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Phase Change Material In Glazing Windows System: A Review, Mina Nsaif, Mounir Baccar, Jalal Jalil Mar 2026

Phase Change Material In Glazing Windows System: A Review, Mina Nsaif, Mounir Baccar, Jalal Jalil

Engineering and Technology Journal

As far as thermal insulation is concerned, phase change materials (PCM) have a very good potential to be excellent insulation materials due to their thermal properties like low thermal conductivity and high latent heat. The researchers started to incorporate the walls and windows with PCM to reduce the internal surface temperature and indoor temperature of the room. This paper focuses on double and triple-glazed windows’ thermal performance, different filling insulation materials, ventilation windows, and thermochromic glazing. In addition, a detailed discussion on the effect of changing the thickness and the thermal characteristics of the PCM and its influence on the …

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Studying The Influence Of Variable Inlet Guide Vane With The Physical Faults On The Performance Of Industrial Gas Turbine At Part-Load Operation, Waleligne Salilew, Zainal Abdul Karim, Tamiru Lemma Mar 2026

Studying The Influence Of Variable Inlet Guide Vane With The Physical Faults On The Performance Of Industrial Gas Turbine At Part-Load Operation, Waleligne Salilew, Zainal Abdul Karim, Tamiru Lemma

Engineering and Technology Journal

This research work presents a gas turbine performance investigation. Researchers have put efforts into this field of study; however, the influence of the concurrence of variable inlet guide vane (VIGV) drift, fouling, and erosion on the three-shaft gas turbine’s performance during part-load operation has remained unexplored. Therefore, this study addresses this gap. First the gas turbine design point and off-design performance model have been developed by utilizing the original engine manufacturer data provided. The accuracy of the models was validated, and the maximum mean absolute percentage error of the design point performance model is shown at exhaust temperature prediction, it …

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Investigating The Impact Of Process Parameters On Thinning And Formability In Aluminum Alloy Aa 1050 Incremental Sheet Metal Forming, Safaa Ghazi, Aqeel Bedan, Maher Salloom Mar 2026

Investigating The Impact Of Process Parameters On Thinning And Formability In Aluminum Alloy Aa 1050 Incremental Sheet Metal Forming, Safaa Ghazi, Aqeel Bedan, Maher Salloom

Engineering and Technology Journal

ISMF is a potential manufacturing technology that uses progressive deformation to create complicated shapes. ISMF produces sheet metal consecutively using targeted tool movement. This innovative method increases component precision, material waste reduction, and design flexibility. A tool is moved along a set path over a flat metal sheet while twisting forces are applied to get the needed shape. SPIF could be used in the medical equipment, aerospace, automotive, and building industries, but it is only profitable in certain situations because it is slower than other sheet-forming methods. SPIF-based die-less making makes it easier to shape. To make cone-shaped structures with …

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Investigation Of The Effect Of Spif Parameters On The Thickness Of Al 2024 Alloy, Halah Habeeb, Muhsin Jweeg, Ali Khleif Mar 2026

Investigation Of The Effect Of Spif Parameters On The Thickness Of Al 2024 Alloy, Halah Habeeb, Muhsin Jweeg, Ali Khleif

Engineering and Technology Journal

Sheet metal forming is one of the most commonly used manufacturing processes because millions of different parts are formed daily. In the single-point incremental forming process (SPIF), the change in the thickness of the sheet material is an essential parameter because it is an indicator of the occurrence of failure. In this context, this study investigates the effect of SPIF parameters on the thickness of the Al 2024 alloy used in producing the truncated pyramid. The process parameters were the sheet thicknesses of (1, 1.5, and 2) mm, the step depths of (0.2, 0.4, and 0.6) mm, and the wall …

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Investigation Of The Level Of Adoption Of The Lean Philosophy In Small And Medium Enterprises Using Integrated Fuzzy Assessment Model Based On Fuzzy Dematel / Fuzzy Topsis, Zainab Al-Baldawi, Allaeldin Kassam, Sawsan Al-Zubaidi Mar 2026

Investigation Of The Level Of Adoption Of The Lean Philosophy In Small And Medium Enterprises Using Integrated Fuzzy Assessment Model Based On Fuzzy Dematel / Fuzzy Topsis, Zainab Al-Baldawi, Allaeldin Kassam, Sawsan Al-Zubaidi

Engineering and Technology Journal

Lean Production is a continuous improvement philosophy derived from the Toyota Production System (TPS) aimed at improving the operational efficiency and performance of companies. Although the Lean philosophy has been widely applied in large enterprises, its implementation and adoption in small and medium-sized enterprises (SMEs) has remained relatively underexplored. In this paper, a fuzzy assessment model has been proposed that integrates Fuzzy Decision-Making Trial and Evaluation Laboratory (Fuzzy DEMATEL) and Fuzzy Technique for Order of Preference by Similarity to Ideal Solution (Fuzzy TOPSIS) to aim to investigate the level of implementation and adoption of the lean philosophy in SMEs through …

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Analyzing The Impact Of Fdm Parameters On Compression Strength And Dimensional Accuracy In 3d Printed Pla Parts, Hind Abdulridha, Tahseen Abbas Mar 2026

Analyzing The Impact Of Fdm Parameters On Compression Strength And Dimensional Accuracy In 3d Printed Pla Parts, Hind Abdulridha, Tahseen Abbas

Engineering and Technology Journal

Fused deposition modeling (FDM) is an additive manufacturing (AM) technique frequently used to create prototypes and parts with intricate geometrical designs. It is gaining popularity since it enhances products by removing the need for expensive equipment. The materials used, the printing process, and the parameters influence the mechanical properties of printed objects. The quality and functionality of the parts are impacted by FDM process parameters. This study focused on the impact of six parameters on the mechanical and physical properties of samples printed using the FDM machine (Creality Ender-5 Pro). The infill density percentage, infill pattern, layer thickness, shell thickness, …

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Integrating Grey Relation Analysis And Artificial Neural Networks For Optimal Machining Of Tungsten Carbide Composite Using Hybrid Electrochemical Discharge, Vian Najm, Tahseen Abbas, Shukry Aghdeab Mar 2026

Integrating Grey Relation Analysis And Artificial Neural Networks For Optimal Machining Of Tungsten Carbide Composite Using Hybrid Electrochemical Discharge, Vian Najm, Tahseen Abbas, Shukry Aghdeab

Engineering and Technology Journal

Hybrid Electrochemical Discharge Machining (ECDM) streamlines the manufacturing process for challenging materials. Tungsten carbide (WC) is widely recognized as a formidable material due to its exceptional hardness and its ability to maintain hardness even at elevated temperatures. This study has conducted a comprehensive investigation of the multi-response optimization of ECDM process parameters to enhance the machining of tungsten carbides, utilizing Grey Relation Analysis (GRA) and Artificial Neural Network (ANN) methods. This optimization's primary objective is to achieve the maximum Material Removal Rate (MRR) and machining depth. The study involved a systematically designed experiment based on the Taguchi design method. Scanning …

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Using Taguchi Design To Compare The Corrosion Behavior Of Commercial Pure Ti Alloys Coated By Dip And Electrophoretic Deposition With Ysz, Marwan Hussein, Ali Mustafa, Makarim Abdulkareem Mar 2026

Using Taguchi Design To Compare The Corrosion Behavior Of Commercial Pure Ti Alloys Coated By Dip And Electrophoretic Deposition With Ysz, Marwan Hussein, Ali Mustafa, Makarim Abdulkareem

Engineering and Technology Journal

This study makes experimental evaluations of the corrosion and tip tests of  CP-Ti joint (commercial pure Ti) implant alloys coated with YSZ nanoceramic. A Taguchi design of experiments (DOE) strategy was used to create a thin adhesive covering utilizing dip coating and electrophoretic deposition techniques. An L9-type orthogonal Taguchi array determined how dip coating and electrophoretic deposition factors, such as temperature, voltage, YSZ concentration, time, and the degree of pulverizing the Ti alloy substrate, affected the deposition yield. The Ti alloys were coated using the optimal settings for the dip coating and electrophoretic deposition procedures as previously described, utilizing the …

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Evaluation Of The Performance Of Steel Slag And Waste Glass As A Cement Replacement, Ahmed Azeez, Maan Hassan, Alaa Atiyah Mar 2026

Evaluation Of The Performance Of Steel Slag And Waste Glass As A Cement Replacement, Ahmed Azeez, Maan Hassan, Alaa Atiyah

Engineering and Technology Journal

The industrial development and growth in population activity caused an annual increase in solid wastes over the past decades. The emissions of CO2 from the cement industry are the main source of air pollution. Recycling wastes as cementitious materials conserve the ecosystem in different aspects, e.g., reduction of CO2 footprint. Consequently, the pozzolanic activity of two solid wastes abundantly available in Iraq, steel slag (SS) and waste glass (WG), were evaluated. This study aimed to replace them with ordinary Portland cement. This will achieve a sustainable, eco-efficient, and environmentally friendly construction industry. The Chemical analysis of the wastes by XRF …

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Comparison Between The Effect Of Adding Msgnp And B4c-Wc Nanoparticles On The Metallurgical And Mechanical Characterization Of Al-7075 Composites Produced By Stir Casting, Haneen Lateef, Saad Ali Mar 2026

Comparison Between The Effect Of Adding Msgnp And B4c-Wc Nanoparticles On The Metallurgical And Mechanical Characterization Of Al-7075 Composites Produced By Stir Casting, Haneen Lateef, Saad Ali

Engineering and Technology Journal

Metal Matrix Composite (MCC) reveals considerably better properties, such as low density, high tensile strength, hardness, and good resistance to wear compared with every alloy or other metal. The current study concentrated upon the assessment of the properties of aluminum matrix composites (AMCs) synthesis with the Al-7075 as a matrix and the MSGNPs that sieved to (35 nm) at different weight fractions percentages as reinforcements using stir-casting method and compared with Al7075/B4C-WC nanocomposites. These experiments aim to select the appropriate type and percentage of reinforcement particles for producing Al-7075 composites with the best mechanical properties. The mechanical properties, as well …

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Mechanical Strength Optimization For The Polylactic Acid Printed Parts In Material Extrusion Process Using Artificial Neural Network, Mustafa Abdulrazaq, Mohanned Al-Khafaji, Abdulkader Kadauw Mar 2026

Mechanical Strength Optimization For The Polylactic Acid Printed Parts In Material Extrusion Process Using Artificial Neural Network, Mustafa Abdulrazaq, Mohanned Al-Khafaji, Abdulkader Kadauw

Engineering and Technology Journal

Material Extrusion technology is one of the most widely used Additive Manufacturing processes due to its simplicity in use, affordable parts fabricating costs, product durability, and possibility for changing materials. Despite having many advantages, parts manufactured through this technique fall short in strength criteria. The present paper focuses on predicting and optimizing three critical printing parameters in additive manufacturing: printing temperature, extrusion width, and number of shells. A neural network model was built to predict the tensile and compressive strengths and optimize the process parameters for maximum strength. The full factorial design experiments found that higher strength is achieved at …

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Effect Of Ecap Routes On Mechanical Properties And Microstructure Of Aa6061-T4 Recycled Chips, Rawa Mohammed, Ayad Shahab Mar 2026

Effect Of Ecap Routes On Mechanical Properties And Microstructure Of Aa6061-T4 Recycled Chips, Rawa Mohammed, Ayad Shahab

Engineering and Technology Journal

Aluminum alloy finds strong suitability in automotive, sporting, goods aerospace, and weight reduction industries. Its blend of lightweight attributes and robust strength make it well-suited for crafting lightweight components and structures while upholding overall strength and performance standards. In this research, AA6061-T4 alloy chips underwent a recycling process involving hot extrusion followed by Equal Channel Angular Pressing. The influence of various routes and varied numbers of cycles on microstructure and mechanical characteristics were examined utilizing a die featuring angles of 90° and 20°. Two routes, BC and C, were scrutinized, and the outcomes displayed significant enhancements in properties for the …

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Improvement Of Performance Evaluation Using Hybrid Composite Electrode (Cu/Cr/Wc/Ag) In Electric Discharge Machining, Ahmed Abdulwahhab, Abbas Ibrahim Mar 2026

Improvement Of Performance Evaluation Using Hybrid Composite Electrode (Cu/Cr/Wc/Ag) In Electric Discharge Machining, Ahmed Abdulwahhab, Abbas Ibrahim

Engineering and Technology Journal

Electrical Discharge Machining (EDM) is a non-traditional technique widely used in various industries to remove material using electrical discharges. Finding a suitable electrode material that can resist high temperatures and efficiently remove material from the workpiece is a major difficulty in electrical discharge machining (EDM). Due to their exceptional electrical and thermal properties, composite electrodes of various metals have become extremely popular. In this study, a composite electrode (Cu-1%Cr-0.5%WC-1%Ag) manufactured using the stir casting technique will be utilized to evaluate the electrical discharge machining (EDM) process. The study compares the performance between conventional pure copper electrodes and composite electrode utilization …

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The Effect Of Calcium Carbonate-Nanoparticle On The Mechanical And Thermal Properties Of Polymers Utilizing Different Types Of Mixing And Surface Pre-Treatment: A Review Paper, Nashwan Mahmood, Mohammed Hikmat Mar 2026

The Effect Of Calcium Carbonate-Nanoparticle On The Mechanical And Thermal Properties Of Polymers Utilizing Different Types Of Mixing And Surface Pre-Treatment: A Review Paper, Nashwan Mahmood, Mohammed Hikmat

Engineering and Technology Journal

The effect of calcium carbonate nanoparticles (CaCO3) on the mechanical and thermal properties of various polymers was investigated in this review. The results were compared to scholarly research published between 2002-2022. Different polymers were evaluated, including Polypropylene (PP), High-density polyethylene (HDPE), Polyvinyl chloride (PVC), Low-density polyethylene (LDPE), Polyethylene (PE), and natural rubber (NR). Through this work, the effect of CaCO3 nanoparticles that act as fillers in polymeric materials has been reviewed. It can be concluded that mechanical and thermal properties can be decreased, increased, or unchanged by increasing and decreasing the fillers to obtain optimal results. It is reasonable to …

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Study Of Physical Properties Of Biocomposite Based On The Polymer Blends Used For Denture Base Applications, Wassan Hussain, Jawad Oleiwi, Qahtan Hamad Mar 2026

Study Of Physical Properties Of Biocomposite Based On The Polymer Blends Used For Denture Base Applications, Wassan Hussain, Jawad Oleiwi, Qahtan Hamad

Engineering and Technology Journal

In this study, two different types of polymers—Polyamide (PA) type (6) and Polyvinylpyrrolidone (PVP) type (K30), each added separately with a different weight fraction (0%, 2%, 4%, 6%) to Polymethylmethacrylate (PMMA) heat-cured resin as blend matrix—have been blended with heat-cured PMMA resin to develop the PMMA resin properties used for prosthesis complete denture. Sisal and coconut powder, two natural powders, were added separately to the polymer blend matrices with varying weight fractions (2%, 4%, 6%) to create composite specimens. Testing for density, water absorption, thermal conductivity, FTIR, and DSC were included in this study. The results show that adding reinforcing …

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Improvement Of Formability Of Aisi 1006 Sheets By Hydroforming With Die In Square Deep Drawing, Adil Jaber, Adnan Mohammed, Karem Younis Mar 2026

Improvement Of Formability Of Aisi 1006 Sheets By Hydroforming With Die In Square Deep Drawing, Adil Jaber, Adnan Mohammed, Karem Younis

Engineering and Technology Journal

An effort has been made to improve the formability of (1006) AISI steel alloy sheets in deep drawing of square-shaped parts with flat bases through hydroforming. To achieve this goal, the manufacturing process involved the use of a newly developed experimental setup for sheet hydroforming with a die, which was created by the researchers. The key design features of this setup aimed for simplicity and modularity, allowing for potential utilization with oil pressures of up to 100 MPa. The obtained results were compared with those of conventional deep drawing. Both processes were examined under specific conditions to form identical cups …

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Investigation And Prediction Of The Impact Of Fdm Process Parameters On Mechanical Properties Of Pla Prints, Mostafa Abdullah, Tahseen Abbas Mar 2026

Investigation And Prediction Of The Impact Of Fdm Process Parameters On Mechanical Properties Of Pla Prints, Mostafa Abdullah, Tahseen Abbas

Engineering and Technology Journal

Complex geometry components can be produced using FDM-based additive manufacturing (AM). In this study, the compressive and tensile strength were investigated, considering variations in layer thickness (0.2, 0.25, and 0.3 mm), density (40%, 60%, and 80%), and infill pattern (tri-hexagon, zig-zag, and gyroid). The experiment was designed using the Taguchi technique and carried out on a commercial FDM 3D printer, involving nine specimens with different processing settings. The compression standard ASTM D695 and tension standard ASTM D638-02a were used for evaluation. The results indicated that infill density significantly impacted compressive and tensile strength, contributing to 65% and 60% of the …

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Synthesis And Characterization Of Nip-Tic-Sic Nanocomposite Coating Via Electroless Process On Alumina Substrate, Rusul Abd, Abbas Hussien, Laith Abbass Mar 2026

Synthesis And Characterization Of Nip-Tic-Sic Nanocomposite Coating Via Electroless Process On Alumina Substrate, Rusul Abd, Abbas Hussien, Laith Abbass

Engineering and Technology Journal

Present-day industrial need high surface engineering quality since it deals with many material properties that are applied in modern applications. Autocatalytic plating of material surfaces enhances their mechanical and chemical properties. This study used electroless plating to create (NiP-TiC-SiC) nanocomposite coatings on alumina ceramic under various time and temperature deposition conditions to get the best performances of nanocomposite coatings. Different coating morphologies have been created, as seen in (FESEM) images. The (EDX) results show that the (NPs) were effectively integrated and that the main elements of the coating are nickel and phosphorus. The (XRD) pattern validates the existence of metallic …

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Experimental And Theoretical Analysis To Produce Pentagonal Cup In Deep Drawing Process, Zainab Mohsen, Waleed Jawad, Assel Abed Mar 2026

Experimental And Theoretical Analysis To Produce Pentagonal Cup In Deep Drawing Process, Zainab Mohsen, Waleed Jawad, Assel Abed

Engineering and Technology Journal

The manufacturing industry heavily relies on deep drawing due to its remarkable ability to produce intricate symmetrical and asymmetrical shapes with accuracy and efficiency. This research aimed to create a deep drawing tool capable of producing a pentagonal cup measuring 41mm in diameter and 30mm in height. This was achieved by conducting numerical simulations and experimental tests using two different methods. The first method involved converting an 80mm diameter circular blank into a pentagonal cup through a drawing operation, while the second method involved redrawing a cylindrical cup into a pentagonal shape. The study also analyzed the impact of these …

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The Influence Of The Inclusion Of Nano Ceramic Particles On The Pmma Composite Properties For Biomaterials Applications, Aya Shahir, Aseel Al.Zubaidi, Wafaa Salih Mar 2026

The Influence Of The Inclusion Of Nano Ceramic Particles On The Pmma Composite Properties For Biomaterials Applications, Aya Shahir, Aseel Al.Zubaidi, Wafaa Salih

Engineering and Technology Journal

This study examines the effects of reinforcing PMMA acrylic resin with different Nanoparticle types: Silica (SiO2) (67.8nm), Titania (TiO2) (57.3nm), and Talc powders (TP) (80.1nm). This was done by using the ultrasonic mixing method for dispersing the nano-powder in the matrix and using them at three different proportions (0. 5, 1, and 1.5%) to improve the properties of PMMA composite materials for medical applications. The characteristic functional groups associated with Nano-ceramic particles and PMMA in the composite specimens were confirmed by FT-IR spectroscopy. Also, this research investigates some mechanical properties, including (tensile strength, compression strength, elastic modulus, hardness, and surface …

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Dynamic Characterization Assessment And Optimization Of Reactive Powder Underwater Concrete, Doha Alsaffar, Basil Al-Shathr, Suhair Abed Mar 2026

Dynamic Characterization Assessment And Optimization Of Reactive Powder Underwater Concrete, Doha Alsaffar, Basil Al-Shathr, Suhair Abed

Engineering and Technology Journal

This study investigates the dynamic properties of Reactive Powder Underwater Concrete (RPUWC), a novel composite integrating attributes of Reactive Powder Concrete and underwater cast concrete. The study focuses on assessing the impact resistance, dynamic modulus of elasticity, rigidity, and Poisson's ratio. The influence of micro steel fibers (MS) at different volume fractions (1%, 1.25%, and 1.5%) and different anti-washout admixture (AWA) dosages (0.5 %, 0.7%, and 0.9%) are examined. The findings indicate that increasing the MS content improves crack resistance and energy absorption, resulting in a substantial 155.6% enhancement in the first crack resistance when using 1.5% MS. Additionally, ultimate …

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Single Variable Thick Plate Buckling Problems Using Double Finite Sine Transform Method, Charles Ike Mar 2026

Single Variable Thick Plate Buckling Problems Using Double Finite Sine Transform Method, Charles Ike

Engineering and Technology Journal

This paper derives buckling solutions for single variable thick plate buckling problems using the double finite sine transform method (DFSTM). The problem governing partial differential equation (GPDE), originally formulated by Shimpi and others, uses a refined plate theory (RPT) and accounts for transverse shear deformations, rendering it applicable to thick plates. The thick plate is simply supported and subjected to (i) uniform uniaxial compressive load in the x direction. (ii) uniform biaxial compressive load in the x and y axes. The DFSTM was applied to the GPDE, and the problem transformed into an algebraic equation, which was simpler in this …

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A Static And Dynamic Analysis Of A High-Speed Turbo Machine Foundation, Ameer Ahmed, Mohammed Fattah, Makki Mohsen Mar 2026

A Static And Dynamic Analysis Of A High-Speed Turbo Machine Foundation, Ameer Ahmed, Mohammed Fattah, Makki Mohsen

Engineering and Technology Journal

The foundation plays a significant role in safe and efficient turbo machinery operation. Turbomachinery generates harmonic load on the foundation due to its high-speed rotating motion, which causes vibration in the machinery foundation. Any increase in machine vibration reduces the machine's performance. In studying engineering problems, using numerical programs helps get a well-designed foundation. Before conducting a parametric study, the program used shall be validated and/or verified by conducting a series of analyses to ensure that the program output represents the reference studied cases well. In many cases, the real problem is simplified by assuming that the machine's loads are …

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Waste Rubber Pre-Treatments And Their Effects On Compressive And Flexural Strength Of Modified Sifcon, Ali Hashim, Basil Al-Shathr Mar 2026

Waste Rubber Pre-Treatments And Their Effects On Compressive And Flexural Strength Of Modified Sifcon, Ali Hashim, Basil Al-Shathr

Engineering and Technology Journal

Slurry-infiltrated fiber concrete (SIFCON) is a comparatively new and unique steel fiber-reinforced concrete (FRC) form. SIFCON possesses many desirable characteristics, including high strength and ductility. Sustainable concrete is one of the most critical types of concrete for the current environment. An enormous volume of waste rubber tires is produced globally due to the expansion of the automobile industry. This study's primary purpose is to assess the impact of employing pre-treated waste rubber tires in slurry-infiltrated fiber concrete on its flexural and compressive strengths. Based on flexural and compressive strengths, an experimental program was conducted to evaluate the flexural and compressive …

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A Proposed New Mix Proportioning Method For Fly Ash-Based Geopolymer Concrete, Mazin Alhifadhi, Tareq Al-Attar, Qais Hasan Mar 2026

A Proposed New Mix Proportioning Method For Fly Ash-Based Geopolymer Concrete, Mazin Alhifadhi, Tareq Al-Attar, Qais Hasan

Engineering and Technology Journal

Global warming on planet Earth results from the high emission of greenhouse gases, especially CO2. The Portland cement industry releases high amounts of CO2 and is responsible for about 5-8% of total emissions. Efforts have been made to look for alternative cementless binders to mitigate the impact on the environment. Geopolymers are one of the highlighted alternatives and can be obtained from the reaction of any aluminosilicate material with an alkaline solution. Aluminosilicate materials are found in byproduct materials such as fly ash. Geopolymer concrete is a promising environmentally friendly option. However, previous conventional mix proportioning methods for fly ash-based …

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Stay In Place Formwork, Encased Reinforced Concrete Column: A Review, Zainab Abbas, Maan Hassan, Iqbal Gorgis Mar 2026

Stay In Place Formwork, Encased Reinforced Concrete Column: A Review, Zainab Abbas, Maan Hassan, Iqbal Gorgis

Engineering and Technology Journal

Formwork systems are required for almost all cast-in-place concrete construction. However, some forms cost too much, often exceeding 30% of the entire cost of the concrete construction. Thus, the stay-in-place (SIP) formwork, a premanufactured permanent constructional member that holds fresh concrete to the intended sizes and stays in the site to afford loads over the construction lifecycle, could be an auspicious alternative to the classic formwork procedure. Several types of stay-in-place (SIP) formworks for columns have been reviewed, like PVC tubes, CFRP, steel tubes, and the composite of two or more types of stay-in-place (SIP) formwork used together. Moreover, some …

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Some Properties Of Sustainable Concrete With Rubber Waste Aggregate, Rafid Motloq, Wasan Khalil, Eethar Dawood Mar 2026

Some Properties Of Sustainable Concrete With Rubber Waste Aggregate, Rafid Motloq, Wasan Khalil, Eethar Dawood

Engineering and Technology Journal

The cumulative quantities of non-biodegradable solid tire waste, which are byproducts of transport vehicles, contribute to environmental pollution.. This study seeks to address this issue by investigating the impact of using this waste as a replacement for natural coarse and fine aggregate in varying ratios (10%, 15%, and 20% as coarse aggregate, and 5%, 10%, and 15% as fine aggregate by volume) to create sustainable concrete. All mixtures incorporate 10% silica fume (SF) as a cement replacement by weight. Results reveal decreased workability, fresh density, compressive, and splitting tensile strength with increasing rubber replacement proportions. However, utilizing tire rubber aggregate …

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Studying The Possibility Of Producing Paving Flags From Geopolymer Concrete Containing Local Wastes, Nazar Al- Obeidy, Wasan Khalil Mar 2026

Studying The Possibility Of Producing Paving Flags From Geopolymer Concrete Containing Local Wastes, Nazar Al- Obeidy, Wasan Khalil

Engineering and Technology Journal

Geopolymer concrete is an inorganic composite material created by interacting alkaline substances with an aluminosilicate source and aggregate. Precast building units are considered the most prominent uses of geopolymer concrete, and the utilization of recycled steel fibres and rubber from damaged tires that are non-biodegradable to reduce environmental pollution. The results of this investigation show the possibility of using geopolymer concrete with and without the inclusion of crumbed rubber and recycled steel fibers from damaged tires in the production of paving flags with dimensions of 400 × 200 × 50 mm class c according to IQS 1107. Four types of …

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Enhancing Pullout Load Performance Of Under-Reamed Piles In Homogeneous Layered Clay: A Numerical Comparative Study, Anji Al-Bayati, Mohammed Al-Neami, Falah Rahil Mar 2026

Enhancing Pullout Load Performance Of Under-Reamed Piles In Homogeneous Layered Clay: A Numerical Comparative Study, Anji Al-Bayati, Mohammed Al-Neami, Falah Rahil

Engineering and Technology Journal

A 3D numerical model generated using PLAXIS-3D software was used in the present research to predict the behavior of under-reamed piles under pullout loading conditions with presumed soil Mohr-Coulomb failure. The under-reamed pile was embedded in homogeneous, layered clay soil, with stiff clay overlain by soft clay and soft clay overlain by stiff clay. The piles were chosen per the Indian Code (IS 2911) specification, and two variables were studied: bulb provision and soil layering. Inhomogeneous clay with varying cohesion values (20, 40, and 80 kPa) and under the same conditions, the pullout capacity was improved compared to a straight …

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Studying Characteristics And Strength Of The Unsaturated Gypseous Soil With Various Saturation Degrees, Ahmed Abood, Mohammed Fattah, Aqeel Al-Adili Mar 2026

Studying Characteristics And Strength Of The Unsaturated Gypseous Soil With Various Saturation Degrees, Ahmed Abood, Mohammed Fattah, Aqeel Al-Adili

Engineering and Technology Journal

The main objective of this study is to determine the appropriateness of unsaturated gypseous soil as a subgrade layer for carrying foundations. A comprehensive laboratory testing program was implemented to investigate the geotechnical characteristics and behavior of unsaturated gypseous soil. Tests that are physical included specific gravity, classification tests, relative density, Proctor compactions, single and double oedometer collapse potential, and static triaxial compression (CU-test). Chemical testing, Scanning Electron Microscopy (SEM), and Electronic Dissipation x-ray Scanning (EDS) analyses were also carried out. The tests were performed for samples prepared at 70% relative density of the natural gypseous soil. Tests are performed …

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