489 results match your criteria Applied Composite Materials[Journal]

Investigation into the Effect of Spinel Pigments on the Photostability and Combustion Properties of Ethylene-Norbornene Copolymer.

Materials (Basel) 2021 Jul 20;14(14). Epub 2021 Jul 20.

Institute of Polymer and Dye Technology, Faculty of Chemistry, Lodz University of Technology, Stefanowskiego 12/16, 90-924 Lodz, Poland.

Multicolor ethylene-norbornene (EN) composites filled with three different spinel pigments (Cobalt Green-PG50, Zinc Iron Yellow-PY 119, Praseodym Yellow-PY159) were prepared by melt mixing and characterized in terms of their stability under destructive environmental conditions. The EN films were subjected to accelerated aging by ultraviolet (UV) photooxidation for 300 h, 600 h, or 900 h. The mechanical performance of the EN composites was investigated in static and dynamic mechanical tests. Read More

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Deflection Estimation Based on the Thermal Characteristics of Composite Deck Slabs Containing Macro-Synthetic Fibers.

Materials (Basel) 2021 Jul 20;14(14). Epub 2021 Jul 20.

Department of Architectural Engineering, Hanyang University, Seoul 04763, Korea.

The purpose of this study was to evaluate the structural performance of composite deck slabs containing macro-synthetic fibers. after a fire by proposing a deflection estimation method for non-fireproof structural decks. Therefore, this study evaluated the fire resistance performance and deflection of deck slabs mixed with macro-synthetic fibers. Read More

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Mechanical Properties of Cemented Particulate Composite: A 3D Micromechanical Model.

Materials (Basel) 2021 Jul 12;14(14). Epub 2021 Jul 12.

Kcy Laboratory of Mechanical Reliability for Heavy Equipment and Lark Structures of Hebei Province, Yanshan University, Qinhuangdao 066004, China.

Cemented particulate composite is a kind of composite material with high strength, high energy absorption, and multifunctional characteristics, which is widely used in engineering practice. The calculation of the mechanical properties of granular composites based on theoretical methods has always been a topic of discussion. A micromechanical model with a three-dimensional rigid beam-spring network (3D-RBSN) is proposed here. Read More

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New Nitride Nanoceramics from Synthesis-Mixed Nanopowders in the Composite System Gallium Nitride GaN-Titanium Nitride TiN.

Materials (Basel) 2021 Jul 7;14(14). Epub 2021 Jul 7.

Institute of High Pressure Physics, Polish Academy of Sciences, ul. Sokołowska 29/37, 01-142 Warszawa, Poland.

Presented is a study on the preparation, via original precursor solution chemistry, of intimately mixed composite nanocrystalline powders in the system gallium nitride GaN-titanium nitride TiN, atomic ratio Ga/Ti = 1/1, which were subjected to high-pressure (7.7 GPa) and high-temperature (650, 1000, and 1200 °C) sintering with no additives. Potential equilibration toward bimetallic compounds upon mixing of the solutions of the metal dimethylamide precursors, dimeric {Ga[N(CH)]} and monomeric Ti[N(CH)], was studied with H- and C{H}-NMR spectroscopy in CD solution. Read More

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Structure, Luminescence, and Magnetic Properties of Crystalline Manganese Tungstate Doped with Rare Earth Ion.

Materials (Basel) 2021 Jul 2;14(13). Epub 2021 Jul 2.

Division of Materials Science and Engineering, Silla University, Busan 46958, Korea.

The precursor prepared by co-precipitation method was sintered at various temperatures to synthesize crystalline manganese tungstate (MnWO). Sintered MnWO showed the best crystallinity at a sintering temperature of 800 °C. Rare earth ion (Dysprosium; Dy) was added when preparing the precursor to enhance the magnetic and luminescent properties of crystalline MnWO based on these sintering temperature conditions. Read More

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Consideration of Lamination Structural Analysis in a Multi-Layered Composite and Failure Analysis on Wing Design Application.

Materials (Basel) 2021 Jul 2;14(13). Epub 2021 Jul 2.

Department of Aerospace Engineering, Faculty of Engineering, Universiti Putra Malaysia (UPM), Serdang 43400, Selangor, Malaysia.

A finite element (FE) model is developed to study the structural performance on a composite wing of a UAV with a tubercle design at the leading edge of the wing. The experimental study of the designation of the composite at the wing skin is carried out to prove the simulation validity through material characteristics. In this paper, the numerical modeling for simulation is highlighted to correlate the process parameter setting of simulation replicating the actual experimental tests. Read More

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Cranberry Juice Extract Rapidly Protects Demineralized Dentin against Digestion and Inhibits Its Gelatinolytic Activity.

Materials (Basel) 2021 Jun 29;14(13). Epub 2021 Jun 29.

Department of Oral & Craniofacial Sciences and Center of Excellence in Mineralized Tissues, School of Dentistry, University of Missouri-Kansas City, 650 E 25th St., Kansas City, MO 64108, USA.

Improving the longevity of composite restorations has proven to be difficult when they are bonded to dentin. Dentin demineralization leaves collagen fibrils susceptible to enzymatic digestion, which causes breakdown of the resin-dentin interface. Therefore, measures for counteracting the enzymatic environment by enhancing dentin collagen's resistance to degradation have the potential to improve the durability of dental composite restorations. Read More

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Comprehensive Research and Analysis of a Coated Machining Tool with a New TiAlN Composite Microlayer Using Magnetron Sputtering.

Materials (Basel) 2021 Jun 29;14(13). Epub 2021 Jun 29.

Deparment of Solid State Engineering, University of Chemistry and Technology Prague, Technická 5, 166 28 Praha 6, Czech Republic.

The application of thin monolayers helps to increase the endurance of a cutting tool during the drilling process. One such trendy coating is TiAlN, which guarantees high wear resistance and helps to "smooth out" surface defects. For this reason, a new type of weak TiAlN microlayer with a new composition has been developed and applied using the HIPIMs magnetron sputtering method. Read More

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A Two-Dimensional Model for Pin-Load Distribution and Failure Analysis of Composite Bolted Joints.

Materials (Basel) 2021 Jun 30;14(13). Epub 2021 Jun 30.

Shanghai Aircraft Design and Research Institute, Jinke Road 5188#, Shanghai 201210, China.

Multibolt composite joints are widely used in aircraft structures. The determination of the pin-load distribution among the bolts is a critical step in the failure prediction of bolted joints. In this paper, a two-dimensional model of the multibolt composite structure is established for the pin-load distribution analysis. Read More

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Carbon-Silica Composite as Adsorbent for Removal of Hazardous C.I. Basic Yellow 2 and C.I. Basic Blue 3 Dyes.

Materials (Basel) 2021 Jun 11;14(12). Epub 2021 Jun 11.

Chuiko Institute of Surface Chemistry, National Academy of Sciences of Ukraine, General Naumov Street 17, 03164 Kyiv, Ukraine.

Treatment of wastewaters containing hazardous substances such as dyes from the textile, paper, plastic and food industries is of great importance. Efficient technique for the removal of highly toxic organic dyes is adsorption. In this paper, adsorptive properties of the carbon-silica composite (C/SiO) were evaluated for the cationic dyes C. Read More

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Mechanical Properties of Bio-Composites Based on Epoxy Resin and Nanocellulose Fibres.

Materials (Basel) 2021 Jun 26;14(13). Epub 2021 Jun 26.

Faculty of Aviation, Military University of Aviation, Dywizjonu 303/35 Str., 08-521 Dęblin, Poland.

The aim of our research was to investigate the effect of a small nanocellulose (NC) addition on an improvement of the mechanical properties of epoxy composites. A procedure of chemical extraction from pressed lignin was used to obtain nanocellulose fibers. The presence of nanoparticles in the cellulose pulp was confirmed by FTIR/ATR spectra as well as measurement of nanocellulose particle size using a Zetasizer analyzer. Read More

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X-ray Computed Tomography Procedures to Quantitatively Characterize the Morphological Features of Triply Periodic Minimal Surface Structures.

Materials (Basel) 2021 Jun 1;14(11). Epub 2021 Jun 1.

Bundesanstalt für Materialforschung und -prüfung (BAM), Unter den Eichen 87, 12205 Berlin, Germany.

Additively manufactured (AM) metallic sheet-based Triply Periodic Minimal Surface Structures (TPMSS) meet several requirements in both bio-medical and engineering fields: Tunable mechanical properties, low sensitivity to manufacturing defects, mechanical stability, and high energy absorption. However, they also present some challenges related to quality control, which can prevent their successful application. In fact, the optimization of the AM process is impossible without considering structural characteristics as manufacturing accuracy, internal defects, as well as surface topography and roughness. Read More

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Characterization of AlO Samples and NiAl-AlO Composite Consolidated by Pulse Plasma Sintering.

Materials (Basel) 2021 Jun 19;14(12). Epub 2021 Jun 19.

Faculty of Materials Science and Engineering, Warsaw University of Technology, 141 Woloska St., 02-507 Warsaw, Poland.

The paper describes an investigation of AlO samples and NiAl-AlO composites consolidated by pulse plasma sintering (PPS). In the experiment, several methods were used to determine the properties and microstructure of the raw AlO powder, NiAl-AlO powder after mechanical alloying, and samples obtained via the PPS. The microstructural investigation of the alumina and composite properties involves scanning electron microscopy (SEM) analysis and X-ray diffraction (XRD). Read More

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Factors of Stress Concentration around Spherical Cavity Embedded in Cylinder Subjected to Internal Pressure.

Materials (Basel) 2021 Jun 3;14(11). Epub 2021 Jun 3.

Mechanical Engineering Faculty, University of Sciences and Technology, Mohamed Boudiaf (USTOMB), BP 1505, El M'naouer, Oran 31000, Algeria.

In this paper, an accurate distribution of stress as well as corresponding factors of stress concentration determination around a spherical cavity, which is considered as embedded in a cylinder exposed to the internal pressure only, is presented. This approach was applied at three main meridians of the porosity by combining the Eshelby's equivalent inclusion method with Mura and Chang's methodology employing the jump condition across the interface of the cavity and matrix, respectively. The distribution of stresses around the spherical flaw and their concentration factors were formulated in the form of newly formulated analytical relations involving the geometric ratio of the cylinder, such as external radius and thickness, the angle around the cavity, depth of the porosity, as well as the material Poisson ratio. Read More

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Development of a System for Additive Manufacturing of Ceramic Matrix Composite Structures Using Laser Technology.

Materials (Basel) 2021 Jun 12;14(12). Epub 2021 Jun 12.

Fraunhofer Institute for Material and Beam Technology (IWS), 01277 Dresden, Germany.

Ceramic matrix composites (CMCs) are refractory ceramic materials with damage-tolerant behavior. Coming from the space industry, this class of materials is increasingly being used in other applications, such as automotive construction for high-performance brake discs, furnace technology, heat coatings for pipe systems and landing flaps on reusable rocket sections. In order to produce CMC faster and more cost-efficiently for the increasing demand, a new additive manufacturing process is being tested, which in the future should also be able to realize material joints and higher component wall thicknesses than conventional processes. Read More

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A 3D Finite Element Analysis Model of Single Implant-Supported Prosthesis under Dynamic Impact Loading for Evaluation of Stress in the Crown, Abutment and Cortical Bone Using Different Rehabilitation Materials.

Materials (Basel) 2021 Jun 24;14(13). Epub 2021 Jun 24.

Faculty of Dentistry, Universitat Internacional de Catalunya (UIC), 08017 Barcelona, Spain.

In the literature, many researchers investigated static loading effects on an implant. However, dynamic loading under impact loading has not been investigated formally using numerical methods. This study aims to evaluate, with 3D finite element analysis (3D FEA), the stress transferred (maximum peak and variation in time) from a dynamic impact force applied to a single implant-supported prosthesis made from different materials. Read More

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Investigation of Hydrothermally Stressed Silicone Rubber/Silica Micro and Nanocomposite for the Coating High Voltage Insulation Applications.

Materials (Basel) 2021 Jun 25;14(13). Epub 2021 Jun 25.

Department of Electronics Engineering, University of Engineering and Technology (UET) Peshawar (Abbottabad Campus), Abbottabad 22010, Pakistan.

Silicone rubber is a promising insulating material that has been performing well for different insulating and dielectric applications. However, in outdoor applications, environmental stresses cause structural and surface degradations that diminish its insulating properties. This effect of degradation can be reduced with the addition of a suitable filler to the polymer chains. Read More

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Recovery of Industrial Wastes as Fillers in the Epoxy Thermosets for Building Application.

Materials (Basel) 2021 Jun 23;14(13). Epub 2021 Jun 23.

Department of Technology of Building Materials and Components, Faculty of Civil Engineering, Brno University of Technology, Veveří 331/95, 602 00 Brno, Czech Republic.

Epoxy resins are currently used in many areas of construction, such as resistant coatings, anchors, fibre-reinforced polymer (FRP) composites, grouts, etc. This paper deals mainly with epoxy composites that can be applied during the rehabilitation of concrete constructions. The influence of a filler type on epoxy thermoset composites was monitored, whilst three different types of epoxy resin were used in order to achieve a better representation and confirmation of the results. Read More

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Effect of SWCNT-Tuball Paper on the Lightning Strike Protection of CFRPs and Their Selected Mechanical Properties.

Materials (Basel) 2021 Jun 7;14(11). Epub 2021 Jun 7.

Polskie Zakłady Lotnicze Sp. z o.o.-PZL Mielec A Lockheed Martin Company, ul. Wojska Polskiego 3, 39-300 Mielec, Poland.

The main aim of this work was the investigation of the possibility of replacing the heavy metallic meshes applied onto the composite structure in airplanes for lightning strike protection with a thin film of Tuball single-wall carbon nanotubes in the form of ultra-light, conductive paper. The Tuball paper studied contained 75 wt.% or 90 wt. Read More

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Comparison of Physicochemical Properties of Fly Ash Precursor, Na-P1(C) Zeolite-Carbon Composite and Na-P1 Zeolite-Adsorption Affinity to Divalent Pb and Zn Cations.

Materials (Basel) 2021 Jun 2;14(11). Epub 2021 Jun 2.

Department of Radiochemistry and Environmental Chemistry, Faculty of Chemistry, Maria Curie-Sklodowska University in Lublin, M. Curie-Sklodowska Sq. 3, 20-031 Lublin, Poland.

Considering the growing needs of environmental remediation, new effective solutions should be sought. Therefore, the adsorbed amounts of heavy metal ions, such as lead(II) and zinc(II), on the surface of high-carbon fly ash (HiC FA), zeolite--carbon composite (Na-P1(C)) and pure zeolite (Na-P1), were investigated. The applied solids were characterized using the following techniques: XRD, SEM-EDS, TEM, porosimetry, SLS, electrophoresis and potentiometric titration. Read More

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Non-Destructive Diagnostics of Concrete Beams Strengthened with Steel Plates Using Modal Analysis and Wavelet Transform.

Materials (Basel) 2021 Jun 2;14(11). Epub 2021 Jun 2.

Department of Mechanics of Materials and Structures, Faculty of Civil and Environmental Engineering, Gdańsk University of Technology, Narutowicza 11/12, 80-233 Gdańsk, Poland.

Externally bonded reinforcements are commonly and widely used in civil engineering objects made of concrete to increase the structure load capacity or to minimize the negative effects of long-term operation and possible defects. The quality of adhesive bonding between a strengthened structure and steel or composite elements is essential for effective reinforcement; therefore, there is a need for non-destructive diagnostics of adhesive joints. The aim of this paper is the detection of debonding defects in adhesive joints between concrete beams and steel plates using the modal analysis approach. Read More

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Investigation on Microstructure, Mechanical and Wear Properties of HVOF Sprayed Composite Coatings (WC-Co + CR) On Ductile Cast Iron.

Materials (Basel) 2021 Jun 14;14(12). Epub 2021 Jun 14.

Łukasiewicz Research Network-Cracow Technology Institute, 73 Zakopianska St., 30-418 Cracow, Poland.

Recent work indicates that the high-velocity oxy-fuel (HVOF) thermal spraying WC-Co coatings have been used to enhance the wear resistance of various engineering components in a variety of industrial environments. In the present work, WC-Co powder, containing Cr particles in an amount of 10%, was deposited on ductile cast iron with the HVOF thermal spray coating technique. An investigation was conducted to determine the role of Cr particles in the WC-Co coating produced with the HVOF technique on microstructure, mechanical, and wear properties in a system of type: WC-Co coating/ductile cast iron. Read More

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Preparation and Properties of Layered SiC-Graphene Composites for EDM.

Materials (Basel) 2021 May 28;14(11). Epub 2021 May 28.

Institute of Inorganic Chemistry, Slovak Academy of Sciences, Dúbravská Cesta 9, 845 36 Bratislava, Slovakia.

Three and five-layered silicon carbide-based composites containing 0, 5, and 15 wt.% of graphene nanoplatelets (GNPs) were prepared with the aim to obtain a sufficiently high electrical conductivity in the surface layer suitable for electric discharge machining (EDM). The layer sequence in the asymmetric three-layered composites was SiC/SiC-5GNPs/SiC-15GNPs, while in the symmetric five-layered composite, the order of layers was SiC-15GNPs/SiC-5GNPs/SiC/SiC-5GNPs/SiC-15GNPs. Read More

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Viscosity Model for Nanoparticulate Suspensions Based on Surface Interactions.

Materials (Basel) 2021 May 23;14(11). Epub 2021 May 23.

Institute for Particle Technology, Technische Universität Braunschweig, 38106 Braunschweig, Germany.

In this paper, a widely mechanistic model was developed to depict the rheological behaviour of nanoparticulate suspensions with solids contents up to 20 wt.%, based on the increase in shear stress caused by surface interaction forces among particles. The rheological behaviour is connected to drag forces arising from an altered particle movement with respect to the surrounding fluid. Read More

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Microstructure and Abrasive Wear Resistance of Metal Matrix Composite Coatings Deposited on Steel Grade AISI 4715 by Powder Plasma Transferred Arc Welding Part 2. Mechanical and Structural Properties of a Nickel-Based Alloy Surface Layer Reinforced with Particles of Tungsten Carbide and Synthetic Metal-Diamond Composite.

Materials (Basel) 2021 May 25;14(11). Epub 2021 May 25.

Welding Department, Faculty of Mechanical Engineering, Silesian University of Technology, Konarskiego 18A, 44-100 Gliwice, Poland.

The article is the continuation of a cycle of works published in a Special Issue of MDPI entitled "Innovative Technologies and Materials for the Production of Mechanical, Thermal and Corrosion Wear-Resistant Surface Layers and Coatings" related to tests concerning the microstructure and mechanical properties of innovative surface layers made using the Powder Plasma Transferred Arc Welding (PPTAW) method and intended for work surfaces of drilling tools and machinery applied in the extraction industry. A layer subjected to tests was a metal matrix composite, made using powder based on a nickel alloy containing spherical fused tungsten carbide (SFTC) particles, which are fused tungsten carbide (FTC) particles and spherical particles of tungsten-coated synthetic metal-diamond composite (PD-W). The layer was deposited on the substrate of low-alloy structural steel grade AISI 4715. Read More

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Identification of Mode Shapes of a Composite Cylinder Using Convolutional Neural Networks.

Materials (Basel) 2021 May 25;14(11). Epub 2021 May 25.

Faculty of Civil and Environmental Engineering and Architecture, Rzeszów University of Technology, al. Powstańców Warszawy 12, 35-959 Rzeszów, Poland.

The aim of the following paper is to discuss a newly developed approach for the identification of vibration mode shapes of multilayer composite structures. To overcome the limitations of the approaches based on image analysis (two-dimensional structures, high spatial resolution of mode shapes description), convolutional neural networks (CNNs) are applied to create a three-dimensional mode shapes identification algorithm with a significantly reduced number of mode shape vector coordinates. The CNN-based procedure is accurate, effective, and robust to noisy input data. Read More

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Effects of Amorphous Poly Alpha Olefin (APAO) and Polyphosphoric Acid (PPA) on the Rheological Properties, Compatibility and Stability of Asphalt Binder.

Materials (Basel) 2021 May 10;14(9). Epub 2021 May 10.

State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao 266580, China.

High production costs and poor storage stability have become important constraints in the manufacture of modified asphalt binder. To simplify the production process and reduce the production cost, amorphous poly alpha olefin (APAO) and polyphosphoric acid (PPA) were applied to prepare highly stable modified asphalt binder. The influence of APAO/PPA on the temperature sensitivity, rheological property, storage stability, compatibility and microstructure of neat binder were studied by rotational viscosity (RV), dynamic shear rheometer (DSR), bending beam rheometer (BBR) and Fourier transform infrared (FTIR) spectroscopy. Read More

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Synthesis and Characterization of Electrospun Composite Scaffolds Based on Chitosan-Carboxylated Graphene Oxide with Potential Biomedical Applications.

Materials (Basel) 2021 May 13;14(10). Epub 2021 May 13.

Advanced Polymer Materials Group, University Politehnica of Bucharest, 1-7 Polizu, 011061 Bucharest, Romania.

This research study reports the development of chitosan/carboxylated graphene oxide (CS/GO-COOH) composite scaffolds with nanofibrous architecture using the electrospinning method. The concept of designed composite fibrous material is based on bringing together the biological properties of CS, mechanical, electrical, and biological characteristics of GO-COOH with the versatility and efficiency of ultra-modern electrospinning techniques. Three different concentrations of GO-COOH were added into a chitosan (CS)-poly(ethylene oxide) (PEO) solution (the ratio between CS/PEO was 3/7 (/)) and were used in the synthesis process of composite scaffolds. Read More

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Influence of Tool Holder Types on Vibration in Rough Milling of AZ91D Magnesium Alloy.

Materials (Basel) 2021 May 12;14(10). Epub 2021 May 12.

Department of Applied Mechanics, Mechanical Engineering Faculty, Lublin University of Technology, 20-618 Lublin, Poland.

The article presents the results of an analysis of the influence of the technological parameters related to tool holder types on the vibrations occurring during the milling of AZ91D magnesium alloy. Magnesium alloys are very low-density materials and, therefore, are increasingly being considered as replacement materials for the more commonly used aluminium alloys. The tool used in the study was a carbide end mill with TiAlN coating, clamped in three different types of tool holder: ER collet, heat shrink, and Tendo E hydraulic. Read More

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Characteristics of Waste Iron Powder as a Fine Filler in a High-Calcium Fly Ash Geopolymer.

Materials (Basel) 2021 May 12;14(10). Epub 2021 May 12.

Center of Excellence in Natural Disaster Management, Department of Civil Engineering, Faculty of Engineering, Chiang Mai University, Chiang Mai 50200, Thailand.

Geopolymer (GP) has been applied as an environmentally-friendly construction material in recent years. Many pozzolanic wastes, such as fly ash (FA) and bottom ash, are commonly used as source materials for synthesizing geopolymer. Nonetheless, many non-pozzolanic wastes are often applied in the field of civil engineering, including waste iron powder (WIP). Read More

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