Materials and Structures最新文献_第2页

Effect of simulated weathering conditions on the NOX and SOX removal rates of permeable concrete blocks with porous materials 模拟风化条件对多孔材料透水混凝土砌块NOX和SOX去除率的影响

IF 3.4 3区工程技术

Materials and Structures Pub Date : 2025-04-28 DOI: 10.1617/s11527-025-02653-6

Jae-Il Sim, Ju-Hyun Mun, Keun-Hyeok Yang, Jong-Won Kim, Yeon-Back Jung, Se-Jin Choi, Cong Thang Nguyen

{"title":"Effect of simulated weathering conditions on the NOX and SOX removal rates of permeable concrete blocks with porous materials","authors":"Jae-Il Sim, Ju-Hyun Mun, Keun-Hyeok Yang, Jong-Won Kim, Yeon-Back Jung, Se-Jin Choi, Cong Thang Nguyen","doi":"10.1617/s11527-025-02653-6","DOIUrl":"10.1617/s11527-025-02653-6","url":null,"abstract":"<div><p>This study examined the effects of simulated weathering conditions on the NO<sub><i>X</i></sub> and SO<sub><i>X</i></sub> removal rates of permeable concrete blocks with embedded porous materials. To provide NO<sub><i>X</i></sub> and SO<sub><i>X</i></sub> removal, titanium oxide (TiO<sub>2</sub>) nanoparticles or coconut shell carbon (CS) powders and zeolite beads (ZB) were embedded in permeable concrete blocks during their production. Permeable concrete blocks were produced with different embedding ratios of TiO<sub>2</sub> nanoparticles or CS powders using an actual factory production line of Company C in Korea. Leaching, freeze–thawing, and high and low temperatures were applied to each block to simulate weathering conditions. Test results reveal that the specimens with a 5% TiO<sub>2</sub> nanoparticle embedding ratio experienced reductions in NO<sub><i>X</i></sub> and SO<sub><i>X</i></sub> removal rates of approximately 17.7% and 19.5% respectively, after exposure to 10 leaching cycles and 300 freeze–thawing cycles, compared to unexposed specimens. However, the values were not affected by the high or low temperatures and remained similar to those of the unexposed specimens. In particular, the NO<sub><i>X</i></sub> and SO<sub><i>X</i></sub> removal rates of the specimens with a 5% CS powder embedding ratio exceeded 25.8% and 97.5%, respectively, and maintained similar values after exposure to leaching, freeze–thawing, and high- and low-temperature weathering conditions. Considering that TiO<sub>2</sub> nanoparticles can only be removed in an environment with ultraviolet light and NO<sub><i>X</i></sub> removal rates were reduced in water environments, such as leaching and freeze–thawing, CS powders and ZB are promising materials for the stable reduction of NO<sub><i>X</i></sub> and SO<sub><i>X</i></sub> even in external weathering conditions.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"58 4","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143883665","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

Direct aqueous carbonation of electric arc furnace slag: process optimisation through experimental design 电弧炉渣直接水碳酸化：通过实验设计优化工艺

IF 3.4 3区工程技术

Materials and Structures Pub Date : 2025-04-26 DOI: 10.1617/s11527-025-02661-6

Francesca Bonfante, Giuseppe Ferrara, Pedro Humbert, Davide Garufi, Jean-Marc Tulliani, Paola Palmero

{"title":"Direct aqueous carbonation of electric arc furnace slag: process optimisation through experimental design","authors":"Francesca Bonfante, Giuseppe Ferrara, Pedro Humbert, Davide Garufi, Jean-Marc Tulliani, Paola Palmero","doi":"10.1617/s11527-025-02661-6","DOIUrl":"10.1617/s11527-025-02661-6","url":null,"abstract":"<div><p>At present, one of the strategies to reduce the embodied carbon of cement is to partly replace clinker with metallurgical slags. In this perspective, this study investigates the accelerated aqueous carbonation of electric arc furnace slag as possible treatment for its reuse in the cement industry. In view of developing a low-energy and industrially integrated process, mild carbonation conditions were selected: ambient pressure, low liquid-to-solid ratio, minimised temperature (between 20 °C and 60 °C) and short duration time (ranging from 20 to 60 min). To optimise the carbonation process, a design of experiments was developed. The Response Surface Methodology showed a non-representative trend along time. Therefore, a non-linear model was adopted for a better prediction of CO<sub>2</sub> content above 50 min. The results were satisfactory with an optimum CO<sub>2</sub> uptake of 7.7% and the carbonation degree obtained, 30.2%, was the highest registered in previous literature for open systems. Moreover, a literature analysis on previous aqueous and wet direct carbonation of Electric Arc Furnace slag was carried out using Principal Component analysis. This exploratory data analysis identified the most effective carbonation parameters based on the reactor type and suggested the investigation of further parameters such as liquid-to-solid ratio and CO<sub>2</sub> flow rate and partial pressure, maintaining the perspective of a sustainable process.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"58 4","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1617/s11527-025-02661-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143877777","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

Design method for aggregate gradation of porous asphalt mixture based on target air voids 基于目标空隙的多孔沥青混合料级配设计方法

IF 3.4 3区工程技术

Materials and Structures Pub Date : 2025-04-25 DOI: 10.1617/s11527-025-02668-z

Weidong Cao, Chuanyi Ma, Xiudong Zhang, Jingchen Li, Yingjian Li, Zunhao Zhan

{"title":"Design method for aggregate gradation of porous asphalt mixture based on target air voids","authors":"Weidong Cao, Chuanyi Ma, Xiudong Zhang, Jingchen Li, Yingjian Li, Zunhao Zhan","doi":"10.1617/s11527-025-02668-z","DOIUrl":"10.1617/s11527-025-02668-z","url":null,"abstract":"<div><p>The air voids is a critical indicator in the design of porous asphalt mixture (PA). Currently, aggregate gradation design for PA uses air voids solely as a verification indicator, rather than integrating it directly into the gradation design process, which may lead to PA design tedious and time-consuming. The objective of this study was to present a method for designing the aggregate gradation of PA based on the target air voids. Initially, using the volume composition of compacted asphalt mixtures and the formula for estimating asphalt-aggregate ratio, a physical model was established to link air voids with the content of fine materials (i.e. passing percentage of key sieves). Subsequently, a determination method for the critical parameter of the percentage voids in coarse aggregate (VCA) within the physical model was provided based on the skeleton stability of coarse aggregate using a penetration test. Finally, a procedure for designing the aggregate gradation of PA based on target air voids was proposed employing the established physical model. Additionally, an applied case study on the gradation design of PA-13 was presented, verifying the effectiveness of the method. The design method proposed in the paper can serve as a reference for aggregate gradation design of PAs with various requirements for air voids, significantly reducing the experimental workloads and time.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"58 4","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143875452","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

Investigating the fatigue life of asphalt pavements under different aging levels using the three-point bending cylinder (3PBC) test and mechanistic-empirical analysis 采用三点弯曲圆柱体（3PBC）试验和力学-经验分析方法研究了不同老化水平下沥青路面的疲劳寿命

IF 3.4 3区工程技术

Materials and Structures Pub Date : 2025-04-25 DOI: 10.1617/s11527-025-02659-0

Aksel Seitllari

{"title":"Investigating the fatigue life of asphalt pavements under different aging levels using the three-point bending cylinder (3PBC) test and mechanistic-empirical analysis","authors":"Aksel Seitllari","doi":"10.1617/s11527-025-02659-0","DOIUrl":"10.1617/s11527-025-02659-0","url":null,"abstract":"<div><p>Accurate evaluation and prediction of fatigue performance are crucial for extending the service life of asphalt pavements. Asphalt materials exhibit complex behavior influenced by varying temperatures and loading conditions, with aging being a key factor in the early deterioration of pavement structures. Alongside aging, mix design factors, individually or combined, also play a significant role in the fatigue cracking performance of bituminous mixtures. Despite recent advances, the complex relationship between aging and mix design factors affecting asphalt pavement fatigue performance remains not fully understood. Additionally, a standardized testing procedure has yet to be established. This research investigates the impact of aging on the fatigue resistance and long-term performance of three dense-graded asphalt mixtures while also considering the influence of mix design variables. To assess fatigue performance, the recently developed ASTM D8458-22 three-point bending cylinder test in conjunction with the viscoelastic continuum damage model was employed. The study further incorporates mechanistic-empirical analyses to forecast the long-term behavior of three distinct pavement designs under various aging scenarios. The results indicate a clear correlation between aging duration and the decline in fatigue performance of asphalt mixtures. Several critical mix design factors, including aggregate gradation, binder content, and performance grade, significantly influence the rate of aging. Additionally, the mechanistic-empirical analysis reveals an interesting difference in the effects of aging. While it reduces bottom-up fatigue performance, making the mixture more susceptible to fatigue cracking from the lower layers, it simultaneously enhances resistance to top-down fatigue cracking, which originates at the pavement surface.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"58 4","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143871439","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

New method for prediction of punching resistance of flat slabs with shear reinforcement and its comparison with recently proposed code provisions 提出了一种新的抗剪配筋平板冲切抗力预测方法，并与最新规范规定进行了比较

IF 3.4 3区工程技术

Materials and Structures Pub Date : 2025-04-25 DOI: 10.1617/s11527-025-02649-2

Lukáš Lyčka, Petr Štěpánek

{"title":"New method for prediction of punching resistance of flat slabs with shear reinforcement and its comparison with recently proposed code provisions","authors":"Lukáš Lyčka, Petr Štěpánek","doi":"10.1617/s11527-025-02649-2","DOIUrl":"10.1617/s11527-025-02649-2","url":null,"abstract":"<div><p>The use of flat slabs in constructions is wide-spread due to its many functional and economic advantages. Behavior of flat slabs in shear and flexure is a complex problem and over the last decades several buildings have collapsed due to the failure of the punching shear strength, resulting in loss of lives and financial damages. These disasters revealed gaps in the current (or former) design codes and recommendations. A new method for predicting the punching shear strength of flat slabs with shear reinforcement has been developed. This method incorporates a simple system of struts and ties within the shear crack region while utilizing the current Eurocode 2 model for predicting the punching shear strength without shear reinforcement. The accuracy and safety of predictions of the newly developed method were evaluated against some of the major design codes and standards. Specifically, it was compared with the current Eurocode EN 1992, with the final proposition of the newly proposed Eurocode FprEN 1992, and with the method presented in Model Code 2020. This comparison was carried out using experimental data from load tests on flat slab specimens with shear reinforcement that were published in the scientific literature over the last half of a century. The newly developed method achieved the lowest coefficient of variation among all the compared methods while also obtaining the fewest prediction results that could be deemed unsafe due to overestimation of punching shear resistance.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"58 4","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1617/s11527-025-02649-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143875451","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

Stress–strain behavior of CFRP-bond to steel in tension cfrp粘结剂与钢的应力-应变特性

IF 3.4 3区工程技术

Materials and Structures Pub Date : 2025-04-24 DOI: 10.1617/s11527-025-02666-1

Dinar Gumilang Jati, Mhd Rony Asshidiqie, Bobby Rio Indriyantho, Viktor Mechtcherine, Buntara Sthenly Gan, Ay Lie Han

{"title":"Stress–strain behavior of CFRP-bond to steel in tension","authors":"Dinar Gumilang Jati, Mhd Rony Asshidiqie, Bobby Rio Indriyantho, Viktor Mechtcherine, Buntara Sthenly Gan, Ay Lie Han","doi":"10.1617/s11527-025-02666-1","DOIUrl":"10.1617/s11527-025-02666-1","url":null,"abstract":"<div><p>Carbon fiber reinforced polymer (CFRP) sheets are used to externally reinforce structural elements. Compatibility is of major importance to transfer stresses and strains from the reinforced member to the CFRP through the bond. This bond is a contribution of three layers: the adhesive-to-structure, the adhesive-to-CFRP bond, and the properties of the adhesive-impregnated CFRP. While in modeling, the CFRP is assumed to be fully bonded; test results suggested that this assumption overestimated post-peak responses in particular. Defining accurate CFRP bond behavior is therefore obligatory in modeling. This research aimed to construct accurate stress–strain responses of CFRP bond layers. The study acquired this by investigating the strain-gauge responses at each layer as a function of incremental loading. CFRP sheets with a variation in length ranging from 40 to 120 mm were attached to a 300 mm steel plate subjected to flexural stresses. The CFRP was situated in the tensile zone. The steel plate was favored to ensure the failure mode occurred in the CFRP layer. It was concluded that bond length significantly influenced the transfer mechanism, concluding a minimum effective CFRP length of 100 mm. All stress–strain bond relationships are characterized by bilinear responses, with almost identical adhesive-to-CFRP and impregnated CFRP behavior. The adhesive-to-structural layer had a lower ultimate stress and post-peak response; initial stiffnesses were undifferentiated. An implementation of the obtained stress–strain response into a finite element analysis (FEA) demonstrated the accuracy of the results and the significant deviation when a full bond is assumed through the toughness of the strengthened member.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"58 4","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143871436","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

Recommendation of RILEM TC 280-CBE: Standardised design and analysis of the multiphase composition of bitumen emulsion–cement composites RILEM TC 280-CBE推荐：沥青乳液-水泥复合材料多相组成的标准化设计和分析

IF 3.4 3区工程技术

Materials and Structures Pub Date : 2025-04-23 DOI: 10.1617/s11527-025-02612-1

Miomir Miljković, Andrea Graziani

{"title":"Recommendation of RILEM TC 280-CBE: Standardised design and analysis of the multiphase composition of bitumen emulsion–cement composites","authors":"Miomir Miljković, Andrea Graziani","doi":"10.1617/s11527-025-02612-1","DOIUrl":"10.1617/s11527-025-02612-1","url":null,"abstract":"<div><p>The composites of bitumen emulsion and cement used for structural layers of road pavements are heterogeneous materials composed of bitumen emulsion and cement as co-binders, mineral aggregate as a granular skeleton, and pore space. Physicochemical interactions between phases determine the temporal evolution of the composites’ macroscopic properties. Therefore, the complex multiscale organisation of these composites with the abundance of time-dependent interactions requires a standardised approach to the design and analysis of mixtures’ and specimens’ composition, which is applicable in both experimental scientific research and industrial development of these materials. The purpose of this RILEM recommendation is to standardise a universally applicable method for the analytical quantification of the volumetric and gravimetric relations between the individual phases throughout the composite’s evolution over time (from the mixture design to the ultimate state of curing). The method proposed in this document is based on the length scale of mortar with fine aggregate (filler and sand) including the processes of specimen preparation and curing. This approach also enables a consistent and reproducible characterisation of the influence of the co-binders’ intrinsic properties on the overall physicochemical and mechanical behaviour of their mixtures in pavement layers. Three dominant processes considered by this methodology are (1) breaking of emulsion, (2) hydration of cement, and (3) evaporative drying. Although this method unifies the design of fine-aggregate model systems as structural components of pavement layers, the developed relations are generally applicable for any range of the particle size distribution.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"58 4","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143865543","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 UHPC precast double-column piers with socket connections 采用承插式连接的超高性能混凝土预制双柱墩的抗震性能

IF 3.4 3区工程技术

Materials and Structures Pub Date : 2025-04-23 DOI: 10.1617/s11527-025-02667-0

Jinliang Liu, Mingfei Li, Guanhua Zhang

{"title":"Seismic performance of UHPC precast double-column piers with socket connections","authors":"Jinliang Liu, Mingfei Li, Guanhua Zhang","doi":"10.1617/s11527-025-02667-0","DOIUrl":"10.1617/s11527-025-02667-0","url":null,"abstract":"<div><p>Ultra-high performance concrete (UHPC) offers excellent seismic toughness, but its use as a full structural material remains underexplored. In this study, the UHPC cast-in-place double-column pier and the UHPC precast socket-connected double-column pier were designed and fabricated. Seismic performance was evaluated through quasi-static loading tests, analyzing failure modes and mechanical responses. Both piers experienced flexural failure. However, the precast pier demonstrated a 16.5% increase in ultimate load capacity and a 4.5% increase in cumulative energy dissipation compared to the cast-in-place pier. The superior seismic performance of the precast pier is attributed to the shear keys in the socket section, which enhance joint anchoring, and the UHPC columns embedded in the foundation and cap beam, which fully utilize the mechanical properties of the material. Finite element analysis was conducted to investigate the influence of factors such as socket depth, axial load ratio, grout strength, and rebar properties on the seismic performance of the piers. Results indicate that grout strength and longitudinal rebar strength have a substantial effect on the yield capacity and ultimate load capacity of the piers. Finally, displacement angle limits for UHPC double-column piers at various performance levels were proposed based on seismic design codes. Research on UHPC precast piers is expected to promote the adoption of precast methods and advanced materials in bridge substructures, providing strong support for bridge design in seismic regions.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"58 4","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143865544","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

Moisture content, temperature, and grain orientation in timber and their effects on the viscoelastic properties and the characteristics of ultrasonic-guided waves 木材的含水率、温度和晶粒取向及其对超声导波黏弹性和特性的影响

IF 3.4 3区工程技术

Materials and Structures Pub Date : 2025-04-19 DOI: 10.1617/s11527-025-02638-5

Reem Yassine, Samir Mustapha, Paweł H. Malinowski

{"title":"Moisture content, temperature, and grain orientation in timber and their effects on the viscoelastic properties and the characteristics of ultrasonic-guided waves","authors":"Reem Yassine, Samir Mustapha, Paweł H. Malinowski","doi":"10.1617/s11527-025-02638-5","DOIUrl":"10.1617/s11527-025-02638-5","url":null,"abstract":"<div><p>Timber is an essential natural material used in engineering applications, and its performance should be enhanced to ensure safe and long-term usage. This work studies the effect of moisture content (MC), temperature, and grain orientation on timber’s viscoelastic properties. Accordingly, a non-destructive testing method is developed using a non-contact laser Doppler vibrometer (LDV) on timber structures. A dynamic mechanical analyzer (DMA) is employed to measure timber’s viscoelastic properties with 0% to ~ 22% MCs and over − 20°C to 100°C for longitudinal, tangential, and radial specimens. Additionally, the dominant ultrasonic-guided wave (GW) is explored while studying the propagating modes in 10% to 27% moist timbers. The phase velocities are computed and compared to the analytical curves generated from the mechanical properties extracted from the DMA data. The results showed that the storage modulus, loss modulus, and tan δ decrease with increasing temperature and MC. Longitudinally, the storage modulus reduced by 27.5% at 0% MC and by 57.7% at 18% MC within the studied temperature range. The reduction is larger transversely than longitudinally, and the lowest storage modulus is observed radially. The relaxation peaks shifted to lower temperatures as MC increased. LDV results proved A<sub>0</sub> mode is dominant, and its phase velocities matched analytical results. The change in phase velocity is proportional to MC and temperature, due to the MC effect on timber’s mechanical properties. The presented results showed high promise in terms of characterizing the viscoelastic behavior and the high sensitivity of A<sub>0</sub> mode along various directions of grain growth and MC.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"58 4","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143850937","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

Avocado peel ash as a supplementary cementitious material: study of a new binder 牛油果皮灰作为补充胶凝材料：一种新型粘结剂的研究

IF 3.4 3区工程技术

Materials and Structures Pub Date : 2025-04-17 DOI: 10.1617/s11527-025-02631-y

Maria Julia Xavier Esteves, José Alexandre Tostes Linhares Júnior, Leonardo Carvalho Mesquita, Marília Gonçalves Marques, Afonso Rangel Garcez de Azevedo, Markssuel Teixeira Marvila

{"title":"Avocado peel ash as a supplementary cementitious material: study of a new binder","authors":"Maria Julia Xavier Esteves, José Alexandre Tostes Linhares Júnior, Leonardo Carvalho Mesquita, Marília Gonçalves Marques, Afonso Rangel Garcez de Azevedo, Markssuel Teixeira Marvila","doi":"10.1617/s11527-025-02631-y","DOIUrl":"10.1617/s11527-025-02631-y","url":null,"abstract":"<div><p>In this research, avocado peel ash was tested as a supplementary cementitious material to Portland cement in mortars. The characterization of the material showed high potassium and iron content, implying that the material is not a pozzolan, but has potential for application as a cementitious material due to its amorphous structure and granulometry compatible with cement. Tests of mass density in the fresh state, incorporated air, calorimetry, water absorption, mass density in the hardened state and compressive strength at 7 and 28 days were tested, using compositions 1:3:0.60 (cement: sand: water), with replacement of 0, 5 and 10% of cement by avocado peel ash. The results of the consistency and incorporated air test showed that avocado peel ash reduces workability when compared to the reference composition but causes a reduction in water absorption and an increase in compressive strength, when used in 5% replacement. Furthermore, avocado peel ash causes a delay in cement hydration, increasing the dormancy in calorimetry tests, although this does not imply a reduction in strength at 7 and 28 days for 5% composition. This occurs because the use of avocado peel ash promotes the formation of a hydrated potassium-calcium fayalite phase as a complement to the formation of C–S–H, as demonstrated in the XRD, DTA/TGA and SEM results. However, the use of 10% avocado peel ash promotes the delay in cement setting, reducing compressive strength at 7 and 28 days because of the high content of K<sub>2</sub>O and Al<sub>2</sub>O<sub>3</sub> present in the material. It is concluded that the use of avocado peel ash is viable as a supplementary cementitious material, if it is limited to contents of 5%.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"58 4","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143845711","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