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Ai-Enhanced Flipped Classroom Approach For Chinese Vocabulary And Grammar Learning, Haotian Ye Apr 2025

Ai-Enhanced Flipped Classroom Approach For Chinese Vocabulary And Grammar Learning, Haotian Ye

Theses and Dissertations

This study examines the effectiveness of ChatGPT-4 in enhancing L2 Chinese learners' vocabulary and grammar acquisition within a flipped classroom setting, focusing on its impact on learning outcomes, student motivation, and associated challenges. Conducted over 10 weeks, the study involved 19 native English speakers enrolled in a third-year Chinese course at a U.S. university. The experimental group (n = 11) used ChatGPT to self-study six target words and five grammar structures before attending Tuesday and Thursday sessions, while the control group (n = 8) followed a textbook-based approach. Participants completed in-class vocabulary and grammar quizzes twice a week, three journal …

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Responsiveness Of Desert Plant Dehydrin Genes In The Alleviation Of Abiotic Stresses, Mughair Abdul Aziz Apr 2025

Responsiveness Of Desert Plant Dehydrin Genes In The Alleviation Of Abiotic Stresses, Mughair Abdul Aziz

Thesis/ Dissertation Defenses

Dehydrins (DHNs) are hydrophilic, glycine-rich proteins that accumulate in vegetative tissues of plants in response to abiotic stress and during the late stages of seed maturation. In desert plants, these proteins likely contribute to their specialized adaptation under extreme environmental conditions. To examine the genetic mechanisms underlying DHN associated abiotic stress tolerance in desert plants, this study aimed to isolate them and investigate the architectural features and functional mechanisms related to them. It involved cloning of full-length cDNA sequences of DHN encoding genes, PcDHN1, CcDHN1, PdDHN1, and PdDHN2, from three desert plants Prosopis cineraria, Citrulus colocynthis, and Phoenix datcylifera, followed …

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Uniform Code Of By-Laws, State Of Florida, Order Of The Eastern Star Apr 2025

Uniform Code Of By-Laws, State Of Florida, Order Of The Eastern Star

Eartha M. M. White Textual Material

Booklet: South Side Chapter No. 28, Order of the Eastern Star by-laws documentation. Undated.

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Enforcement In Human Rights Due Diligence Laws: A Comparative Analysis, Ryan Schmidt Apr 2025

Enforcement In Human Rights Due Diligence Laws: A Comparative Analysis, Ryan Schmidt

Pepperdine Law Review

This Comment embarks on a comparative analysis of a variety human rights due diligence (HRDD) laws. It examines six different laws related to human trafficking and supply chains. These laws originate from five different countries and fit into two categories: (1) laws requiring a company to report what, if any, human rights due diligence it engages in and (2) laws that require more than just reporting. By surveying a wide sample of HRDD laws, this Comment provides a broad overview of this area of the law. It also describes the range of legal obligations that multinational enterprises face in different …

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Generating More Equitable Fair Use, Jacqueline Kessel Apr 2025

Generating More Equitable Fair Use, Jacqueline Kessel

Pepperdine Law Review

From advancing healthcare and education to threatening democratic systems, generative artificial intelligence (AI) has demonstrated a capacity to positively and negatively impact society. And these benefits and consequences are not shared equitably. Copyright law, however, stands as a powerful mechanism in monitoring AI system development. Several complaints have charged generative AI system developers with copyright infringement, alleging that (1) ingesting copyrighted works as training data infringes the copyright owner’s exclusive right to reproduce works in copies and (2) generating AI outputs infringes the exclusive right to prepare derivative works because the outputs are based upon the works on which the …

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What Copyright Can't Do, Blake E. Reid Apr 2025

What Copyright Can't Do, Blake E. Reid

Pepperdine Law Review

Copyright has become a powerful regulatory regime for modern American life. Copyrighted works, including text, images, video, sounds, music, and software, coupled with routine, frictionless copying, form a large part of the information, cultural and social context, and infrastructure of our increasingly digital society. Copyright law’s powerful remedies are now positioned to intervene in a wide range of everyday activities. As a result, scholars, policymakers, and advocates have increasingly called for modifying and applying U.S. copyright law to solve a wide range of public policy problems, from vindicating disability rights to protecting privacy to promoting competition among wireless carriers. But …

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Sustainable Concrete Solutions For Green Infrastructure Development: A Review, Abdur Rahman Siddiqui, Rizwan Khan, Md Nazeem Akhtar Apr 2025

Sustainable Concrete Solutions For Green Infrastructure Development: A Review, Abdur Rahman Siddiqui, Rizwan Khan, Md Nazeem Akhtar

Journal of Sustainable Construction Materials and Technologies

This review paper explores the utilization of sustainable concrete materials in the development of green infrastructure. The primary objective is to investigate various concrete solutions that enhance environmental performance while maintaining structural integrity. The study inte- grates concrete with green infrastructure elements such as permeable concrete, green roofs, vegetated systems, bioswales, and vegetated channels. These elements are essential for man- aging stormwater, reducing urban heat islands, and promoting biodiversity in urban areas. The paper also examines optimized concrete mixtures designed to improve durability and reduce carbon emissions by incorporating alternative materials like recycled aggregates and supplementary cementitious materials. Additionally, innovative …

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Environmental Risks And The Impact Of Rehabilitation On The Sustainability Of Affected Buildings In Urban Communities, Ammar Tawashi, Soleman Alamoudi, Madiha Akkash Apr 2025

Environmental Risks And The Impact Of Rehabilitation On The Sustainability Of Affected Buildings In Urban Communities, Ammar Tawashi, Soleman Alamoudi, Madiha Akkash

Journal of Sustainable Construction Materials and Technologies

This work explores how the rehabilitation sector can significantly minimize environmental risk by restoring, maintaining, strengthening, and installing practices in rehabilitation or new construction projects. The rehabilitation of affected buildings is considered an effective strat- egy to reduce the impact of pollution on the construction industry and rebuild the resilience of urban communities by preserving the structures and improving their performance capacity. Encouraging the reuse of more efficient materials and modern technologies and applying sus- tainability principles (Green, Local, and Digital). The results of the sample of 45 buildings sur- veyed and rehabilitated in the field show that around 80% …

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Investigation Of Coconut Shell Biochar As An Eco-Friendly Additive To Mitigate The Alkali-Silica Reaction In Recycled Aggregate Concrete, Kokıla Arandara, G. N. Paranavithana, S. T. Priyadarshana, H Pitawala, R Dissanayake Apr 2025

Investigation Of Coconut Shell Biochar As An Eco-Friendly Additive To Mitigate The Alkali-Silica Reaction In Recycled Aggregate Concrete, Kokıla Arandara, G. N. Paranavithana, S. T. Priyadarshana, H Pitawala, R Dissanayake

Journal of Sustainable Construction Materials and Technologies

Alkali-Silica Reaction (ASR) in Recycled Aggregate Concrete (RAC) is one of the main chal- lenges in using demolished concrete in construction. Several methods are available to mitigate the impact of ASR, and they have less circular economic potential. This study aims - to investi- gate the possibility of coconut shell biochar (CSB) as an eco-friendly additive to mitigate ASR in RAC. In this investigation, the authors have conducted cement mortar bar test experiments according to the American Society for Testing and Materials (ASTM 1260) standard, Scanning Electron Microscopy with Energy Dispersive X-ray Spectroscopy (SEM-EDS). Studies have found a higher rate …

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The Effect Of Recycled Pervious Concrete Aggregate Substitution On Properties Of Pervious Concrete, Demet Yavuz Apr 2025

The Effect Of Recycled Pervious Concrete Aggregate Substitution On Properties Of Pervious Concrete, Demet Yavuz

Journal of Sustainable Construction Materials and Technologies

Sustainability has gained significant importance in civil engineering and other areas in recent years. Numerous studies have been conducted on using recycled aggregates to demolish various structures in this context. However, almost all these studies have focused on recycled aggregates from traditional concrete. This study investigated the usability of recycled aggregates obtained from pervious concrete produced in a laboratory environment for use in pervious concrete production. Natural aggregate was substituted with recycled pervious concrete aggregate at weight ratios of 20%, 40%, 60%, 80%, and 100%. The concrete series' compressive, flexural, and splitting tensile strengths, water permeability coefficient, porosity values, and …

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Accelerated Microwave Curing Of Hybrid Geopolymers With Nano-Silica For Enhanced Physico-Mechanical Properties, Bolat Balapanov, Sarsenbek Montayev, Beyza Fahriye Aygün, Mücteba Uysal Apr 2025

Accelerated Microwave Curing Of Hybrid Geopolymers With Nano-Silica For Enhanced Physico-Mechanical Properties, Bolat Balapanov, Sarsenbek Montayev, Beyza Fahriye Aygün, Mücteba Uysal

Journal of Sustainable Construction Materials and Technologies

This paper presents the microwave curing method as an alternative to conventional thermal curing of hybrid (fly ash-slag) geopolymer mortars (GMs) to achieve comparable performance with significantly reduced curing times. This study aimed to ascertain the impact of varying nano-silica contents (0.5%, 0.75%, and 1%) on the geopolymer matrix to identify the optimal dosage for enhancing densification and bond improvement phases. Mixture proportions were designed to achieve high mechanical and durability performances. The activator/binder (A/B) ratio was set at 0.71, the sodium silicate to sodium hydroxide ratio at 1.5, and the sand/binder (S/B) ratio at 2.5. This study considered two …

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Sustainability Beyond The Surface: Evaluating The Long-Term Environmental And Energy Performance Of Selected Cladding Materials For Housing Retrofits, Mark Alegbe, Nasuri Hammed Apr 2025

Sustainability Beyond The Surface: Evaluating The Long-Term Environmental And Energy Performance Of Selected Cladding Materials For Housing Retrofits, Mark Alegbe, Nasuri Hammed

Journal of Sustainable Construction Materials and Technologies

External walls, constituting the largest exposed surface area of the building envelope, face heightened susceptibility to environmental influences. In this study location, aesthetic con- siderations often overshadow environmental impact and comfort requirements in selecting exterior cladding materials. This paper investigates the energy performance, global warming potential, and thermal comfort aspects of carefully selected cladding materials, informed by an exhaustive literature review, for application in retrofit projects in Abuja, Nigeria. Energy con- sumption, carbon emissions, and temperature distributions were simulated using materials in a hypothetical single-floor residential building finished with cement-sand plaster. The findings show that gravel stone exhibits the most …

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Mechanical And Microstructural Properties Of Mortars: Obsidian Powder Effect, Talip Çakmak, Ali Gürbüz, Zafer Kurt, İlker Ustabaş Apr 2025

Mechanical And Microstructural Properties Of Mortars: Obsidian Powder Effect, Talip Çakmak, Ali Gürbüz, Zafer Kurt, İlker Ustabaş

Journal of Sustainable Construction Materials and Technologies

Concrete has been the world's most produced and utilized building material for years due to its economic and easy accessibility. However, it attracts attention due to the CO2 emitted from cement, the raw material of concrete, during the production and consumption stages. Although there are different research studies to reduce this emission, one of the most logical solutions is to use pozzolanic materials with cement and reduce the need for cement. This paper investigated the general material characteristics of mortar samples generated by substituting obsidian pow- der with pozzolanic properties into cement at different ratios by weight. Mortar specimens with …

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Research On The Long-Term Strength Development Of Datça Pozzolan-Based Geopolymer, Kübra Ekiz Barış, Leyla Tanaçan Apr 2025

Research On The Long-Term Strength Development Of Datça Pozzolan-Based Geopolymer, Kübra Ekiz Barış, Leyla Tanaçan

Journal of Sustainable Construction Materials and Technologies

This study examined the influence of long-term curing duration on the properties of geopoly- mers produced through the geopolymerization reaction between Datça Pozzolan and sodium silicate and potassium hydroxide solutions. The specimens were heat cured at 90 °C, 95±5% RH for 24 h initially and then kept under ambient conditions until the tests were conducted at 7, 90, and 365 days. The results showed that applied initial heat curing was appropriate to achieve high early and long-term strength. Geopolymer mortars with 12.5 M and 2.5 activator ratios had the lowest porosity (20.90%) and the highest ultrasound pulse velocity (UPV) (3.10 …

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A Comparative Evaluation Of The Mechanical Properties Of Pet And Polystyrene Modified Asphaltic Concrete Containing Rice Husk Ash Filler., Desmond Ewa, Joseph Ukpata, Anderson Etika, Enang Egbe, Alorye Iduku Apr 2025

A Comparative Evaluation Of The Mechanical Properties Of Pet And Polystyrene Modified Asphaltic Concrete Containing Rice Husk Ash Filler., Desmond Ewa, Joseph Ukpata, Anderson Etika, Enang Egbe, Alorye Iduku

Journal of Sustainable Construction Materials and Technologies

The study evaluated and compared the influence of bitumen modification for sustainable as- phalt using waste plastic (Polyethylene Terephthalate, PET) and waste Polystyrene (PS) at 5–50% modification levels. Rice husk ash (RHA) and desilted sand were used as filler and fine aggregate with crushed granite as coarse aggregate. Tests conducted include; penetration, viscosity, flash point, fire point, specific gravity, ductility and marshal stability test on asphalt. For PET modi- fied-binder a decrease in penetration and ductility was observed while the specific gravity, vis- cosity, flash and fire points of the binder increased. For the PS modified-binder, the penetration, ductility, viscosity …

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A Region-Based Criterion Weighting Approach For The Assessment Of Post-Disaster Shelters, Betül Kavaklı, Savaş Ekinci Apr 2025

A Region-Based Criterion Weighting Approach For The Assessment Of Post-Disaster Shelters, Betül Kavaklı, Savaş Ekinci

Journal of Sustainable Construction Materials and Technologies

The need for shelter after disasters is a common issue, and its planning should occur during the risk management phase, not in the post-disaster process. Following the initial few weeks of emergency aid, the rehabilitation phase comes into play, encompassing the period spent in tem- porary housing units until a transition to permanent housing is achieved. Like the emergency aid phase, this phase cannot be sustained solely by emergency shelter tents due to its extended duration, which is shorter than the time required to construct permanent housing. Specific de- signs suited to the rehabilitation phase are necessary. However, many post-disaster …

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Review On Advances In Bio-Based Admixtures For Concrete, Kidist Bedada, Andrew Nyabuto, Ismael Kınotı, Joseph Marangu Apr 2025

Review On Advances In Bio-Based Admixtures For Concrete, Kidist Bedada, Andrew Nyabuto, Ismael Kınotı, Joseph Marangu

Journal of Sustainable Construction Materials and Technologies

Bio-based admixtures (BBAs) are emerging as a promising class of additives for concrete, of- fering a more sustainable and environmentally friendly alternative to conventional chemical admixtures. Derived from various natural or biological sources, including plants, animals, and microorganisms, BBAs have shown potential in enhancing the performance characteristics of concrete in several key areas. This review article provides an in-depth exploration of BBAs, be- ginning with a detailed classification of the different types of BBAs based on their source mate- rial and production methods. It then delves into the various characterization techniques used to assess the properties and performance of BBAs, …

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The Influence Of Microwave Curing On The Strength Of Silica Fume-Added Fly Ash-Based Geopolymer Mortars, Berivan Yılmazer Polat Apr 2025

The Influence Of Microwave Curing On The Strength Of Silica Fume-Added Fly Ash-Based Geopolymer Mortars, Berivan Yılmazer Polat

Journal of Sustainable Construction Materials and Technologies

Geopolymer concretes a substitute for traditional Portland cement as a more environmentally sustainable alternative. In addition, one of the most significant advantages of geopolymer concrete is the high setting speed that can be achieved with thermal curing, that is, the short curing period. Research on geopolymer concrete has focused on curing, where curing is usually done with conventional ovens. Microwave curing initiates heat generation at the molecular level, which results in a minimal heat increase on the surface of the specimens compared to traditional thermal curing methods. In addition, it provides internal, rapid, and homogeneous heating and rapid strength development. …

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Energy Demand Reduction For Nigeria Housing Stock Through Innovative Materials, Methods And Technologies, Oluwafemi Akande, Chioma Emechebe, Jonam Lembi, Joy Nwokorie Apr 2025

Energy Demand Reduction For Nigeria Housing Stock Through Innovative Materials, Methods And Technologies, Oluwafemi Akande, Chioma Emechebe, Jonam Lembi, Joy Nwokorie

Journal of Sustainable Construction Materials and Technologies

Energy utilisation has recently become a highly sought-after commodity on a global scale. This situation is not limited to Nigeria, where the national grid’s supply of electricity has been severely inadequate. This has hampered the country’s ability to meet the mounting needs of its large population and expanding economy. Aside from the global challenges of rising energy costs and environmental disasters, a number of factors such as a lack of interest in indigenous building technologies and materials have contributed to the Nigerian construction industry’s slow pace of meeting energy demand and achieving energy efficiency. This study investigates the possibility of …

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Strengthening Of Rc Frames With Infill Walls Using High Strength Lightweight Concrete Panels, Hakan Koman Apr 2025

Strengthening Of Rc Frames With Infill Walls Using High Strength Lightweight Concrete Panels, Hakan Koman

Journal of Sustainable Construction Materials and Technologies

This study proposed a practical seismic retrofit method for RC frames. For this purpose, a quasi-static loading was applied to 8 RC frames in finite element analysis software, Abaqus, and frames were pushed 45 mm laterally. High-strength fiber-reinforced lightweight concrete panels strengthened infill walls inside the RC frames. To apply them to the walls, epoxy binder and polyurethane binder were used, and their behavior was compared. Using panels increased the lateral load capacity of the whole frame according to the numerical analysis performed with Abaqus. In the worst case, the retrofitted frame carried approximately two times the traditionally infilled frame's …

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Synthesis Of Macrocyclization Cyclophanes And Their Metal Complexes, Characterization And Antimicrobial Activity, Murat Turkyilmaz, Murat Dönmez, Murat Ates Apr 2025

Synthesis Of Macrocyclization Cyclophanes And Their Metal Complexes, Characterization And Antimicrobial Activity, Murat Turkyilmaz, Murat Dönmez, Murat Ates

Journal of Sustainable Construction Materials and Technologies

Due to their chemical properties, cyclophane-type compounds constitute an interesting organic chemistry class. In the structure of all cyclic compounds, macrocyclization is the most critical issue for high-efficiency synthesis. Especially with a small cyclophane structure, the experimental steps are more complicated than with a prominent cyclophane structure. In this manuscript, three different material groups were applied to synthesize silver cyclophane compounds for smart drug properties. In the first material group, 5,6-dimetil-1H-benzo[d] imidazole (1) and 2,6-bis(chloromethyl)pyridine (2) were reacted to form 5,6-dimethyl-1- ((6-((5,6-dimethyl-1H-benzo[d]imidazole-1-il)methyl)pyridine-2-il)methyl)-1H-benzo[d] imidazole compound (3). In the second material group, ethyl 2-bromoacetate (4) reacted to different nitrogen atoms of the …

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Comparative Evaluation Of Mechanical Performance Of Steel Slag And Earthen Granular Aggregates, Aslı Yalçın Dayıoğlu, Mustafa Hatipoğlu, Ahmet Aydilek Apr 2025

Comparative Evaluation Of Mechanical Performance Of Steel Slag And Earthen Granular Aggregates, Aslı Yalçın Dayıoğlu, Mustafa Hatipoğlu, Ahmet Aydilek

Journal of Sustainable Construction Materials and Technologies

The diminishing quantity of natural resources has resulted in a search for alternative materials. Reusing industrial by-products, such as steel slag, provides opportunities for sustainable highway construction practices due to the valuable space they occupy and the potential environmental impacts when they are stockpiled. In this paper, the mechanical suitability of steel slag as an unbound highway aggregate is investigated, and its performance is compared with that of traditional graded aggregate base (GAB) materials. In order to compare the behavior, three steel slag samples with different aging properties and five aggregate samples from different quarries were employed. The results indicate …

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Determination Of Exterior Material In Sustainable Buildings By Value Engineering Method According To Leed Criteria, Şenay Atabay Apr 2025

Determination Of Exterior Material In Sustainable Buildings By Value Engineering Method According To Leed Criteria, Şenay Atabay

Journal of Sustainable Construction Materials and Technologies

Factors such as the rapid depletion of natural resources and environmental pollution enable us to understand the importance of sustainability better today. With the introduction of the concept of sustainability into the construction sector, the design of buildings according to the environmentally friendly “Green Building” approach has come to the forefront, and various certification systems have been developed. Due to these certification systems, various building materials must be used in buildings. However, since many materials are on the market, it is a problem which materials should be preferred according to the green building criteria. Although there are various approaches in …

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Thermal Conductivity, Abrasion Resistance And Compressive Strength Of End-Of-Life Tire Aggregate Incorporated Concrete, Kasım Mermerdaş, Süleyman İpek, Yusuf Işıker, Alparslan Ulusoy Apr 2025

Thermal Conductivity, Abrasion Resistance And Compressive Strength Of End-Of-Life Tire Aggregate Incorporated Concrete, Kasım Mermerdaş, Süleyman İpek, Yusuf Işıker, Alparslan Ulusoy

Journal of Sustainable Construction Materials and Technologies

Recycling end-of-life tires is a global problem that requires an urgent solution. Storing and preserving these tires is a challenge that delays facing potential problems instead of solving the problem. In this context, recycling waste tires without harming the environment and at low costs has been the focus of many researchers. For several decades, the possibility of grinding these tires to aggregate size for concrete and substituting them with natural aggregate has been the subject of research by scientists working in this field. In this regard, this study aims to experimentally investigate the influence of waste rubber aggregate on some …

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Frp Strengthening Of Rc Structures: Sustainable, Environmental And Structural Evaluations, Ali Cem Yağar, Ceren İnce, Shahram Derogar Apr 2025

Frp Strengthening Of Rc Structures: Sustainable, Environmental And Structural Evaluations, Ali Cem Yağar, Ceren İnce, Shahram Derogar

Journal of Sustainable Construction Materials and Technologies

Strengthening and rehabilitation have been widely implemented for many years to extend the service life of reinforced concrete structures. The paper begins with a comprehensive review of the fiber-reinforced polymers (FRP) utilization on strengthening particularly over the traditional materials formerly used in practice with respect to materials, manufacturing, operation, construction, and maintenance phases, as well as the engineering and environmental performance of such materials. Carbon and Glass FRP, the most frequently used strengthening materials, are particularly designated in the study and are employed to conduct an environmental performance evaluation using the previously published data in the literature. The paper then …

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Effects Of Exfoliation Temperature For Vermiculate Aggregates Modified By Sodium Ions On Thermal And Comfort Properties Of A New Generation Cementitious Mortar, Lütfullah Gündüz, Şevket Onur Kalkan Apr 2025

Effects Of Exfoliation Temperature For Vermiculate Aggregates Modified By Sodium Ions On Thermal And Comfort Properties Of A New Generation Cementitious Mortar, Lütfullah Gündüz, Şevket Onur Kalkan

Journal of Sustainable Construction Materials and Technologies

Vermiculite exfoliation is based on the principle when water between the layers evaporate, and the crystal layers spread out pressured by the steam. As a result, elongated, curved particles are formed. The thermal properties of the final product formed are directly related to this exfoliation amount. In this experimental work, exfoliation characteristic of natural vermiculate is studied. A series of experimental analyzes were carried out to examine the expandability of natural vermiculite at different heating temperatures by the Na+ modification method. In addition, the expansion ratios of Na+-modified and unmodified vermiculite samples were analyzed comparatively. Each of the raw and …

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The Influence Of Anhydrite Iii As Cement Replacement Material In Production Of Lightweight Masonry Blocks For Unreinforced Non-Load Bearing Walls, Şevket Onur Kalkan, Lütfullah Gündüz Apr 2025

The Influence Of Anhydrite Iii As Cement Replacement Material In Production Of Lightweight Masonry Blocks For Unreinforced Non-Load Bearing Walls, Şevket Onur Kalkan, Lütfullah Gündüz

Journal of Sustainable Construction Materials and Technologies

Lightweight cellular hollow concrete (LCHC) block is a type of masonry unit that has excellent thermal and acoustic performance, fire resistance and high weathering resistance, and manufactured by precast technique. This work presents an experimental study, which investigates the effects of volumetric partial replacement of Portland cement by calcium sulfate anhydrite on precast properties, especially hardening time of the products, thermal insulation properties and mechanical properties of the blocks. LCHC block is produced by the mixing of Portland cement (PC), anhydrite III (ANH), expanded perlite (EP), pumice (PU) and calcite (CA) for building applications. The physical and mechanical properties of …

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Influence Of Porosity On The Free Vibration Response Of Sandwich Functionally Graded Porous Beams, Sura Kareem Al-Itbı, Ahmad Reshad Noorı Apr 2025

Influence Of Porosity On The Free Vibration Response Of Sandwich Functionally Graded Porous Beams, Sura Kareem Al-Itbı, Ahmad Reshad Noorı

Journal of Sustainable Construction Materials and Technologies

Functionally graded materials are composite materials used to build a variety of structures. These structures are used in ships industries, marine, automotive, high building structures, energy engineering applications, and many more. The porosity made in these materials may negatively affect some behavior aspects like stiffness, and strength, but it may provide superior performance in other fields like vibration reduction, thermal isolation, energy absorption, and others. In this paper, we will discuss the effect of porosity on the natural frequencies for functionally graded porous (FGP) sandwich beams. The mechanical properties of the FGP sandwich beams are changing with the porosity in …

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Characterization Of Carbon Fiber Reinforced Conductive Mortars Filled With Recycled Ferrochrome Slag Aggregates, Fatih Doğan, Heydar Dehghanpour, Serkan Subaşı, Muhammed Maraşlı Apr 2025

Characterization Of Carbon Fiber Reinforced Conductive Mortars Filled With Recycled Ferrochrome Slag Aggregates, Fatih Doğan, Heydar Dehghanpour, Serkan Subaşı, Muhammed Maraşlı

Journal of Sustainable Construction Materials and Technologies

Recently, it is known that carbon fiber, which is a conductive fiber, is used in different mixture designs and developing electrically conductive cementitious materials. However, the evaluation of ferrochrome as a recycled aggregate in the mixture of these special concretes has still not been investigated. In this study, electrically conductive mortars were produced by using 100% recycled ferrochrome aggregate with a particle size of less than 1 mm as filling material and using carbon fiber (CF) in 4 different ratios, 0%, 0.5%, 0.75% and 1%. 2, 14, 28, 90 and 180 days electrical resistivity properties of the obtained samples were …

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Effect Of Fiber Type, Shape And Volume Fraction On Mechanical And Flexural Properties Of Concrete, Mahmut Başsürücü, Cenk Fenerli, Ceren Kına, Şadiye Defne Akbaş Apr 2025

Effect Of Fiber Type, Shape And Volume Fraction On Mechanical And Flexural Properties Of Concrete, Mahmut Başsürücü, Cenk Fenerli, Ceren Kına, Şadiye Defne Akbaş

Journal of Sustainable Construction Materials and Technologies

An experimental study was herein presented focusing the effect of different type, shape and volume fraction of fibers on the hardened properties of concrete including compressive, splitting tensile and flexural strengths at 7 and 28 curing days. A control concrete mixture with no fiber was prepared and six fiber reinforced concrete mixtures were designed by using two different types of fibers which were steel fibers with different shapes (short straight and hooked end) and polypropylene fiber with the volume fraction of 0.4% and 0.8%. The load-deflection curves and toughness of the specimens were analyzed based on ASTM C1609. The results …

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