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Current Construction And Demolition Waste Management Strategies For Philippine Construction Sector – A Systematic Literature Review, Erold Dimaculangan Apr 2025

Current Construction And Demolition Waste Management Strategies For Philippine Construction Sector – A Systematic Literature Review, Erold Dimaculangan

Journal of Sustainable Construction Materials and Technologies

The construction industry continues to be one of the primary drivers of a country's economic progress. As of 2022, the Philippines’ construction sector had an annual growth rate of 9.2% and continues to increase due to the Build! Build! Build! (BBB) program. However, the construction sector is globally known for regularly consuming more raw materials, resulting in natural resource scarcity and environmental implications. Construction activities also generated a massive volume of construction waste from construction, demolition, and renovation. The need to impose construction and demolition waste (CDW) management strategies and policies in all stages of construction is crucial in attaining …

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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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Use Of Pumice Aggregate In Cementitious Rheoplastic Lightweight Concrete, Lütfullah Gündüz, Şevket Onur Kalkan Apr 2025

Use Of Pumice Aggregate In Cementitious Rheoplastic Lightweight Concrete, Lütfullah Gündüz, Şevket Onur Kalkan

Journal of Sustainable Construction Materials and Technologies

Rheoplastic lightweight concrete (RLC) is generally designed for pumping applications as fluid concrete free from segregation. Concrete is produced using polymeric admixtures to enhance concrete workability, strength, drying shrinkage, and durability. This research investigated the suitability of natural porous pumice aggregates in Turkey to obtain rheoplastic lightweight concrete with cement content in normal ranges. To produce and experience rheoplastic concrete mix design data, rheoplastic lightweight concrete mixes were tested with fine pumice aggregate (FPA) and coarse pumice aggregate (CPA) supplied from the Nevşehir region of Turkey. For rheoplastic lightweight concrete with cement contents in the 250 to 400 kg/m3 range, …

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Pattern And Filament Optimization For 3d-Printed Reinforcements To Enhance The Flexural Behavior Of Cement-Based Composites, Eren Gödek, Seyfi Şevik, Özgür Özdilli Apr 2025

Pattern And Filament Optimization For 3d-Printed Reinforcements To Enhance The Flexural Behavior Of Cement-Based Composites, Eren Gödek, Seyfi Şevik, Özgür Özdilli

Journal of Sustainable Construction Materials and Technologies

Cement-based materials are the world's most widely utilized construction materials due to their high compressive strength. However, they need reinforcement to withstand direct or indirect tensile forces. This study evaluated the potential use of 3D-printed polymers as an alternative reinforcement in cement-based composites. Polyethylene terephthalate glycol (PETG), Polyamide (PA), and Acrylonitrile butadiene styrene (ABS) based triangular and honeycomb-patterned 3D-printed reinforcements were incorporated into cement-based composites, and their mechanical performances were compared under three-point flexural tests by considering both polymer and pattern type. Both triangular and honeycomb patterns enhanced flexural behavior. Considering all filaments, the honeycomb pattern was found more effective …

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Assessment Of Iron Tailings As Replacement For Fine Aggregate In Engineering Application, Ayodele Owolabı, Gideon Ajiboye, Catherine Ikumapayi, Sunmbo Akande Apr 2025

Assessment Of Iron Tailings As Replacement For Fine Aggregate In Engineering Application, Ayodele Owolabı, Gideon Ajiboye, Catherine Ikumapayi, Sunmbo Akande

Journal of Sustainable Construction Materials and Technologies

This study evaluated the suitability of iron tailings as fine aggregate replacements for engineering applications. This is necessary to find economic usage for the enormous amount of waste from Itakpe mines. The physical properties of specific gravity, bulk density, moisture content, particle size, fineness modulus, and mechanical properties in terms of compressive strength, compaction factor, flexural strength, and relative density of the concrete made with iron tailings were determined. World Health Organization (WHO) standard methods for examining water and wastewater were used to analyze water used for curing the concrete cubes and beams to ascertain toxicity. The result shows the …

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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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Fabrication Of Superhydrophilic Teos-Lactic Acid Composite Films And Investigation Of Biofouling Behaviour, Tuğçe Ervan, Mehmet Ali Küçüker, Uğur Cengiz Apr 2025

Fabrication Of Superhydrophilic Teos-Lactic Acid Composite Films And Investigation Of Biofouling Behaviour, Tuğçe Ervan, Mehmet Ali Küçüker, Uğur Cengiz

Journal of Sustainable Construction Materials and Technologies

Phytoplankton and diatom microalgae species cause biofouling by adhering to the surfaces, especially in closed cultivation systems such as tubular photobioreactors. This biofilm formation blocks the sunlight; after harvesting, it is necessary to clean the reactor. This cleaning process causes loss not only for time and finance but also in terms of environmental pollution due to using toxic chemicals and excess water usage. This study aimed to investigate the reduction of the microorganism cell adhesion on the hybrid surface. To succeed in this, the composite surface of tetraethoxysilane (TEOS) and lactic acid (LA) was prepared by the sol-gel process. Then …

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Production And Characterization Of Heat Retardant Fiber-Reinforced Geopolymer Plates, Türkan Gezer, Gürkan Akarken, Uğur Cengiz Apr 2025

Production And Characterization Of Heat Retardant Fiber-Reinforced Geopolymer Plates, Türkan Gezer, Gürkan Akarken, Uğur Cengiz

Journal of Sustainable Construction Materials and Technologies

This paper presents an alternative environment-friendly thermal insulation material for the construction industry. We aimed to produce this building material with superior heat resistance properties and comparable strength to the concrete produced with Ordinary Portland Cement. The primary purpose of the experimental studies is to produce a basic geopolymeric plate and to add cellubor and polypropylene fibers to the geopolymeric mortar. In the next stage, fiber-reinforced plates were prepared, thermal experiments were carried out, and discussions and conclusions were formed according to the results and findings. This study initially produced different types of fiber-based metakaolin plates with high heat resistance. …

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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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A Review On Selected Durability Parameters On Performance Of Geopolymers Containing Industrial By-Products, Agro- Wastes And Natural Pozzolan, Festus Ngui, Najya Muhammed, Fredrick Mulei Mutunga, Joseph Marangu, Ismael Kithinji Kınotı Apr 2025

A Review On Selected Durability Parameters On Performance Of Geopolymers Containing Industrial By-Products, Agro- Wastes And Natural Pozzolan, Festus Ngui, Najya Muhammed, Fredrick Mulei Mutunga, Joseph Marangu, Ismael Kithinji Kınotı

Journal of Sustainable Construction Materials and Technologies

The applications of geopolymers as cementitious systems are becoming an alternative source of cement daily. The use of potentially suitable aluminosilicate inorganic waste materials incorporated with agro-industrial waste in the production of suitable geopolymer binders has been reported. Calcined clay and some agro-waste ash, such as coconut shells, are examples of aluminosilicate materials that exhibit strong pozzolanic activity because of their high silica-alumina composition. The pozzolanic reaction is primarily caused by the amorphous silica present in properly burned agricultural waste and clay. Based on a variety of available literature on concrete and mortar including geopolymers synthesized from agro-industrial waste, a …

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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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Effects Of Single-Walled Carbon Nanotubes And Steel Fiber On Recycled Ferrochrome Filled Electrical Conductive Mortars, Heydar Dehghanpour, Fatih Doğan, Serkan Subaşı, Muhammed Maraşlı Apr 2025

Effects Of Single-Walled Carbon Nanotubes And Steel Fiber On Recycled Ferrochrome Filled Electrical Conductive Mortars, Heydar Dehghanpour, Fatih Doğan, Serkan Subaşı, Muhammed Maraşlı

Journal of Sustainable Construction Materials and Technologies

The production of electrically conductive concrete was introduced years ago among construction materials, generally for anti-icing. The present study investigates the electrical, mechanical, dynamic, and microstructural properties of recycled ferrochrome filled cementitious mortars, containing single-walled carbon nanotubes (SWCNTs) and steel fiber. 7, 14, and 28-day non-destructive and 28-day compressive and bending tests of cementitious conductive mortars obtained from five different mixtures were performed. Two-point uniaxial method was used to determine the electrical conductivity properties of the samples. The damping ratio of the samples was obtained by performing dynamic resonance tests. Ultrasound pulse velocity (UPV) and Leeb hardness tests were performed …

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Structural Performance Of Concrete Reinforced With Banana And Orange Peel Fibers -A Review, Abiodun Kilani, Ademilade Olubambi, Bolanle Ikotun, Oluwatobi Adeleke, Oluwaseun Adetayo Apr 2025

Structural Performance Of Concrete Reinforced With Banana And Orange Peel Fibers -A Review, Abiodun Kilani, Ademilade Olubambi, Bolanle Ikotun, Oluwatobi Adeleke, Oluwaseun Adetayo

Journal of Sustainable Construction Materials and Technologies

In recent years, there has been a surge in interest in developing novel materials for sustainable building construction made from renewable resources. The use of natural fibers in concrete reinforcement, as opposed to agricultural waste, has significant environmental benefits in terms of reducing the environmental repercussions of the continuous dumping and landfilling of massive amounts of agricultural waste in overburdened landfill sites. Banana peel fiber (BPF) and orange peel fiber (OPF) are common agro-wastes with a long history of use in concrete as an additive or a cement substitute. However, their efficiency and performance in terms of reinforcement must be …

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A Survey On The Relationships Between Compression Index, Coefficient Of Consolidation, And Atterberg Limits, Kaveh Dehghanıan, Sirin Ozkan Ipek Apr 2025

A Survey On The Relationships Between Compression Index, Coefficient Of Consolidation, And Atterberg Limits, Kaveh Dehghanıan, Sirin Ozkan Ipek

Journal of Sustainable Construction Materials and Technologies

Correlations between compression index and atterberg limits found in the literature are very important for preliminary estimation. These equations are usually interpreted based on the R-square parameter and classified according to the conditions of the data (disturbed, undisturbed, remoulded, etc.). Although correlations reliable enough to eliminate oedometer tests are not yet fully available, these correlations can be useful in local calculations. In this study, correlations obtained from studies conducted after 2000 on the relationship of compression index and consolidation coefficient with atterberg limits and water content are mentioned and clearly shown. While the compression index equations are quite high 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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Bibliographic Analysis On 3d Printing In The Building And Construction Industry: Printing Systems, Material Properties, Challenges, And Future Trends, Qamar Shahzad, Muhammad Umair, Saad Waqar Apr 2025

Bibliographic Analysis On 3d Printing In The Building And Construction Industry: Printing Systems, Material Properties, Challenges, And Future Trends, Qamar Shahzad, Muhammad Umair, Saad Waqar

Journal of Sustainable Construction Materials and Technologies

In recent years, significant advancements in the development of large-scale 3D printers and construction materials have been made to meet the demand for industrial scale 3D printing construction. It is significant to construct the buildings and structural components by using 3D concrete printing. Additive manufacturing (AM) main benefits are freedom of design, construction waste reduction, mass customization, and ability to manufacture the complex structures. The major issues including the optimization of printing material which possess the suitable properties for 3D concrete printing. However, this technology towards the green building construction seems to improve the conventional methods by reducing the requirement …

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An Evaluation Of Vertical Dynamic Stress Attenuation For Compacted Coarse-Grained Soils, Kuangbiao Sun, Mingjing Fang, Donglin Shu, Yang Pu, Wenbing Wang Apr 2025

An Evaluation Of Vertical Dynamic Stress Attenuation For Compacted Coarse-Grained Soils, Kuangbiao Sun, Mingjing Fang, Donglin Shu, Yang Pu, Wenbing Wang

Journal of Sustainable Construction Materials and Technologies

Coarse-grained soil (CGS), as a filler with the characteristics of high bearing capacity but difficult compaction for embankment construction, requires an appropriate thickness of a single compaction layer according to the influence depth of vertical dynamic stress. In this paper, a numerical analysis using PFC2D was conducted by following a scale model test with different particle gradations of compacted CGS fillers by adopting a modified PFWD. The results show that the influence depth is about 50 cm under the impact maximum stress 0.066 MPa if defined the depth as the maximum stress attenuation to 20%. The compacted CGS filler with …

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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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Natural Pozzolan-Based Green Geopolymer Foam For Thermal Insulation, Kübra Ekiz Barış, Leyla Tanaçan Apr 2025

Natural Pozzolan-Based Green Geopolymer Foam For Thermal Insulation, Kübra Ekiz Barış, Leyla Tanaçan

Journal of Sustainable Construction Materials and Technologies

The purpose of the current study is to investigate the possibility of volcanic Tuff of Earth of Datça (ED) in Turkey to be used as an aluminosilicate source in the production of a geopolymer foam for thermal insulation. An extensive evaluation of the effects of fine sand-to-pozzolan and Al powder-to-pozzolan ratios on the physical, mechanical, and thermal properties and morphology (porosity, average and maximum pore diameter, pore size distribution) of the pores were carried out. The sodium silicate and potassium hydroxide (12.5 M) solutions with an activator ratio of 2.5 were used as alkali activators and Al powder was used …

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Effect Of Thermal Variances On Flexible Pavements, Michael Toryila Tiza, Kavnen Jirgba, Habibu Abubakar Sani, Terlumun Sesugh Apr 2025

Effect Of Thermal Variances On Flexible Pavements, Michael Toryila Tiza, Kavnen Jirgba, Habibu Abubakar Sani, Terlumun Sesugh

Journal of Sustainable Construction Materials and Technologies

This article presents recent findings on the effect of thermal variances on pavements. The study presents findings from different researchers and groups across the globe. The study covers temperature measurement in asphalt pavement, history of asphalt pavement temperature prediction models, determination of asphalt layer depth temperature, main factors contributing to temperature variations of asphaltic pavement, energy balance in flexible pavements, asphalt pavement design incorporating the temperature factor, the effect of temperature on the structural performance of asphalt pavement climate and environmental factors. Summarily, the study deduced that temperature has a reasonably substantial effect on the asphalt pavement layer's mechanical and …

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A Review On Engineering Biocomposites And Natural Fiber-Reinforced Materials, Ataberk Baysal, Paşa Yayla, Halit Süleyman Türkmen Apr 2025

A Review On Engineering Biocomposites And Natural Fiber-Reinforced Materials, Ataberk Baysal, Paşa Yayla, Halit Süleyman Türkmen

Journal of Sustainable Construction Materials and Technologies

Fiber-reinforced polymer composites are well-studied and established products and today they are being used in different industrial and non-industrial areas. However, the increased interest in recyclability and the concerns about climate change caused materials scientists to look for a non-petroleum-based alternative to synthetic fibers and polymers. Since the beginning of this century, natural fibers and biopolymers have seen an increased interest each year for composite applications. Thanks to this interest, the studies on natural fibers and biopolymers have increased significantly. Despite the high number of studies on natural fibers and natural fiber-reinforced polymers (NFRP), there are gaps in the literature. …

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Assessment Of The Adoption Of 3d Printing Technology For Construction Delivery: A Case Study Of Lagos State, Nigeria, Akintayo Opawole, Betty Oluwafunso Olojede, Kahilu Kajimo-Shakantu Apr 2025

Assessment Of The Adoption Of 3d Printing Technology For Construction Delivery: A Case Study Of Lagos State, Nigeria, Akintayo Opawole, Betty Oluwafunso Olojede, Kahilu Kajimo-Shakantu

Journal of Sustainable Construction Materials and Technologies

The innovations of the fourth industrial revolution (industry 4.0) encouraged the application of 3D printing technology to complement and subsequently replace the conventional construction method. This study assessed the awareness, application, drivers and barriers to the adoption of 3D printing technology for construction with a view to enhancing faster and sustainable construction process. Primary data were obtained with the use of structured questionnaires which were self-administered to medium and small-sized construction firms/contractors in Lagos State. Data collected were analyzed using descriptive and inferential statistics. The study established that the awareness and application levels of the technology are still very low. …

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Performance Of Dredged Sediments Based Controlled Low-Strength Material, Pranshoo Solanki Apr 2025

Performance Of Dredged Sediments Based Controlled Low-Strength Material, Pranshoo Solanki

Journal of Sustainable Construction Materials and Technologies

The process of depleting the natural sources of virgin sand and aggregate makes it challenging to satisfy the demand for construction work. Therefore, in a context of sustainable construction, this study examined the feasibility of utilizing dredged sediments (DS) as a substitute for sand in non-structural controlled low-strength materials (CLSM). A total of two types of dredged sediments, coarser and finer, were collected from two different sources. Then, nine CLSM mixtures were prepared by using different proportions of natural sand (virgin sand) and dredged sediments. Each mixture was tested for flowability, unconfined compressive strength, density and excavatability. Flow consistency decreased …

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Effect Of Cement And Lime On Strength And High-Temperature Resistance Of Class F And C Fly Ash-Based Geopolymer Mortars, Işılay Özkul, Adil Gültekin, Kambiz Ramyar Apr 2025

Effect Of Cement And Lime On Strength And High-Temperature Resistance Of Class F And C Fly Ash-Based Geopolymer Mortars, Işılay Özkul, Adil Gültekin, Kambiz Ramyar

Journal of Sustainable Construction Materials and Technologies

Geopolymers have advantages such as good high-temperature, acid and sulfate resistance. Recently, researchers have been working on cement-geopolymer hybrid materials. According to these studies, it is possible to adjust the setting times, to gain strength at ambient temperature and to increase the strength with the use of cement. However, it is known that the structural stability of cement deteriorates at high temperatures, lowering its strength. In this study, the effect of slaked lime and cement inclusion on the strength and high-temperature resistance of Class F and Class C fly ash-based geopolymer mortars was investigated. For this purpose, fly ash was …

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Numerical Investigation Of Precast Reinforced Concrete Beam–To–Column Joints By Replaceable Damper, Yalda Dehqan Nezhad, Sepanta Naimi Apr 2025

Numerical Investigation Of Precast Reinforced Concrete Beam–To–Column Joints By Replaceable Damper, Yalda Dehqan Nezhad, Sepanta Naimi

Journal of Sustainable Construction Materials and Technologies

This study aimed to investigate the precast reinforced concrete beam-to-column joints behaviors through the replaceable damper under cyclic loading. The precast concrete specimens have been embedded with steel reinforcement and specially shaped connectors. After the application of the replaceable damper under cyclic loading, the energy dissipation part has acted very well and increased the bearing capacity of precast specimens. The precast concrete beam–to–column joints were designed and analyzed to compare with the reinforced concrete (RC) specimen. The analysis result of the loading based on the controlled displacement method has illustrated that the precast specimen model with damper has shown a …

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Numerical Analysis Of Flexural And Shear Behaviors Of Geopolymer Concrete Beams, Ali İhsan Çelik, Ahmet Özbayrak, Ahmet Şener, Mehmet Cemal Acar Apr 2025

Numerical Analysis Of Flexural And Shear Behaviors Of Geopolymer Concrete Beams, Ali İhsan Çelik, Ahmet Özbayrak, Ahmet Şener, Mehmet Cemal Acar

Journal of Sustainable Construction Materials and Technologies

Geopolymer concrete (GPC) is obtained by activating industrial wastes such as fly ash with chemical liquids such as sodium hydroxide (NaOH) and sodium silicate (Na2 SiO3). In order to use environmentally friendly GPC obtained from industrial wastes instead of portland cement concrete (OPC), its behavior in structural elements is important and should be investigated in detail. Load-displacement characteristics, flexural and shear stiffnesses and crack development of samples were obtained by numerical analysis. The GPC beams to be an alternative to OPC beams, their mechanical properties and fracture modes must be at least as much as OPC. As a result of …

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Analysis Of Alternative Sustainable Approach To Concrete Mixture Design, Rebecca Babcock, Talat Salama Apr 2025

Analysis Of Alternative Sustainable Approach To Concrete Mixture Design, Rebecca Babcock, Talat Salama

Journal of Sustainable Construction Materials and Technologies

Sustainability is a growing area of concern, especially amid the concrete industry. Concrete, especially traditional concrete, which contains Portland cement, is extremely harmful to the environment producing mass amounts of carbon dioxide. Additionally, the harvesting of these materials, like lime, cause significant damage to waterways and the ecosystem. For years, studies have found numerous, more sustainable, alternatives that are structurally equivalent to traditional concrete. The Connecticut Department of Transportation does allow for the use of alternative “green” concretes as long as the mix designs meet the required specifications. Nevertheless, heavy highway construction seems reluctant to dabble with new substances and …

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Engineering Properties And Sem Analysis Of Eco-Friendly Geopolymer Mortar Produced With Crumb Rubber, Süleyman İpek, Kasım Mermerdaş Apr 2025

Engineering Properties And Sem Analysis Of Eco-Friendly Geopolymer Mortar Produced With Crumb Rubber, Süleyman İpek, Kasım Mermerdaş

Journal of Sustainable Construction Materials and Technologies

In the present study, the influence of the crumb rubber utilization as fine aggregate on the engineering properties of fly ash-based geopolymer mortar was experimentally investigated. In this context, the natural sand used in the production of geopolymer mortars was substituted with the crumb rubber, which comes out in the course of applying the retreading process to the end-of-life tires, at the substitution levels of 10%, 20%, 30%, 40%, and 50% by volume of aggregate content. In this way, 6 different geopolymer mixtures, one of which was the control mixture, were designed and produced. Then, the effect of crumb rubber …

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