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Accelerated Alkali-Silica Reaction After A Seven-Year Asr-Dormancy Period, Ahsanollah Beglarigale Apr 2025

Accelerated Alkali-Silica Reaction After A Seven-Year Asr-Dormancy Period, Ahsanollah Beglarigale

Journal of Sustainable Construction Materials and Technologies

The ongoing alkali-silica reaction (ASR) in concrete can be halted by dryness, which is important for repairing ASR-suffered concrete structures. Drying of the concrete establishes an ASR-dormancy period until the end of the dryness. The residual expansion of such concrete after the ingress of water—the end of the dormancy period is a significant risk, especially for repair works. In this experimental study, the post-dormancy expansion of various mixtures prepared by eight different Portland cement and three different supplementary cementitious materials (SCM) were tested using an accelerated mortar bar test. After accelerated ASR ex- pansions, an ASR-dormancy period was established by …

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Effect Of Sealed Water Curing And Fiber Length On Compressive Strength And Fracture Energy Of Fly Ash-Based Geopolymer Mortars, Adil Gültekin Apr 2025

Effect Of Sealed Water Curing And Fiber Length On Compressive Strength And Fracture Energy Of Fly Ash-Based Geopolymer Mortars, Adil Gültekin

Journal of Sustainable Construction Materials and Technologies

n this study, the effect of the curing method and polyvinyl alcohol (PVA) fiber inclusion on some engineering properties of fly ash-based geopolymer mortars was examined. In this context, six fly ash-based mortars were produced using sodium hydroxide and sodium silicate solution. The fracture energy values were determined with notched samples of 50×50×240mm dimensions, and a clip-on gage was used to measure the crack mouth opening displacements. The notch width and notch height were 3 mm and 10 mm, respectively. Specimens were cured in hot water (80 °C) for 18 hours. Before curing, one series of samples was sealed with …

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Strength And Durability Performance Of Hybrid Alkaline Clay Brick Waste –Coconut Shell Ash Cement, Festus Ngui, Victor Kiptoo Mutai, Najya Muhammed, Fredrick Mulei Mutunga, Joseph Mwiti Marangu, Mike Otieno Apr 2025

Strength And Durability Performance Of Hybrid Alkaline Clay Brick Waste –Coconut Shell Ash Cement, Festus Ngui, Victor Kiptoo Mutai, Najya Muhammed, Fredrick Mulei Mutunga, Joseph Mwiti Marangu, Mike Otieno

Journal of Sustainable Construction Materials and Technologies

Hybrid Alkaline Cement (HAC) has the potential to reduce carbon dioxide (CO2) and improve concrete structure. The durability of a hybrid alkaline mortar made from a mixture of calcined clay brick waste (CBW) and coconut shell ash (CSA) was compared with that of ordinary Portland cement (OPC) and pozzolanic Portland cement (PPC), which are the two common types of Portland cement. In an open furnace, CSA was obtained by burning coconut shells collected from Kilifi County, Kenya. At the same time, CBW was sampled from brick production and construction sites in Kibwezi sub-county, Kenya, and ground using a laboratory ball …

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One-Part Alkali-Activated Mortars Based On Clay Brick Waste, Natural Pozzolan Waste, And Marble Powder Waste, Kübra Ekiz Barış Apr 2025

One-Part Alkali-Activated Mortars Based On Clay Brick Waste, Natural Pozzolan Waste, And Marble Powder Waste, Kübra Ekiz Barış

Journal of Sustainable Construction Materials and Technologies

In Türkiye, waste clay bricks (WCB) comprise significant construction and demolition waste. Most research is based on producing WCB-based two-part alkali-activated materials (AAM). Compared to their conventional, two-part alkali-activated counterparts, one-part AAM offers several advantages, such as being more practical, safe, and easy to use. Thus, they may be an excellent choice for commercial construction applications and on-site casting. However, research data on producing WCB-based one-part alkali-activated mortars is limited. The relatively low reactivity of WCB can be increased by replacing WCB with ground granulated blast-furnace slag (GGBS) and fly ash (FA). Unlike these by-products, Nevşehir pozzolan (NP) and marble …

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Clustering Analysis Of Compressive Strength Of Structural Recycled Aggregate Concrete, Hasan Dilbas, Mehmet Şamil Güneş Apr 2025

Clustering Analysis Of Compressive Strength Of Structural Recycled Aggregate Concrete, Hasan Dilbas, Mehmet Şamil Güneş

Journal of Sustainable Construction Materials and Technologies

Clustering analysis primarily highlights the in homogeneity of data and can be utilized in structural engineering to demonstrate strength irregularity. It is well-known that strength irregularity between neighboring floors within a structure or among structural elements can lead to non-holistic behavior. Therefore, the clustering of compressive strength holds significant importance. Despite the relevance, only a few studies have addressed the clustering of compressive strength in recycled aggregate concrete (RAC) and proposed potential solutions for clustering issues. This paper aims to investigate the clustering of compressive strength in RAC and explore viable solutions. In this experimental study, four concrete groups were …

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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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Moderating The Soft Storey Impact In Multi-Storey Buildings: A Comparative Seismic Investigation, Shabla K, K.I. Praseeda, Chıtaranjan Pany Apr 2025

Moderating The Soft Storey Impact In Multi-Storey Buildings: A Comparative Seismic Investigation, Shabla K, K.I. Praseeda, Chıtaranjan Pany

Journal of Sustainable Construction Materials and Technologies

A storey with lateral stiffness less than 70% of the storey above or less than 80% of the average stiffness of the three storeys above is considered a soft storey. Ground-floor open-air buildings are frequently used for parking, particularly in metropolitan settings with considerable space limits. Soft-story buildings with irregular stiffness tend to collapse more than conventional buildings. The study's main goal was to understand better the soft storey effect in multi-storey structures and how to mitigate it using strategies such as adding shear walls, bracings, viscous dampers, and stiffer columns. A G+14 storey building finite element model (FEM) has …

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Sustainability Evaluation Of Highway Sign Support By Field Testing And Finite Element Analysis, Talat Salama, Drew Voghel Apr 2025

Sustainability Evaluation Of Highway Sign Support By Field Testing And Finite Element Analysis, Talat Salama, Drew Voghel

Journal of Sustainable Construction Materials and Technologies

The primary objective of this study is to evaluate the sustainability of highway sign supports through field testing and finite element analysis. The study aims to develop a predictive maintenance model to evaluate the service life of these structures. Sign support systems are important structures in the Connecticut Department of Transportation (CTDOT) bridge management system. Periodic sustainability inspections and maintenance activities are needed as a long-term, cost-effective maintenance strategy. The research involved non-destructive field testing of a cantilever-type highway sign support, followed by finite element modeling using Highway Sign Structures Engineering (HSE) by SAFI software. Data from accelerometers, strain gauges, …

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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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Thermophysical, Strength, And Electrical Properties Of Clay Modified With Groundnut Shell Ash For Building Purposes, Joseph Bassey Emah, Abayomi Ayodeji Edema, Sylvester Andrew Ekong, David Adeniran Oyegoke, Ubong Williams Robert Apr 2025

Thermophysical, Strength, And Electrical Properties Of Clay Modified With Groundnut Shell Ash For Building Purposes, Joseph Bassey Emah, Abayomi Ayodeji Edema, Sylvester Andrew Ekong, David Adeniran Oyegoke, Ubong Williams Robert

Journal of Sustainable Construction Materials and Technologies

This study investigated the effects of Groundnut Shell Ash (GSA) on clay samples for making sustainable and low-cost building materials. The clay GSA composites' physical, chemical, thermal, and mechanical properties were evaluated to assess their suitability for construction. The results revealed that the addition of GSA to the clay matrix had a significant impact on various properties of the samples. The physical characterization showed that GSA was finer and lighter than clay, making the composites more flowable. Chemical analysis indicated that clay and GSA were rich in SiO2, Al2O3, and Fe2O3, with the clay exhibiting high SiO2 content suitable for …

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High Temperature Performance Of Geopolymer: Contribution Of Boron Tincal Waste, Zinnur Çelik, Emrah Turan, Meral Oltulu Apr 2025

High Temperature Performance Of Geopolymer: Contribution Of Boron Tincal Waste, Zinnur Çelik, Emrah Turan, Meral Oltulu

Journal of Sustainable Construction Materials and Technologies

The world's largest boron deposits are in Turkey, Russia, and the U.S.A. Türkiye holds about 73% of the world's reserves of oil. The tincal mineral accounts for approximately 25.3% of Türkiye's boron reserves. Annually, around 900,000 tons of boron-derived waste are produced to obtain 1 million tons of borax pentahydrate from the tincal mine. This waste is stored in pools, causing considerable environmental issues. This study investigates the potential use of tincal waste, an environmental problem, in cement and concrete applications. Tincal waste (T.W.) was utilized to produce geopolymer mortar. Geopolymer samples were created by replacing ground blast furnace slag …

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A Study On The Influence Of Material Gradient Index On Bending And Stress Responses Of Fgm Rectangular Plates Using The Finite Element Method, Masihullah Noori, Ayça Bilgin, Hamza Diallo, Mohammad Omar Al Rousan, Ahmad Reshad Noorı Apr 2025

A Study On The Influence Of Material Gradient Index On Bending And Stress Responses Of Fgm Rectangular Plates Using The Finite Element Method, Masihullah Noori, Ayça Bilgin, Hamza Diallo, Mohammad Omar Al Rousan, Ahmad Reshad Noorı

Journal of Sustainable Construction Materials and Technologies

Functionally graded materials (FGMs) are advanced materials designed to achieve specific property gradients. The unique characteristic of these materials—variations in spatial dimensions—allows for integrating the advantages of different materials within a single component, where a combination of properties, such as mechanical strength, thermal resistance, and others, is needed. This paper utilizes finite element analysis to examine the deflection and stress responses of FGM rectangular plates with different material gradient profiles. Various boundary conditions, including clamped, simply supported, and free edges in different configurations, are considered. The plates are subjected to uniformly distributed, sinusoidally distributed, and concentrated loads. The study investigates …

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Sustainable Geopolymer Concrete For Pavements: Performance Evaluation Of Recycled Concrete Aggregates In Fly Ash-Based Mixtures, B. Naga Malleswara Rao, Chereddy Sonali Sri Durga, Chava Venkatesh, T. Muralidhara Rao Apr 2025

Sustainable Geopolymer Concrete For Pavements: Performance Evaluation Of Recycled Concrete Aggregates In Fly Ash-Based Mixtures, B. Naga Malleswara Rao, Chereddy Sonali Sri Durga, Chava Venkatesh, T. Muralidhara Rao

Journal of Sustainable Construction Materials and Technologies

This study investigates the feasibility of incorporating recycled concrete aggregates (RCA) into fly ash-based geopolymer concrete for sustainable pavement applications. The research evaluates RCA’s physical and mechanical properties compared to virgin coarse aggregates (VCA) and assesses the performance of geopolymer concrete mixtures with up to 40% RCA replacement. Aggregate characterization revealed that RCA exhibited higher water absorption (4.39%), crushing value (20.9%), impact value (28.2%), and abrasion value (26.1%) compared to VCA, yet these values remained within acceptable limits for pavement applications. Geopolymer concrete specimens were tested for compressive strength, water absorption, abrasion resistance, and chloride ion permeability. Results indicated that …

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Experimental Investigation Of Mechanical And Physical Properties Of Glass Fiber Reinforced Concretes Produced With Different Magnetized Waters, Serkan Subaşı, Doğu Ramazanoğlu, Muhammed Maraşlı, Volkan Ozdal, Yasemin Hatipoğlu, Heydar Dehghanpour Apr 2025

Experimental Investigation Of Mechanical And Physical Properties Of Glass Fiber Reinforced Concretes Produced With Different Magnetized Waters, Serkan Subaşı, Doğu Ramazanoğlu, Muhammed Maraşlı, Volkan Ozdal, Yasemin Hatipoğlu, Heydar Dehghanpour

Journal of Sustainable Construction Materials and Technologies

Magnetized water may act as a thickener in cementitious mixtures due to its slippery effect. Therefore, it can be beneficial for the mixture to settle easily and to improve its strength. This study investigated the effects of magnetized water passing through pipes with magnetic field intensity (MFI) 8 and 10 on glass fiber reinforced concrete (GFRC). Three different mixtures, the GFRC mixture produced with regular tap water, were obtained, and the properties of the produced GFRC samples, such as 7, 14, and 28 days H-Leeb hardness, density, Ultrasonic pulse velocity (UPV), flexural strength, compressive strength, and fracture mechanics were investigated. …

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Replacement Of Conventional Aggregates And Fillers With Steel Slag And Palm Kernel Shell Ash In Dense-Graded Asphalt Mixtures, Collins A. Nketiah, Kenneth A. Tutu, Ebenezer D. A. Barnor, David A. Azong-Bil Apr 2025

Replacement Of Conventional Aggregates And Fillers With Steel Slag And Palm Kernel Shell Ash In Dense-Graded Asphalt Mixtures, Collins A. Nketiah, Kenneth A. Tutu, Ebenezer D. A. Barnor, David A. Azong-Bil

Journal of Sustainable Construction Materials and Technologies

Large quantities of steel slag and palm kernel shell ash (PKSA) – waste products from steel production and palm oil milling, respectively – are generated annually in several countries, and their disposal is challenging. Meanwhile, the over-reliance on conventional rock aggregates for asphalt mixture production poses increasing sustainability challenges. This study investigated the potential of entirely replacing granite aggregates with steel slag and PKSA in a dense-graded asphalt mixture. Two sets of asphalt mixtures were prepared; the control mixture contained crushed granite aggregate and hydrated lime, while the other set incorporated steel slag as coarse aggregate and PKSA as fine …

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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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Optimizing Seismic Performance: Integrating Friction Dampers Into Spherical Liquid Tanks, Yunus Uçar, Mehmet Fatih Altan Apr 2025

Optimizing Seismic Performance: Integrating Friction Dampers Into Spherical Liquid Tanks, Yunus Uçar, Mehmet Fatih Altan

Journal of Sustainable Construction Materials and Technologies

This study addresses the vital challenge of ensuring the safe storage of Liquid Natural Gas (LNG) in spherical tanks during seismic events, focusing on the crucial balance between meeting seis- mic performance criteria and mitigating economic losses due to potential operational disrup- tions from necessary retrofitting efforts. In response to this challenge, we present a case study on retrofitting an LNG tank near the North Anatolian Fault (NAF) line of Türkiye. Through a com- prehensive seismic evaluation, this study reveals inadequacies in the existing case's compliance with seismic criteria. It suggests a remedy involving the increased stiffness of lateral force-resist- …

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Evaluation Of The Effect Of Para-Aramid And Micro-Polyolefin Fibers On Permanent Displacement In Stone Mastic Asphalt, Sepehr Saedı Apr 2025

Evaluation Of The Effect Of Para-Aramid And Micro-Polyolefin Fibers On Permanent Displacement In Stone Mastic Asphalt, Sepehr Saedı

Journal of Sustainable Construction Materials and Technologies

This study examines the role of fibers formed from para-aramid and micropolyethylene in enhancing the performance of stone mastic asphalt (SMA) mixtures against permanent defor- mation. The use of SMA mixtures has the potential to mitigate permanent deformation and plasticity. Marshall tests, static creep tests, fatigue tests, and wheel track tests were conduct- ed on samples prepared using the modified Marshall design method to achieve the research objectives. According to the test results, Samples containing 1.5% of the fiber mixture's total weight exhibited greater strength than other samples. Additionally, these samples demonstrat- ed the most minor displacement against rutting among …

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Synergistic Effects Of Ggbfs Addition And Oven Drying On The Physical And Mechanical Properties Of Fly Ash-Based Geopolymer Aggregates, Chereddy Sonali Sri Durga, Venkatesh Chava, Mukkala Priyanka, Bypaneni Krishna Chaitanya, B. Naga Malleswara Rao, T. Muralidhara Rao Apr 2025

Synergistic Effects Of Ggbfs Addition And Oven Drying On The Physical And Mechanical Properties Of Fly Ash-Based Geopolymer Aggregates, Chereddy Sonali Sri Durga, Venkatesh Chava, Mukkala Priyanka, Bypaneni Krishna Chaitanya, B. Naga Malleswara Rao, T. Muralidhara Rao

Journal of Sustainable Construction Materials and Technologies

Conventional coarse aggregates, extracted from natural sources, pose environmental challenges such as habitat destruction, resource depletion, and high energy consumption. To mitigate these effects, this study prepared geopolymer aggregates (G.A.) using fly ash–GGBFS and an alkali ac- tivator solution through pelletization. Furthermore, two aggregate drying methods, oven drying, and ambient air drying, are adopted to evaluate their optimal performance through physical and mechanical tests. The results Indicated that oven-dried geopolymer aggregates exhibited optimal behavior in all experimental aspects compared to ambient air-dried aggregates. Specifically, the 80% fly ash–20% GGBFS mixed aggregates demonstrated lower crushing value (20.80%), impact value (24.7%), water …

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Flexural And Cracking Behavior Of Reinforced Lightweight Self-Compacting Concrete Beams Made With Leca Aggregate, Ramanjaneyulu Ningampalli, M. V. Seshagiri Rao, V. Bhaskar Desai Apr 2025

Flexural And Cracking Behavior Of Reinforced Lightweight Self-Compacting Concrete Beams Made With Leca Aggregate, Ramanjaneyulu Ningampalli, M. V. Seshagiri Rao, V. Bhaskar Desai

Journal of Sustainable Construction Materials and Technologies

In the current research, an attempt was made to examine the flexural and cracking behavior of reinforced lightweight self-compacting concrete (LWSCC) beams incorporating light-expand- ed clay aggregate (LECA) as a partial replacement for natural coarse aggregate (NCA). Me- chanical properties such as compressive strength, split tensile strength, and flexural strength were evaluated, alongside fresh properties assessed using flow table, V-funnel, J-ring, and L-box tests. The study examined six beams, including a control mix, with LECA replacements of 5%, 10%, 15%, 20%, and 25%. The results indicate that compressive strength decreased with higher LECA content, from 44.56 MPa in the control …

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Experimental Investigation Of The Effect Of Longitudinal Tensile Reinforcement Ratio On Ductility Behaviour In Gpc Beams, Ahmet Özbayrak, Ali İhsan Çelik, Mehmet Cemal Acar, Ahmet Şener Apr 2025

Experimental Investigation Of The Effect Of Longitudinal Tensile Reinforcement Ratio On Ductility Behaviour In Gpc Beams, Ahmet Özbayrak, Ali İhsan Çelik, Mehmet Cemal Acar, Ahmet Şener

Journal of Sustainable Construction Materials and Technologies

This research first determined the strength of the cylindrical geopolymer concrete materi- als under compressive stresses. Secondly, conventional and geopolymer-reinforced concrete beams were manufactured in different reinforcement ratios, and their mechanical properties were compared under bending. The main aim of this study is to experimentally compare the effect of reinforcement ratio on the ductility behavior of an alkali-activated geopolymer con- crete (GPC) beam with that of an ordinary Portland cement (OPC) beam. First, balanced reinforcement calculations were made considering the mechanical properties obtained from the material tests. The load-displacement, moment-curvature, and crack development results obtained from beam tests are interpreted …

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Mechanical Properties Of Kevlar And Jute Fiber Reinforced Concrete, Shamsoon Fareed, Bilal Zahid, Asad-Ur-Rehman Khan Apr 2025

Mechanical Properties Of Kevlar And Jute Fiber Reinforced Concrete, Shamsoon Fareed, Bilal Zahid, Asad-Ur-Rehman Khan

Journal of Sustainable Construction Materials and Technologies

Concrete, due to its inherent brittleness, exhibits relatively low tensile strength. Fibers have been used extensively to improve their mechanical properties as they helped to reduce the crack width. Textile industries produce a lot of natural and synthetic fiber waste, which can be utilized to produce better-performing fiber-reinforced concrete. Therefore, in this study, a detailed experimental investigation has been carried out to study the compressive, tensile, and flexural properties of the Kevlar and jute fiber reinforced concrete. Concrete specimens with a mix design ratio of 1:1.43:1.89 and a water-cement ratio of 0.6 were cast. Jute fibers with lengths of 10 …

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Determining The Importance Levels Of Criteria In Selection Of Sustainable Building Materials And Obstacles In Their Use, Serkan Yıldız, Gülnaz Şengül Güneş Apr 2025

Determining The Importance Levels Of Criteria In Selection Of Sustainable Building Materials And Obstacles In Their Use, Serkan Yıldız, Gülnaz Şengül Güneş

Journal of Sustainable Construction Materials and Technologies

The construction industry has become the focal point of sustainability as one of the largest con- sumers of natural resources and waste producers. A sustainable construction industry is possible with the sustainability of building materials, which is the main factor controlling the construc- tion management process. In this research, the importance levels of a total of 17 criteria under the headings of economic, environmental, and social sustainability in terms of sustainability of building materials and the importance levels of 11 obstacles to the use of sustainable materials were investigated through a survey conducted with the participation of 60 people. Whether …

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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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Evaluation Of Antimicrobial Properties In Coatings For Operating Room Surfaces, Halit Coza Apr 2025

Evaluation Of Antimicrobial Properties In Coatings For Operating Room Surfaces, Halit Coza

Journal of Sustainable Construction Materials and Technologies

This article highlights the crucial significance of upholding sterility in operating rooms (ORs) to minimize infection risks and uphold patient safety. Putting a spotlight on the pivotal role of antimicrobial coatings, the research delves into the examination of four frequently used coatings—polyurethane, acrylic, alkyd, and epoxy—across various surfaces within ORs. The study evaluates the antimicrobial properties of these coatings against 20 contaminant bacte- ria, uncovering diverse impacts on different strains. While these coatings may not inherently possess antimicrobial characteristics, formulations enriched with agents like 1,2-benzisothi- azol-3(2H)-one (BIT) and 2-octyl-2H-isothiazol-3-one (OIT) demonstrate active resistance against bacterial growth. The results highlight the …

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Analyzing An Efficient Mix Design For The Production Of Quality Asphalt Concrete: A Means Of Reducing Roads’ Maintenance Cost, Abiodun Kilani, Akinniyi Akinjide Adelani, Oladipupo Seun Oladejo, Bolanle Deborah Ikotun, Ademilade Olubambi Apr 2025

Analyzing An Efficient Mix Design For The Production Of Quality Asphalt Concrete: A Means Of Reducing Roads’ Maintenance Cost, Abiodun Kilani, Akinniyi Akinjide Adelani, Oladipupo Seun Oladejo, Bolanle Deborah Ikotun, Ademilade Olubambi

Journal of Sustainable Construction Materials and Technologies

Poor road design is the bedrock for strength deformation and formation of potholes in road pavement systems. The best choice of aggregates for asphalt concrete production contributes significantly to road pavement stability, sustainability, and durability at its serviceability life- style. The use of critical design and analysis techniques for the production of asphalt concrete is one of the standard means of eradicating the defect of roads’ pavement deformation in the global construction industries. This study reveals the hidden knowledge about the standard formulation and mix design required for producing durable asphaltic concrete pavements. In the experiment, three different mix designs …

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Investigation Of Usability Of Recycled Aggregate In Sifcon Production, Adil Gültekin Apr 2025

Investigation Of Usability Of Recycled Aggregate In Sifcon Production, Adil Gültekin

Journal of Sustainable Construction Materials and Technologies

Using recycled aggregates is crucial for a more sustainable environment and economy. In this study, the properties of recycled aggregate-based SIFCONs were examined. In the scope of the study, compressive strength, high-temperature resistance, sorptivity, and fracture energy of SIFCONs produced with recycled aggregate were investigated. The results were compared with those of the limestone-bearing SIFCONs. It was determined that the compressive strength and fracture energy of SIFCONs produced with recycled aggregate were 61.2 MPa and 14.9 N/mm, respectively. Although these values are lower than those of SIFCONs produced with limestone, it has been determined that recycled aggregates are advantageous in …

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Preparation Of Calcite-Precipitating Bacteria-Embedded Magnesium Phosphate Cement For Self-Healing Application, Deeksha Patil, Alankar Sapkal, Shreyas Pranav, Mukund Lahoti, Ashish Gadekar, Anupama Pable, Umesh Jadhav Apr 2025

Preparation Of Calcite-Precipitating Bacteria-Embedded Magnesium Phosphate Cement For Self-Healing Application, Deeksha Patil, Alankar Sapkal, Shreyas Pranav, Mukund Lahoti, Ashish Gadekar, Anupama Pable, Umesh Jadhav

Journal of Sustainable Construction Materials and Technologies

The present study was undertaken to check the feasibility of magnesium phosphate cement (MPC) for the immobilization of calcite-precipitating bacteria. An aqueous route of MPC synthesis was followed using magnesium phosphate Mg3(PO4)2 powder and ammonium phosphate solution. The Fourier-transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) analysis confirmed the synthesis of MPC. The thermal decomposition analysis (TGA) showed decomposition of struvite between 50–60 °C - Paenibacillus sp. NCIM 5410 was used due to its urea hydrolysis ability. pH 9 was found to be optimum for urea hydrolysis. The urea hydrolysis steadily decreased with an increase in temperature from 30 …

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Evaluating The Factors Influencing The Sustainable Refrigerant Selection By Fuzzy Decision Making Approach, Mehmet Seyhan, Ertuğrul Ayyıldız, Melike Erdogan Apr 2025

Evaluating The Factors Influencing The Sustainable Refrigerant Selection By Fuzzy Decision Making Approach, Mehmet Seyhan, Ertuğrul Ayyıldız, Melike Erdogan

Journal of Sustainable Construction Materials and Technologies

Considering that cooling in cooling systems is more costly than heating, the importance of refrigerant selection in cooling systems is even more obvious. Due to the complexity of the refrigerant selection problem, a multi-criteria decision approach must be used to implement a thorough and organized evaluation of the factors. The purpose of this study is to evaluate the criteria to be considered when choosing refrigerants using the interval type-2 trapezoidal fuzzy Analytic Hierarchy Process (AHP). As a result, the most important and least crucial refrigerant selection criteria are determined by calculating the weights and obtaining the ranking of the requirements. …

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Effect Of Mineral Admixtures And Curing Regimes On Properties Of Self-Compacting Concrete, Venkatesh Chava, Seshagiri Rao M.V., Praveen Kumar Munugala, Sonali Sri Durga Chereddy Apr 2025

Effect Of Mineral Admixtures And Curing Regimes On Properties Of Self-Compacting Concrete, Venkatesh Chava, Seshagiri Rao M.V., Praveen Kumar Munugala, Sonali Sri Durga Chereddy

Journal of Sustainable Construction Materials and Technologies

This study investigated the influence of mineral admixtures (fly ash, silica fume, metakaolin) and curing conditions (water immersion, polyethylene glycol, gunny bags, accelerated curing) on the properties of self-compacting concrete (SCC). The rheological properties, compressive strength, chloride penetration resistance, and microstructure were evaluated. Incorporating mineral admixtures improved the workability, strength (up to 53% increase), and durability of SCC compared to plain mixes, with 20% metakaolin replacement optimal. Water immersion curing enhanced the compressive strength (3–15% increase) and chloride resistance (up to 30% decrease in migration coefficient) owing to improved hydration and microstructural refinement. Mineral admixtures reduced the sensitivity of SCC …

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