Materials and Structures最新文献_第3页

Thermal treatment of cementitious waste materials: phase transformations and hydraulic regeneration potential 胶凝废料的热处理：相变和水力再生潜力

IF 3.9 3区工程技术

Materials and Structures Pub Date : 2026-09-28 DOI: 10.1617/s11527-026-03303-1

Abdellatif Abidar, Rabah Hamzaoui, Othmane Bouchenafa, Sandrine Mansoutre, Céline Florence, Laury Barnes Davin, Claire Capra, Bruno Classen

{"title":"Thermal treatment of cementitious waste materials: phase transformations and hydraulic regeneration potential","authors":"Abdellatif Abidar, Rabah Hamzaoui, Othmane Bouchenafa, Sandrine Mansoutre, Céline Florence, Laury Barnes Davin, Claire Capra, Bruno Classen","doi":"10.1617/s11527-026-03303-1","DOIUrl":"10.1617/s11527-026-03303-1","url":null,"abstract":"<div><p>The recovery of hydraulic reactivity from waste cementitious materials offers a promising pathway toward low-carbon binder production and circular concrete technologies. In this study, cement pastes previously hydrated for 28 days were thermally activated between 400 °C and 800 °C. Phase transformations and hydration mechanisms were characterized by X-ray diffraction (XRD), thermogravimetric analysis (TGA), and isothermal microcalorimetry, while microstructural evolution was examined by scanning electron microscopy (SEM). Results identify 600 °C as a critical threshold for the decomposition of C–S–H and the formation of reactive belite polymorphs α′<sub>H</sub>-C<sub>2</sub>S and β-C<sub>2</sub>S. Upon rehydration, these regenerated binders exhibited distinct water demands compared to conventional cement, reflecting the contribution of highly reactive lime formed during the heating process. At 28 days, the consumption of the newly formed belite phases correlates with significant strength development. Mechanical testing shows that these recycled binders achieve compressive strengths above 16 MPa, which increase to over 30 MPa when blended with 40% Portland cement. These findings highlight the viability of thermally regenerated pastes as low energy belitic binders for circular concrete technologies.</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":"149133184","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

Effect of defect in precast grouted sleeve connection 预制注浆套筒接头缺陷的影响

IF 3.9 3区工程技术

Materials and Structures Pub Date : 2026-09-28 DOI: 10.1617/s11527-026-03276-1

Min-Jun Kim, Jang-Hyuk Moon, Min-Hyeok Shin, Seon-Hoon Kim, Won-Jun Lee, Deuckhang Lee

{"title":"Effect of defect in precast grouted sleeve connection","authors":"Min-Jun Kim, Jang-Hyuk Moon, Min-Hyeok Shin, Seon-Hoon Kim, Won-Jun Lee, Deuckhang Lee","doi":"10.1617/s11527-026-03276-1","DOIUrl":"10.1617/s11527-026-03276-1","url":null,"abstract":"<div><p>This study investigates the effects of expected defects and various compressive strengths of grouts on the pull-out behavior of grouted sleeve connections for an emulative mechanically-spliced-reinforcement system in precast concrete joints. Realistic mock-up testing and subsequent uniaxial pull-out tests were conducted. Transparent acrylic sleeves were carefully fabricated for the mock-up field testing to visualize the size and patterns of grout defects, resulting in an average defect ratio of 14.0%, predominantly of a horizontal orientation. Axial tension test results indicated that the maximum pull-out strength decreased with increasing grout defect ratio, whereas it can be compensated with higher grout compressive strength. In addition, it was confirmed that the average bond strength was little sensitive to the compressive strength and defect ratio of grouting materials within the testing range. The influence of eccentricity between connecting bars was also examined, revealing its substantial impact on the stiffness degradation of the grouted sleeve connections. Based on reliable existing bond model, the bond stress coefficient was reversely estimated, and it showed no sensitive to both the grout defect ratio and strength. It seems that the bond stress reductions in grouted sleeve connections due to defect ratio not greater than 20% (<i>κ</i> ≤ 20%) can be compensated by increasing the compressive strength of grout, and thus this study recommends the application of high-strength grouting materials to redeem the negative effect induced by inevitable defect in grout materials.</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":"149133186","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

Textile- and carbon-reinforced concrete in digital fabrication 数字制造中的纺织和碳增强混凝土

IF 3.9 3区工程技术

Materials and Structures Pub Date : 2026-09-25 DOI: 10.1617/s11527-026-03285-0

Iurii Vakaliuk, Steffen Marx, Rostislav Chudoba

{"title":"Textile- and carbon-reinforced concrete in digital fabrication","authors":"Iurii Vakaliuk, Steffen Marx, Rostislav Chudoba","doi":"10.1617/s11527-026-03285-0","DOIUrl":"10.1617/s11527-026-03285-0","url":null,"abstract":"<div><p>Digital fabrication with concrete (DFC) provides several ways to generate structural geometry, but these routes do not provide equivalent conditions for textile- and carbon-reinforced concrete (TRC/CRC). This review retains a coupled two-axis framework: concrete-shaping mechanism is the primary organising axis and reinforcement implementation is the secondary structural axis, while folding, joining and hybrid assembly are treated as supporting transformation strategies. The review compares extrusion, non-planar deposition, robotic spraying, digital casting, removable and stay-in-place digital formwork, flexible formwork, particle-bed processes and injection printing. Reinforcement architecture is treated as a cross-cutting variable distinguishing flexible textiles, stabilized grids, mineral-impregnated rovings and spatial preforms. Two synthesis tables connect the axes and compare matrix penetration, bond, cover and position, accessibility, inspectability, automation, structural evidence, durability, process-chain complexity and environmental performance. The review presents an evidence shows that process-parallel integration can improve strength and deformation while simultaneously creating voids, reduced interlayer contact or difficult internal verification. Near-term structural applications are therefore most credible where shaping, reinforcement placement and consolidation can be inspected separately, whereas fully integrated processes require stronger in-line quality assurance and route-specific structural validation.\u0000</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"59 8","pages":""},"PeriodicalIF":3.9,"publicationDate":"2026-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1617/s11527-026-03285-0.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149035422","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

Magnetorheological properties of calcium aluminate cements 铝酸钙水泥的磁流变特性

IF 3.9 3区工程技术

Materials and Structures Pub Date : 2026-09-24 DOI: 10.1617/s11527-026-03286-z

Mert Yücel Yardimci, Erkan Guler, Dengwu Jiao, Ayten Caputcu, Geert De Schutter

{"title":"Magnetorheological properties of calcium aluminate cements","authors":"Mert Yücel Yardimci, Erkan Guler, Dengwu Jiao, Ayten Caputcu, Geert De Schutter","doi":"10.1617/s11527-026-03286-z","DOIUrl":"10.1617/s11527-026-03286-z","url":null,"abstract":"<div><p>The rheological properties of materials exhibiting magnetorheological (MR) behavior can be controlled on-demand through the application of a magnetic field during flow. Conventional Portland cement (PC) systems require the addition of extra magnetic particles to exhibit MR properties. In contrast, high-iron calcium aluminate cement (HI-CAC) is a binder that naturally exhibits MR properties. This study is the first to investigate the origin of the intrinsic MR properties of HI-CAC by analyzing the mineralogical and microstructural characteristics of its magnetic phases. The MR behavior of HI-CAC pastes with two different water-to-cement (w/c) ratios was assessed using oscillatory and rotational rheometry with a specialized MR device. To characterize its magnetic phases, a sequential magnetic separation was performed, and the bulk-HI-CAC and its separated fractions were analyzed by a vibrating-sample magnetometer (VSM), scanning electron microscopy (SEM), and X-ray diffraction (XRD). Magnetic separation experiments showed that approximately 70% of the bulk HI-CAC responds even at 0.05 T, increasing to around 90% at 0.4 T. XRD and SEM–EDS analyses confirmed that magnetic properties originate from iron-bearing phases within the polymineralic structure of HI-CAC. Rheological tests demonstrated rapid manipulation of the viscoelastic and flow behaviors of HI-CAC pastes by an external magnetic field, indicating clear MR properties. The MR response depends strongly on the applied magnetic field strength and the w/c ratio. Comparisons with published data for PC-based MR mixtures at the same field strengths showed that the MR capacity of HI-CAC was substantially better than that of fly ash and fayalite slag incorporated PCs and comparable to nano-magnetite incorporated PC systems.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"59 8","pages":""},"PeriodicalIF":3.9,"publicationDate":"2026-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149035151","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

Role of local mechanical constraint and confinement in desorption-induced deformation in C–S–H nanopores 局部力学约束和约束在C-S-H纳米孔解吸诱导变形中的作用

IF 3.9 3区工程技术

Materials and Structures Pub Date : 2026-09-24 DOI: 10.1617/s11527-026-03287-y

Ouail Reguieg, Amine Bouibes, Laurie Lacarrière

{"title":"Role of local mechanical constraint and confinement in desorption-induced deformation in C–S–H nanopores","authors":"Ouail Reguieg, Amine Bouibes, Laurie Lacarrière","doi":"10.1617/s11527-026-03287-y","DOIUrl":"10.1617/s11527-026-03287-y","url":null,"abstract":"<div><p>Drying shrinkage in cement-based materials originates from water loss within calcium-silicate-hydrate (C–S–H) gel, yet the governing mechanisms remain difficult to resolve because pore size and local mechanical constraint vary within the gel microstructure. This study investigates how these two factors influence desorption-induced deformation and interparticle sliding resistance in C–S–H nanopores. Hybrid molecular dynamics and grand canonical Monte Carlo simulations were used to follow stepwise drying at 300 K in the C–S–H interlayer and widened pores of 12 and 20 Å under fixed-cell and flexible-cell conditions. Under fixed-cell conditions, water retention decreased with increasing pore size and the pore-normal pressure shifted from compressive to tensile at low humidity, indicating stored contraction-driving pressure. Under flexible-cell conditions, the widened pores contracted progressively toward a near-dry width of about 7 Å, while the pore-normal pressure remained compressive and increased as humidity decreased. Sliding resistance increased sharply in this thin-film regime, linking water-film thinning to loss of lubrication and stronger interparticle coupling. These findings identify local mechanical constraint as an important factor influencing the desorption pathway, pressure state, and cohesion in C–S–H nanopores.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"59 8","pages":""},"PeriodicalIF":3.9,"publicationDate":"2026-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149035146","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

Seismic performance of a hybrid precast bridge pier with prestressing tendons and UHPC-ECC enhanced socketed connection 预应力筋与UHPC-ECC增强嵌套连接混合预制桥墩抗震性能研究

IF 3.9 3区工程技术

Materials and Structures Pub Date : 2026-09-21 DOI: 10.1617/s11527-026-03279-y

Zhanghua Xia, Guohao Chen, Yuanzheng Lin, Youqin Lin

{"title":"Seismic performance of a hybrid precast bridge pier with prestressing tendons and UHPC-ECC enhanced socketed connection","authors":"Zhanghua Xia, Guohao Chen, Yuanzheng Lin, Youqin Lin","doi":"10.1617/s11527-026-03279-y","DOIUrl":"10.1617/s11527-026-03279-y","url":null,"abstract":"<div><p>This study proposes a hybrid precast bridge pier with prestressing tendons and a socketed connection (PS) to improve the seismic performance of bridge piers under strong earthquakes. The prestressing tendons are intended to provide self-centering capability, while an ECC layer is arranged in the socket region. UHPC is used near the pier base to delay severe damage in the plastic-hinge region. Three 1:5-scale specimens were tested under pseudo-dynamic loading, and a finite element model was developed to investigate key connection parameters. The results show that the proposed hybrid pier delayed visible cracking, reduced residual displacement, and promoted a more controllable damage pattern compared with the cast-in-place pier. The UHPC-protected pier base shifted damage away from the pier-footing interface, while the prestressing tendons improved the recentering tendency. Parametric analyses indicate that increasing the socket embedment depth can reduce the pier-top displacement and mitigate damage in the pier shaft. Changes in the ECC width had a minor effect on the global displacement response. Reducing the ECC compressive strength may transfer damage from the pier-shaft concrete to the ECC layer. When the ECC strength was reduced to 10 MPa, the peak pier-top displacement increased by 61% relative to the 30 MPa case, accompanied by severe compressive crushing of the ECC layer. These results reveal a trade-off between damage redistribution and global deformation demand. Although the practical repairability of the crushed ECC layer still requires further verification, the transfer of damage from the plastic hinge region to the ECC layer indicates that this layer has the potential to serve as a sacrificial damage-control zone, and can provide a preliminary reference for subsequent research on post-earthquake repair.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"59 8","pages":""},"PeriodicalIF":3.9,"publicationDate":"2026-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149034552","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

An experimental-analytical investigation of the mechanical behaviour of moment-resisting timber connections using slotted-in steel plates with threaded rods 使用带螺纹杆的开槽钢板的抗弯矩木材连接的力学行为的实验分析研究

IF 3.9 3区工程技术

Materials and Structures Pub Date : 2026-09-21 DOI: 10.1617/s11527-026-03284-1

Elif Appavuravther, Robbe Celis, Dan Dragan, Tine Engelen, Jose Henriques, Bram Vandoren

{"title":"An experimental-analytical investigation of the mechanical behaviour of moment-resisting timber connections using slotted-in steel plates with threaded rods","authors":"Elif Appavuravther, Robbe Celis, Dan Dragan, Tine Engelen, Jose Henriques, Bram Vandoren","doi":"10.1617/s11527-026-03284-1","DOIUrl":"10.1617/s11527-026-03284-1","url":null,"abstract":"<div><p>The use of moment-connections with dowel-type connectors and slotted-in steel plates is becoming an increasingly used solution in mid- to high-rise timber structures. In this paper, the moment capacity and rotational stiffness of such moment connections have been studied through a limited experimental campaign with specimens climatised between 30% and 95% relative humidity (RH). The test specimens were monitored with digital image correlation (DIC) system to determine the changes on the surface displacement, centre of rotation (CoR) and crack propagation. The experimental results reveal a reduction in initial stiffness and ultimate moment capacity with increasing moisture content. The DIC results show the CoR is not at the geometric centre of the dowels, which is a common assumption in the analytical models available in the literature. Analytical predictions from EN 1995–1-1:2025 and literature were evaluated against the experimental data, showing that code-based approaches overestimate rotational stiffness by 35% and moment capacity by 80%. The findings demonstrate that the CoR has a substantial effect on moment connection performance and that existing analytical models require refinement for applications.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"59 8","pages":""},"PeriodicalIF":3.9,"publicationDate":"2026-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149034553","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

Optimizing the performance of hybrid rubber–nanoclay asphalts for low-compatibility nanoclays: a cost-effective strategy via rubber content control 低相容性纳米粘土的混合橡胶-纳米粘土沥青性能优化：通过橡胶含量控制的成本效益策略

IF 3.9 3区工程技术

Materials and Structures Pub Date : 2026-09-18 DOI: 10.1617/s11527-026-03288-x

Federico Ignacio Ortiz de Zárate, Ignacio Zapata Ferrero, Silvina Andrea Regenhardt, Hugo Gerardo Botasso, Hao Chen, Gang Liu, Camilo Ignacio Meyer

{"title":"Optimizing the performance of hybrid rubber–nanoclay asphalts for low-compatibility nanoclays: a cost-effective strategy via rubber content control","authors":"Federico Ignacio Ortiz de Zárate, Ignacio Zapata Ferrero, Silvina Andrea Regenhardt, Hugo Gerardo Botasso, Hao Chen, Gang Liu, Camilo Ignacio Meyer","doi":"10.1617/s11527-026-03288-x","DOIUrl":"10.1617/s11527-026-03288-x","url":null,"abstract":"<div><p>Crumb rubber modified asphalt (CRMA) offers significant advantages for road construction, yet phase separation remains a major barrier to its broader application. Nanoclays have shown potential in improving storage stability; however, balancing performance and cost is still challenging, particularly with low-compatibility nanoclays such as natural clay, which often fail to meet technical requirements. In this study, hybrid rubber–nanoclay modified binders were prepared with two rubber contents (10 wt% and 20 wt%) and nanoclays with varying surfactant loadings. Rheological behavior, short-term aging resistance, storage stability, and morphology were systematically evaluated. Results showed that the effects of nanoclay strongly depend on rubber content. Specifically, while natural clay reduced storage stability and aging resistance at 20 wt% rubber, it improved both properties at 10 wt% rubber. These differences were attributed to greater availability of light asphalt fractions at lower rubber contents, which facilitates nanoclay delamination and rubber swelling. Notably, organoclays with loadings as low as 15 wt% achieved acceptable storability. These findings suggest a cost-effective strategy for improving CRMA storability: by controlling rubber content and optimizing the balance of light fractions, the need for expensive surfactants is reduced, enabling the use of significantly cheaper nanoclay stabilizers. This approach can support broader adoption of sustainable, high-performance pavement technologies in budget-limited contexts and practical field storage conditions.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"59 8","pages":""},"PeriodicalIF":3.9,"publicationDate":"2026-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148987073","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

Structural performance of cement paste cylinders cured in microgravity on the ISS: effects of air-entraining agent and simulated microgravity conditions 国际空间站上微重力固化水泥浆柱的结构性能：引气剂和模拟微重力条件的影响

IF 3.9 3区工程技术

Materials and Structures Pub Date : 2026-09-18 DOI: 10.1617/s11527-026-03265-4

J. T. I. Müller, T. Welsch, B. Rattenbacher, W. Walls, K. Tell, M. Schnellenbach-Held, M. Sperl

{"title":"Structural performance of cement paste cylinders cured in microgravity on the ISS: effects of air-entraining agent and simulated microgravity conditions","authors":"J. T. I. Müller, T. Welsch, B. Rattenbacher, W. Walls, K. Tell, M. Schnellenbach-Held, M. Sperl","doi":"10.1617/s11527-026-03265-4","DOIUrl":"10.1617/s11527-026-03265-4","url":null,"abstract":"<div><p>As humanity looks to the stars for future colonies, mastering the science of construction in space begins with a deep understanding of how materials perform in extraterrestrial environment. This study pioneers investigations of microgravity effects on cement paste bulk properties. Samples, produced in defined cylindrical shapes on the International Space Station (ISS), allowed for the first-time determination of macroscopic compressive strengths of microgravity samples. A thorough analysis revealed significant impacts on composition, density, and porosity, with compressive strength (− 19%) and Young’s modulus (− 5.5%) lowered due to increased overall porosity (+ 12.3%). Unexpectedly, the addition of an air-entraining agent resulted in lower overall porosity (− 8.7%) and higher compressive strength (+ 18.6%) in microgravity samples as compared to normal gravity (g) on earth. While this effect was consistent across the tests, the underlying cause remains unresolved. Ground-based microgravity simulators like the clinostat and the random positioning machine partially replicated microgravity effects, revealing the challenges of simulating actual microgravity. Achieving homogeneity and preventing large air voids require optimization of the manufacturing-concrete mixing processes, but nevertheless the findings underscore the feasibility of high-quality concrete production in microgravity.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"59 8","pages":""},"PeriodicalIF":3.9,"publicationDate":"2026-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1617/s11527-026-03265-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148987074","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

Development of phosphogypsum foamed concrete with optimized phosphogypsum content and bulk density: mechanical performance, durability, and sustainability 磷石膏泡沫混凝土的发展与优化磷石膏含量和体积密度：机械性能，耐久性和可持续性

IF 3.9 3区工程技术

Materials and Structures Pub Date : 2026-09-17 DOI: 10.1617/s11527-026-03271-6

Ke Wang, Jingruo Li, Lihong He, Ruiquan Liu, Xin Cao, Chuhua Xiong, Li Fan, Bosheng Zhou

{"title":"Development of phosphogypsum foamed concrete with optimized phosphogypsum content and bulk density: mechanical performance, durability, and sustainability","authors":"Ke Wang, Jingruo Li, Lihong He, Ruiquan Liu, Xin Cao, Chuhua Xiong, Li Fan, Bosheng Zhou","doi":"10.1617/s11527-026-03271-6","DOIUrl":"10.1617/s11527-026-03271-6","url":null,"abstract":"<div><p>To promote the resource utilization of phosphogypsum (PG), phosphogypsum-based foamed concrete (PGFC) with high PG utilization was developed using PG, ground granulated blast-furnace slag (GGBS), and a small amount of ordinary Portland cement (OPC) through synergistic activation. The effects of PG content and bulk density on the properties and durability of PGFC were investigated. Mechanical, physical, and durability tests were conducted, while MIP, XRD, FTIR, isothermal calorimetry, and SEM-EDS were used to analyze the pore structure, hydration behavior, and microstructure. The results showed that the compressive strength of PGFC decreased with increasing PG content but increased with bulk density. When the PG content was 40%–50% and the bulk density was not lower than 800 kg/m<sup>3</sup>, the 28d compressive strength reached 0.928–1.947 MPa, satisfying the strength requirement for roadbed filling materials. The main hydration products were AFt, C–S–H gel, and gypsum. Increasing PG content reduced the hydration rate and AFt formation, while increasing bulk density decreased porosity but increased the pore fractal dimension. Under severe wet-dry and freeze-thaw cycles, PGFC with a bulk density of 800 kg/m<sup>3</sup> maintained both wet-dry and freeze-thaw strength retention coefficients above 0.8 at PG contents of 40%–50%. In addition, toxic leaching met the limits of GB 8978-1996, and PGFC showed lower carbon emissions and production cost than OPC-based foamed concrete.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"59 8","pages":""},"PeriodicalIF":3.9,"publicationDate":"2026-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148986837","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