Materials and Structures最新文献

Enhancing adhesion of carbon-glass hybrid fibre-reinforced polymer tubes to seawater sea sand concrete through surface sand coating 通过表面砂涂层增强碳玻混合纤维增强聚合物管对海水海砂混凝土的附着力

IF 3.4 3区工程技术

Materials and Structures Pub Date : 2024-11-24 DOI: 10.1617/s11527-024-02521-9

Jivan Subedi, Nicholas Glinatsis, Milad Bazli, Ali Rajabipour, Ali Hadigheh, Reza Hassanli, Mehrdad Arashpour

{"title":"Enhancing adhesion of carbon-glass hybrid fibre-reinforced polymer tubes to seawater sea sand concrete through surface sand coating","authors":"Jivan Subedi, Nicholas Glinatsis, Milad Bazli, Ali Rajabipour, Ali Hadigheh, Reza Hassanli, Mehrdad Arashpour","doi":"10.1617/s11527-024-02521-9","DOIUrl":"10.1617/s11527-024-02521-9","url":null,"abstract":"<div><p>The bond strength at the interface between seawater sea sand concrete (SWSSC) and fiber-reinforced polymer (FRP) tubes is critical but remains understudied. This paper examines the improvement of bond behaviour between SWSSC and carbon-glass hybrid FRP tubes using a surface sand coating technique. Four different grading of sand coating were used to alter the surface roughness. Push-out tests were conducted on the specimens to determine the bond strength and failure modes. It was found that increasing surface roughness through sand coating significantly enhances bond strength, making it up to 239 times stronger than that of uncoated samples. However, although the coating with the largest particle size and broader particle distribution showed a slightly higher bond strength compared to other types, the difference was not statistically significant. Therefore, it can be concluded that, regardless of the coating grading, sand coating significantly improves the bond strength with no notable difference in their effectiveness level. The findings of this study provide valuable insights into the use of hybrid FRP tubes with sand-coated surfaces, offering a practical solution for enhancing bond strength. These insights can inform future construction practices aimed at developing more durable, sustainable, and environmentally-friendly materials, helping to reduce the carbon footprint of the construction industry.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"57 10","pages":""},"PeriodicalIF":3.4,"publicationDate":"2024-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142692024","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 coarse recycled aggregate with embedded fibres on the mechanical properties and microstructure of polypropylene fibre-reinforced concrete 嵌入纤维的粗再生骨料对聚丙烯纤维增强混凝土力学性能和微观结构的影响

IF 3.4 3区工程技术

Materials and Structures Pub Date : 2024-11-22 DOI: 10.1617/s11527-024-02527-3

Guanzhi Liu, Josep Claramunt, Martin Hunger, Nikola Tošić, Albert de la Fuente

{"title":"Effect of coarse recycled aggregate with embedded fibres on the mechanical properties and microstructure of polypropylene fibre-reinforced concrete","authors":"Guanzhi Liu, Josep Claramunt, Martin Hunger, Nikola Tošić, Albert de la Fuente","doi":"10.1617/s11527-024-02527-3","DOIUrl":"10.1617/s11527-024-02527-3","url":null,"abstract":"<div><p>Previous studies have shown the feasibility of using recycled aggregates in new concrete production. However, the recycling of fibre-reinforced concrete (FRC) introduces a novel challenge: the emergence of a new aggregate type that can be identified as recycled aggregate with embedded fibres. Therefore, in this study, in order to investigate the differences, the mechanical properties and microstructures of polypropylene fibre-reinforced concrete (PPFRC) made of natural coarse aggregate, coarse recycled aggregate and coarse recycled aggregate with embedded fibres were compared. Polypropylene fibre contents of 3 and 9 kg/m<sup>3</sup> (0.33% and 1.0% by volume, respectively) were chosen for all concretes. The mechanical properties, including stress–strain behaviour in compression and flexural behavior, were tested. Scanning electron microscopy (SEM) was used to examine the microstructure and elucidate the effects of different aggregates on PPFRC properties. The results indicated that recycled aggregate with embedded fibres did not enhance compressive strength and elastic modulus compared to recycled aggregate without fibres. However, when the fibre content is low, its contribution to flexural behavior is significant, even surpassing that of PPFRC made with natural aggregate.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"57 10","pages":""},"PeriodicalIF":3.4,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1617/s11527-024-02527-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142679712","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 and validation of an innovative Hybrid Laminate Material for the blast and fire protection of structures 开发和验证用于结构防爆防火的创新型混合层压材料

IF 3.4 3区工程技术

Materials and Structures Pub Date : 2024-11-21 DOI: 10.1617/s11527-024-02523-7

Thomaida Polydorou, Robert Ponsian Mwombeki, Ioanna Giannopoulou, Demetris Demetriou, Konstantina Oikonomopoulou, Demetris Nicolaides, Michael F. Petrou

{"title":"Development and validation of an innovative Hybrid Laminate Material for the blast and fire protection of structures","authors":"Thomaida Polydorou, Robert Ponsian Mwombeki, Ioanna Giannopoulou, Demetris Demetriou, Konstantina Oikonomopoulou, Demetris Nicolaides, Michael F. Petrou","doi":"10.1617/s11527-024-02523-7","DOIUrl":"10.1617/s11527-024-02523-7","url":null,"abstract":"<div><p>This study presents the development of a novel Hybrid Laminate Material (HLM), particularly a dual-layered system combining an Ultra High Performance Fiber Reinforced Concrete (UHPFRC) and a Fire Resistant Geopolymer (FRG). The novel material is engineered to provide blast and impact as well as fire resistance, seeking to address the critical challenge of explosive spalling of concrete under high and rapidly rising temperatures while preserving structural integrity to withstand blast and impact loads. The FRG layer composition is optimized for environmental friendliness and cost, while assuring the formation of refractory phases at high temperatures to ensure adequate resistance to extreme temperatures. In parallel, a blast and impact-resistant UHPFRC layer is further optimized, aiming to provide exceptional compressive and flexural strength while minimizing fiber content and cost. The results highlight the development of a promising HLM that offers an environmentally friendly, cost-effective solution for enhancing the safety and resilience of critical infrastructure, incorporating robust, multifunctional building materials that can resist blast, impact, and endure extreme thermal conditions. The two layers demonstrate excellent results in their respective functions. The developed FRG successfully maintained its compressive strength while withstanding temperatures up to 1050 °C. Furthermore, an environmentally friendlier UHPFRC was designed, including 2% steel and 1% Polyvinyl Alcohol (PVA) fibers, without sacrificing the capacity to withstand blast and impact.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"57 10","pages":""},"PeriodicalIF":3.4,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142679878","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 sulfate attack on geopolymer mortars at early ages of exposure 硫酸盐侵蚀对土工聚合物砂浆早期龄期的影响

IF 3.4 3区工程技术

Materials and Structures Pub Date : 2024-11-21 DOI: 10.1617/s11527-024-02526-4

Neusa Aparecida Munhak Beltrame, Amanda Venancio Trisotto, Rafaela Souto, João Claudio Nascimento da Silva, Bárbara Cicuto Gonçalves Pereira, Ronaldo A. Medeiros-Junior

{"title":"Effect of sulfate attack on geopolymer mortars at early ages of exposure","authors":"Neusa Aparecida Munhak Beltrame, Amanda Venancio Trisotto, Rafaela Souto, João Claudio Nascimento da Silva, Bárbara Cicuto Gonçalves Pereira, Ronaldo A. Medeiros-Junior","doi":"10.1617/s11527-024-02526-4","DOIUrl":"10.1617/s11527-024-02526-4","url":null,"abstract":"<div><p>Geopolymers have generated interest due to their potential to be used as an alternative binder to Portland cement. This study investigated the effects of sodium and magnesium sulfate attack on metakaolin-based geopolymer mortars (MK) considering different concentrations of silica in the activator (Ms), Na<sub>2</sub>O/MK ratio, and the inclusion of an air-entraining additive. Geopolymer mortars prepared with metakaolin and a combination of Na<sub>2</sub>SiO<sub>3</sub> and NaOH were cured for 84 days. The visual appearance, linear dimensional change, mass variation, and microstructure were monitored during two weeks of immersion in a Na<sub>2</sub>SO<sub>4</sub> and MgSO<sub>4</sub> solution at 40 ºC to understand the behavior of this material in early ages. The results indicated that the highest compressive strength was achieved with Ms = 1.5 and Na<sub>2</sub>O/MK content of 22%. The addition of the air-entrainer to the geopolymeric mixtures minimized the expansion of the samples. This effect was attributed to the accommodation of the expansive phases in the air bubbles. The sulfate resistance of the geopolymeric material is significantly dependent on the dosage and different performances were found in the first weeks of exposure to sulfates.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"57 10","pages":""},"PeriodicalIF":3.4,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142679766","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 emulsifier type on the properties of cement asphalt mortar for non-ballast slab tracks 乳化剂类型对用于无碴板式轨道的水泥沥青砂浆性能的影响

IF 3.4 3区工程技术

Materials and Structures Pub Date : 2024-11-21 DOI: 10.1617/s11527-024-02513-9

Rahul Reddy Banapuram, Kranthi K. Kuna, Amaranatha Reddy Muppireddy

{"title":"Effect of emulsifier type on the properties of cement asphalt mortar for non-ballast slab tracks","authors":"Rahul Reddy Banapuram, Kranthi K. Kuna, Amaranatha Reddy Muppireddy","doi":"10.1617/s11527-024-02513-9","DOIUrl":"10.1617/s11527-024-02513-9","url":null,"abstract":"<div><p>This study examines the impact of asphalt emulsions produced from ionic (cationic and anionic) and non-ionic emulsifiers on the properties of cement asphalt mortar (CAM) concerning to high-speed rail slab track applications. Fresh and hardened mortar properties, such as flow time, material separation, and compressive strength are critical CAM properties considering specific application requirements in Shinkansen slab track systems. CAM were produced with asphalt emulsions of different polarity. Rheological, surface, and thermal properties were studied to understand the behavior of the mortar at different scales. Results reveal that CAM with anionic emulsions offers better stability and workability in cement environments compared to non-ionic and cationic emulsions. The evaluation of the thixotropic behavior of cement asphalt pastes revealed that cationic emulsion-based pastes exhibited higher flocculation over time. Material separation tests of hardened mortar properties show that CAM with cationic emulsion leads to the highest homogeneity, followed by non-ionic emulsions, while anionic emulsions result in poor homogeneity and the highest material separation. This behavior is attributed to the adaptability of asphalt emulsion to fine aggregates. Compressive strength study indicates that using cationic emulsions in CAM production enhances early strength (1 day), whereas CAM with anionic emulsions show delayed setting with relatively low early strength but higher later strength (28 days) due to the selective adsorption of asphalt droplets over cement phases. Considering flow time, material separation, and compressive strength, CAM with non-ionic emulsions exhibits balanced performance and is suitable for producing CAM with the desired characteristics.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"57 10","pages":""},"PeriodicalIF":3.4,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142679765","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

Experimental investigation on the fatigue properties of studs under the coupling of load and corrosion environment 载荷和腐蚀环境耦合下螺柱疲劳特性的实验研究

IF 3.4 3区工程技术

Materials and Structures Pub Date : 2024-11-19 DOI: 10.1617/s11527-024-02519-3

Yachuan Kuang, Sihui Peng, Liping Wang, Libin Chen, Weikang Li

{"title":"Experimental investigation on the fatigue properties of studs under the coupling of load and corrosion environment","authors":"Yachuan Kuang, Sihui Peng, Liping Wang, Libin Chen, Weikang Li","doi":"10.1617/s11527-024-02519-3","DOIUrl":"10.1617/s11527-024-02519-3","url":null,"abstract":"<div><p>This study investigated the influence of the coupling of load and corrosion environment on the fatigue properties of studs. Static tests were conducted on two push-out specimens, and fatigue tests were performed on six push-out specimens after three cycles of corrosion and fatigue alternation. The findings were compared with fatigue test results from push-out specimens subjected to pure corrosion. The analysis focused on the effects of the load and corrosion environment coupling on failure modes, fatigue life, fatigue crack length, and relative slip at the interface of the studs. The results indicated that the failure modes of all push-out specimens in both static and fatigue tests were stud shear failure. Shear failure occurred at the root of studs. Furthermore, the fatigue life of the studs decreased exponentially as corrosion ratios increased. An increase in the number of pre-fatigue cycles intensified the coupling effect of load and corrosion environment on fatigue life. The length of the fatigue fracture surface in the studs also exhibited an exponential decrease with increasing corrosion ratios. Additionally, higher corrosion ratios and a greater number of pre-fatigue cycles resulted in an accelerated the relative slip growth rate at the interface between concrete flange slabs and steel girders. The relative slip curve at the interface displayed a distinct two-stage development pattern: a stable growth stage and a rapid growth stage. The coupling effect of load and corrosion environment significantly enhanced the relative slip growth rate at the interface. This effect was amplified with increased pre-fatigue cycles and higher corrosion ratios, leading to a faster relative slip growth rate at the interface.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"57 10","pages":""},"PeriodicalIF":3.4,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142672542","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

Optimised biopolymer-based capsules for enhancing the mechanical and self-healing properties of asphalt mixtures 优化生物聚合物胶囊，提高沥青混合料的机械和自愈性能

IF 3.4 3区工程技术

Materials and Structures Pub Date : 2024-11-19 DOI: 10.1617/s11527-024-02508-6

Jose Norambuena-Contreras, Jose L. Concha, Gonzalo Valdes-Vidal, Clare Wood

{"title":"Optimised biopolymer-based capsules for enhancing the mechanical and self-healing properties of asphalt mixtures","authors":"Jose Norambuena-Contreras, Jose L. Concha, Gonzalo Valdes-Vidal, Clare Wood","doi":"10.1617/s11527-024-02508-6","DOIUrl":"10.1617/s11527-024-02508-6","url":null,"abstract":"<div><p>The growing need to enhance our road infrastructure has driven the development of several innovative techniques in recent years. Among these advancements, encapsulated rejuvenator solutions for extrinsic self-healing asphalt have emerged as a significant topic of interest. This paper evaluates the effect of optimised capsules containing vegetal oil as a biorejuvenator on the physical, mechanical, and self-healing properties of dense asphalt mixtures. In this study, previously optimised polynuclear alginate-based capsules were synthesised using vibrating jet technology with 5% wt. calcium chloride and a biopolymer-to oil mass ratio 1:7. Optimised capsules were incorporated into the asphalt mixture at concentrations of 0.125% wt., 0.25% wt., and 0.5% wt. Their spatial distribution within the asphalt mixtures was evaluated using an alternative method to CT scans, which utilised machine learning-based image analysis of the core asphalt samples. The main findings of this research are as follows: (1) a uniform distribution of capsules was achieved throughout the asphalt mixture, although clustering was observed at higher concentrations. (2) The capsules successfully survived the asphalt manufacturing process, and mechanical tests highlighted the adhesive properties of the alginate encapsulation material. (3) Asphalt samples with 0.125% wt. capsules exhibited mechanical performance comparable to samples without capsules; however, this content did not significantly enhance their self-healing properties. In contrast, self-healing capabilities were significantly enhanced with a capsule content greater than or equal to 0.25% wt.; however, this enhancement slightly affected some physical–mechanical properties of the dense asphalt mixture.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"57 10","pages":""},"PeriodicalIF":3.4,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1617/s11527-024-02508-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142672543","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

Using dental X-ray imaging to measure the diffusion coefficient for concrete samples 利用牙科 X 射线成像测量混凝土样品的扩散系数

IF 3.4 3区工程技术

Materials and Structures Pub Date : 2024-11-18 DOI: 10.1617/s11527-024-02512-w

Niloofar Parastegari, M. Tyler Ley

引用次数: 0

The effect of quartz on natural fluorapatite decomposition during the preparation of calcium sulfoaluminate-based multiphase composites 石英对硫铝酸钙基多相复合材料制备过程中天然氟磷灰石分解的影响

IF 3.4 3区工程技术

Materials and Structures Pub Date : 2024-11-18 DOI: 10.1617/s11527-024-02511-x

Zeyneb Hammou, Hocine Belhouchet

引用次数: 0

Influence of thermo-hygrometric conditions on the interface bond in 3D printed concrete 热对称条件对 3D 打印混凝土界面粘接的影响

IF 3.4 3区工程技术

Materials and Structures Pub Date : 2024-11-18 DOI: 10.1617/s11527-024-02522-8

M. Taleb, D. Bulteel, A. Montagne, F. Roudet, S. Rémond, D. Chicot

{"title":"Influence of thermo-hygrometric conditions on the interface bond in 3D printed concrete","authors":"M. Taleb, D. Bulteel, A. Montagne, F. Roudet, S. Rémond, D. Chicot","doi":"10.1617/s11527-024-02522-8","DOIUrl":"10.1617/s11527-024-02522-8","url":null,"abstract":"<div><p>For the additive manufacturing in civil engineering, the cementitious ink must have contradictory properties to be printable, indeed it must be initially fluid enough to be pumpable and extrudable, and also should stiffen quickly after deposition to be buildable. These can influence the mechanical properties and the behavior of the printed structure. This work is focused on the role of the printing conditions, mainly time gap between successive layers and environmental conditions, on the quality of the interface between printed layers. The mechanical properties of the interface were studied by means of classical and instrumented indentation tests at micro and macroscopic scales jointly to bidirectional macro compression tests. In addition to the macrohardness tests, microindentation allows to study the role of the interface at a local scale by applying the interfacial weakness criterion based on a hardness profile established on a cross-section in the neighborhood to the plane of the interface. The influence of the printing conditions on the mechanical behavior of the interface is clearly highlighted. As an example, this criterion shows a degradation of the interface property with an increase in the time gap between layers in addition to the influence of the thermo-hygrometric conditions. For a better understanding of the mechanical behavior at the interface, additional instrumented indentation tests in the plane of the interface using macro-loads are carried out until the rupture. The critical load of fracture confirms the role of the printing conditions, whereas the compression tests are not able to show significant differences between the elaboration conditions. The indentation test, which is not widespread in the field of civil engineering, proves here that it can be very useful for a finest mechanical characterization of the material, especially for the characterization of the interface at a local scale.</p></div>","PeriodicalId":691,"journal":{"name":"Materials and Structures","volume":"57 10","pages":""},"PeriodicalIF":3.4,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142672634","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