Through systematic literature analysis, this review examines the research progress on DS solidification, covering solidifying agent types, mechanisms, and applications. The mechanisms of physical, chemical, biological, and composite solidification are analyzed. The mechanical properties of solidified DS and its influencing factors are explored with UCS ranging from 0.46 to 17 MPa. The fields of using DS are summarized, focusing on green building materials. Furthermore, permeable polyurethane shows potential for DS solidification but requires verification. Current limitations include insufficient long-term durability data and field validation. Future research should focus on developing greener and more efficient solidifying agents, strengthening long-term performance research, incorporating life cycle assessment, and advancing intelligent solidification. This study can facilitate the extensive valorization of DS for sustainable construction.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"59 8","pages":""},"PeriodicalIF":3.9,"publicationDate":"2026-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149133359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Long-term performance of asphalt pavements with PMB: rutting resistance and base layer effects PMB沥青路面的长期性能：抗车辙性能和基层效应

IF 3.9 3区工程技术

Materials and Structures Pub Date : 2026-09-29 DOI: 10.1617/s11527-026-03296-x

Rita Kleizienė, Adam Zofka, Audrius Vaitkus

{"title":"Long-term performance of asphalt pavements with PMB: rutting resistance and base layer effects","authors":"Rita Kleizienė, Adam Zofka, Audrius Vaitkus","doi":"10.1617/s11527-026-03296-x","DOIUrl":"10.1617/s11527-026-03296-x","url":null,"abstract":"<div><p>While polymer-modified bitumen (PMB) is widely used to combat pavement distress, empirical evidence of their efficacy over a full-service life remains limited. This study evaluates the long-term performance of asphalt pavements with polymer-modified bitumen (PMB) and investigates the influence of base layer materials on pavement rutting and bearing capacity under real traffic conditions. Despite advances in binder modification, long-term field evidence of its effect on structural rutting and bearing capacity under real traffic and climatic loading remains limited, particularly for northern European conditions. Data from the 16-year monitoring period (2008–2024) of in-service operation of the Lithuanian Test Road of Experimental Pavement Sections (REPS) were analysed. Four pavement sections containing asphalt layers made with PMB and conventional asphalt using performance-grade (PG) bitumen, as well as five sections with different unbound base materials, were assessed. Rutting progression and bearing capacity indicators—Base Damage Index (BDI), and Structural Number (SN) -were determined from long-term measurements. Statistical analyses (t-test, Kruskal–Wallis) were used to assess the significance of observed differences between structures. Pavements combining a stone-mastic asphalt (SMA) surface layer with PMB showed a 31.4% reduction in mean rut depth compared to unmodified sections after 16 years; a controlled comparison among sections with identical mixture type isolated a rut depth reduction of approximately 40% attributable to polymer modification alone. Bearing capacity indicators showed no significant dependence on binder type but were strongly influenced by base layer stiffness. Base layers composed of crushed granite, granite–sand mix, or dolomite exhibited equivalent structural performance when optimal compaction was achieved.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"59 8","pages":""},"PeriodicalIF":3.9,"publicationDate":"2026-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149133358","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Balancing structural capacity and sustainability in composite Bamboo shear walls: effects of cement and earth plaster on overturning performance and carbon emissions 竹材复合剪力墙的结构能力和可持续性平衡：水泥和灰泥对倾覆性能和碳排放的影响

IF 3.9 3区工程技术

Materials and Structures Pub Date : 2026-09-28 DOI: 10.1617/s11527-026-03299-8

Carmencita B. Bibal, Luis Felipe Lopez, Marla Kohli, Edwin Zea Escamilla, Gilford B. Estores, Guillaume Habert, Nischal P. N. Pradhan

{"title":"Balancing structural capacity and sustainability in composite Bamboo shear walls: effects of cement and earth plaster on overturning performance and carbon emissions","authors":"Carmencita B. Bibal, Luis Felipe Lopez, Marla Kohli, Edwin Zea Escamilla, Gilford B. Estores, Guillaume Habert, Nischal P. N. Pradhan","doi":"10.1617/s11527-026-03299-8","DOIUrl":"10.1617/s11527-026-03299-8","url":null,"abstract":"<div><p>This study investigated the overturning and environmental performance of composite bamboo shear wall panels constructed from <i>Bambusa blumeana</i> bamboo poles, with emphasis on the influence of the cladding. Three cladding systems, i.e. (a) cement plaster on rib lath matrix, (b) cement plaster on flattened bamboo matrix, and (c) earth plaster on flattened bamboo matrix, were examined and compared against a bare-frame panel without plaster. Structural performance was assessed in terms of maximum overturning capacity following ISO 21581:2010 Method II, while environmental performance was quantified through life cycle assessment. The results showed that cement plaster was critical in mobilizing the nailed frame to cladding connections. In turn, the cement plastered panels achieved the highest overturning resistance, with the flattened bamboo matrix configuration reaching the greatest capacity under monotonic loading. Under cyclic loading, the difference between the two cement-plastered configurations was reduced. Although earth-plastered panels achieved the lowest carbon emissions and highest biogenic carbon storage, they showed lower overturning resistance, due to excessive plaster cracking and inability to fully mobilize the nailed frame to cladding connections. Overall, among the examined specimens, the cement plastered flattened bamboo panels offered the most balanced solution, combining the highest structural capacity with moderate emissions and substantial biogenic carbon storage. The findings identify cladding selection as a key design variable for achieving structurally efficient and environmentally sustainable composite bamboo shear walls. The study provides baseline evidence that could support the improvement of existing standards and the development of new design provisions for composite bamboo shear wall systems.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"59 8","pages":""},"PeriodicalIF":3.9,"publicationDate":"2026-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149133183","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0