Materials and Structures最新文献_第3页

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

Factors affecting the carbon footprint of reinforced concrete structures 影响钢筋混凝土结构碳足迹的因素

IF 3.4 3区工程技术

Materials and Structures Pub Date : 2025-04-17 DOI: 10.1617/s11527-025-02641-w

Fawaz Almasailam, Phil Purnell, Leon Black

{"title":"Factors affecting the carbon footprint of reinforced concrete structures","authors":"Fawaz Almasailam, Phil Purnell, Leon Black","doi":"10.1617/s11527-025-02641-w","DOIUrl":"10.1617/s11527-025-02641-w","url":null,"abstract":"<div><p>With the need to decarbonise global cement and concrete production, much emphasis has been placed on the use of supplementary cementitious materials, such as ground granulated blast furnace slag. However, while such blends can significantly reduce the carbon footprint of cements, other options are also available to decarbonise concrete structures. For example, changing the dimensions of structural elements or concrete strengths can affect both the volume of structural concrete and its carbon footprint. This study has examined the effects of changing concrete strength, span and binder type on the carbon footprint of a hypothetical two-storey concrete structure. Furthermore, durability requirements can impose additional demands, such as higher-grade concrete or greater cover depths, affecting the structure’s carbon footprint. Thus, these structures were designed to resist a non-aggressive (XC1) and a mildly aggressive (XS1) environment. Higher-strength concrete, despite allowing dematerialisation, increased the carbon footprint of the structures, as did longer beam spans. The use of a 50% GGBS CEM III/A-S cement offered significant carbon reduction potential, with greater carbon reduction in a mildly aggressive environment. GGBS is a limited resource, so while it can always reduce concrete’s carbon footprint, its use should be focused where it can also offer durability benefits.</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":"https://link.springer.com/content/pdf/10.1617/s11527-025-02641-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143840408","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

Regulating the performance of NaOH-activated slag using vitamin B3, B6, and C as bio-admixtures: a comparison study 维生素B3、B6和C作为生物外加剂调节naoh活性渣性能的比较研究

IF 3.4 3区工程技术

Materials and Structures Pub Date : 2025-04-17 DOI: 10.1617/s11527-025-02642-9

Zeren Chen, Peiyuan Chen, Shangkun Li, Lei Wang, Xianggeng Wang, Weibo Tan, Yonghui Wang, Jialai Wang

{"title":"Regulating the performance of NaOH-activated slag using vitamin B3, B6, and C as bio-admixtures: a comparison study","authors":"Zeren Chen, Peiyuan Chen, Shangkun Li, Lei Wang, Xianggeng Wang, Weibo Tan, Yonghui Wang, Jialai Wang","doi":"10.1617/s11527-025-02642-9","DOIUrl":"10.1617/s11527-025-02642-9","url":null,"abstract":"<div><p>This study proposes the use of commonly existing natural compounds, Vitamin B3 (VB3), vitamin B6 (VB6), and vitamin C (VC), as bio-admixtures to regulate the performance of alkali-activated slag (AAS). The experimental results suggested that VB3, VB6, and VC could act as retardants to prolong the setting time, plasticizers to improve the fluidity, strength enhancers to increase the compressive strength, and shrinkage reducers to reduce the autogenous shrinkage of AAS. Among them, VC exhibited the highest efficiency as a performance enhancer than VB3 and VB6 with the same dosage. Specifically, the addition of 0.3% VC extended the setting time by 223%, increased the fluidity to 18.65%, and enhanced the 28-day compressive strength by 13.7%, while reducing the 28-day autogenous shrinkage by 45.2%, compared with the blank mixture. Furthermore, by comparing the molecular structures of VB3, VB6, and VC, the mechanisms of various vitamins in influencing the performance of AAS were analyzed and revealed.Journal instruction requires a city and country for affiliations; however, city is missing in affiliation 1. Please verify if the provided city is correct and amend if necessary.The Huainan in affiliation 1 is the institutional city, and the cities in all affiliations are correct.</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":"143840406","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

Exploring the carbon sequestration of an asphalt base course mixture containing novel cold-bonded biochar-rich lightweight aggregates 探索含有新型冷粘合富生物炭轻质骨料的沥青基层混合料的固碳性能

IF 3.4 3区工程技术

Materials and Structures Pub Date : 2025-04-17 DOI: 10.1617/s11527-025-02639-4

Daniel Grossegger, Mateusz Wyrzykowski, Nikolajs Toropovs, Pietro Lura

{"title":"Exploring the carbon sequestration of an asphalt base course mixture containing novel cold-bonded biochar-rich lightweight aggregates","authors":"Daniel Grossegger, Mateusz Wyrzykowski, Nikolajs Toropovs, Pietro Lura","doi":"10.1617/s11527-025-02639-4","DOIUrl":"10.1617/s11527-025-02639-4","url":null,"abstract":"<div><p>An emerging strategy to compensate for the greenhouse gas emissions of products is to incorporate carbonaceous materials obtained from removed atmospheric carbon dioxide, mainly obtained through biomass conversion. This approach can turn asphalt pavements into a functional carbon sink. In particular, biochar has been used as a bitumen modifier. However, due to performance limitations, carbonaceous materials were only added in small quantities to asphalt mixtures. An alternative approach is to produce lightweight aggregates to substitute a part of the mineral aggregates of the asphalt mixture. To this end, biochar is pelletised with a hydraulic binder and water in a cold-bonding process, forming spherical pellets labelled as carbon-rich lightweight aggregates (C-LWA). Like other lightweight aggregates, C-LWA showed a reduced mechanical strength compared to conventional mineral aggregates, adversely affecting the asphalt mixture performance. Cracking and rutting resistance almost linearly decreased with C-LWA content. The direct addition of biochar had a similar adverse influence on the mixture performance. Despite a reduced performance, adding biochar and C-LWA reduces the greenhouse gas emissions of asphalt mixtures. Net-zero emissions were estimated for the produced asphalt mixture by adding 5.5 ± 0.4% C-LWA or 3.0 ± 0.2% biochar obtained from the pyrolysis of landscape management wood. A wider range of C-LWA addition (1% to 35.1%) was estimated considering the greenhouse gas emission estimation variability of both asphalt and biochar production.</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":"https://link.springer.com/content/pdf/10.1617/s11527-025-02639-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143840409","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

RILEM TC 275-HDB: results of round-robin testing for the vapor permeability of hemp concrete RILEM TC 275-HDB：大麻混凝土透气性的循环试验结果

IF 3.4 3区工程技术

Materials and Structures Pub Date : 2025-04-17 DOI: 10.1617/s11527-025-02644-7

Thibaut Colinart, Camille Magniont

{"title":"RILEM TC 275-HDB: results of round-robin testing for the vapor permeability of hemp concrete","authors":"Thibaut Colinart, Camille Magniont","doi":"10.1617/s11527-025-02644-7","DOIUrl":"10.1617/s11527-025-02644-7","url":null,"abstract":"<div><p>Determining the hygrothermal properties of bio-based construction products on a material scale is a major challenge in order to highlight and guarantee their performances. These data are also essential to feed models at wall and building scales for prediction and optimization of their contribution to energy consumption and user’s comfort. Among these properties, water vapor permeability is commonly measured with the dry cup method. Despite the good repeatability and reproducibility of this test when performed in one lab, one can observe a high level of discrepancy in the literature values. To address the origin of these differences and establish recommendations for the characterization of highly hygroscopic and permeable bio-based materials, an interlaboratory test is therefore necessary. In the context of the activities of the RILEM TC 275-HDB, two interlaboratory campaigns have been launched to measure the water vapor permeability of bio-aggregate based building materials by means of cup test. The analysis of the results from six participating laboratories from different countries highlighted the main sources of discrepancy, in particular the progressive saturation of the desiccant during the experiment and the incompatibility of the “steady state” criterion and the air velocity recommended by the standard ISO 12572 in the case of highly permeable materials. Despite the many sources of uncertainties, recommendations are proposed to improve the accuracy of this measurement for permeable materials such as a continuous measurement of the vapor pressure within the air layer and the measurement of the air velocity above each cup to evaluate the local interface resistance.</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":"https://link.springer.com/content/pdf/10.1617/s11527-025-02644-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143840407","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

Salt-scaling resistance of biomimetic PEG-PVA-modified concrete 仿生peg - pva改性混凝土的耐盐结垢性能

IF 3.4 3区工程技术

Materials and Structures Pub Date : 2025-04-16 DOI: 10.1617/s11527-025-02623-y

Mohammad Matar, Anastasia N. Aday, Caitlin J. Adams, Prannoy Suraneni, Wil V. Srubar III

{"title":"Salt-scaling resistance of biomimetic PEG-PVA-modified concrete","authors":"Mohammad Matar, Anastasia N. Aday, Caitlin J. Adams, Prannoy Suraneni, Wil V. Srubar III","doi":"10.1617/s11527-025-02623-y","DOIUrl":"10.1617/s11527-025-02623-y","url":null,"abstract":"<div><p>Concrete exposed to deicing salts during freezing and thawing cycles is prone to salt-scaling damage. The superficial damage of salt scaling can lead to further deterioration through increased ingress of water and harmful ions (e.g.., chloride), thereby decreasing the long-term durability of concrete. Commonly, air-entraining admixtures (AEAs) are prescribed to prevent salt scaling. While previous research has substantiated that biomimetic antifreeze polymers can provide internal freeze–thaw protection to concrete exposed to cyclic freezing and thawing through the prevention of ice nucleation and growth (in lieu of AEAs), no studies yet report on the salt-scaling resistance of concrete modified with biomimetic antifreeze polymers, such as poly(ethylene)-graft-poly(vinyl alcohol) (PEG-PVA). Here, the effect of water- and polymer-to-cement ratio on the salt scaling resistance of PEG-PVA-modified concrete was investigated and compared to plain and AEA-modified concrete. At a water-to-cement ratio (<i>w/c</i>) of 0.45 (i.e., below the onset of more severe salt scaling damage at <i>w/c</i> = 0.5) the addition of PEG-PVA (0.066% by weight of cement) to concrete improved air-void parameters (i.e., specific surface area and spacing factor) while reducing water absorption over 14 days to significantly below that of traditional AEA-modified concrete. Furthermore, in 0.55 <i>w/c</i> concretes, the addition of PEG-PVA (0.066% and 0.10% by weight of cement) reduced salt-scaling to a degree comparable to that of 0.45 <i>w/c</i> concrete.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"58 4","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1617/s11527-025-02623-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143840387","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