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Digital Change Detection And Map Analysis For Urban Expansion And Land Cover Changes In Karbala City, Noor Hamed, Muthanna Al Bayati, Haidar Mohammed Aug 2026

Digital Change Detection And Map Analysis For Urban Expansion And Land Cover Changes In Karbala City, Noor Hamed, Muthanna Al Bayati, Haidar Mohammed

Engineering and Technology Journal

Urban growth driven by uncontrolled expansion is one of the greatest problems that reduces the fertile lands in Karbala Governorate, Iraq. This phenomenon is the cause for variety of urban environmental problems such as an increase in local temperature, cost of land, and loss of agricultural produce. Multiple images of different time periods were used, passing them through a series of image processing steps according to the methodology of work to achieve the aims of the paper by calculating land cover changes for Karbala City from 1992 to 2013. The aim of this research is to take the temporal and …

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Effect Of Filler Metals On Microstructure And Mechanical Properties Of Gtaw Welded Joints Of Aluminum Alloy (Aa2024-T3), Muna Abbass, Jihad Abd Ul-Qader Aug 2026

Effect Of Filler Metals On Microstructure And Mechanical Properties Of Gtaw Welded Joints Of Aluminum Alloy (Aa2024-T3), Muna Abbass, Jihad Abd Ul-Qader

Engineering and Technology Journal

This study presents an appropriate filler metal or welding electrode to join aluminum alloy (AA2024-T3) sheet of 3.2 mm thickness with a square butt joint using Gas Tungsten Arc Welding (GTAW) process. This process was carried out at three different welding currents with three various filler metals: ER4047 (12% Si), ER4043 (5% Si), and ER5356 (5% Mg). Experiments were conducted to investigate the microstructure and the mechanical properties. The effect of various filler metals upon the weld joints quality were analyzed via an X-ray radiographic and tensile test. Hardness test, microstructures, SEM, and XRD also conducted to the welded specimens. …

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Effect Of Powder-Mixed Dielectric On Edm Process Performance, Safa Fadhil, Shukry Aghdeab Aug 2026

Effect Of Powder-Mixed Dielectric On Edm Process Performance, Safa Fadhil, Shukry Aghdeab

Engineering and Technology Journal

Electrical Discharge Machining (EDM) is extensively used to manufacture different conductive materials, including difficult to machine materials with intricate profiles. Powder Mixed Electro-Discharge Machining (PMEDM) is a modern innovation in promoting the capabilities of conventional EDM. In this process, suitable materials in fine powder form are mixed in the dielectric fluid. An equal percentage of graphite and silicon carbide powders have been mixed together with the transformer oil and used as the dielectric media in this work. The aim of this study is to investigate the effect of some process parameters such as peak current, pulse-on time, and powder concentration …

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The Hybrid (Pvt) Double-Pass System With A Mixed-Mode Solar Dryer For Drying Banana, Abdullateef Jadallah, Mohammed Alsaadi, Saifalddeen Hussien Aug 2026

The Hybrid (Pvt) Double-Pass System With A Mixed-Mode Solar Dryer For Drying Banana, Abdullateef Jadallah, Mohammed Alsaadi, Saifalddeen Hussien

Engineering and Technology Journal

This paper proposes a developed numerical and experimental design of a hybrid Photovoltaic-Thermal (PVT) double-pass counter-flow system connected with the mixed-mode solar dryer system. The mixed-mode solar dryer considers the most efficient mode because it has two heat sources, from solar radiation and the hot airflow which is supplied by the PVT system. The PVT system is often unused for drying applications; therefore, the whole proposed PVT solar system in this work is utilized for drying applications. This system is not only massive fuel savings, but also crucial to improve the quality of the dried product in terms of color, …

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Direct Current Deadbeat Predictive Controller For Bldc Motor Using Single Dc-Link Current Sensor, Qaed Ali, Mohammed Ezzaldean Aug 2026

Direct Current Deadbeat Predictive Controller For Bldc Motor Using Single Dc-Link Current Sensor, Qaed Ali, Mohammed Ezzaldean

Engineering and Technology Journal

BLDC motors are characterized by electronic commutation, which is performed by using an electric three-phase inverter. The direct control system of the BLDC motor consists of double loops; including the inner-loop for current regulating and outer-loop for speed control. The operation of the current controller requires feedback of motor currents; the conventional current controller uses two current sensors on the ac side of the inverter to measure the currents of two phases, while the third current would be accordingly calculated. These two sensors should have the same characteristics, to achieve balanced current measurements. It should be noted that the sensitivity …

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Simulation Design Of Blood-Pump Intelligent Controller Based On Pid-Like Fuzzy Logic Technique, Raghda Raheem, Mohammed Y., Saleem Kadhim Aug 2026

Simulation Design Of Blood-Pump Intelligent Controller Based On Pid-Like Fuzzy Logic Technique, Raghda Raheem, Mohammed Y., Saleem Kadhim

Engineering and Technology Journal

This paper presents a blood pump with a bearingless brushless DC motor, supported by speed, torque, and suspension force controllers. Simulation of the pump motor and its controllers tested by MATLAB/Simulink. Two Proportional plus Integral (PI) controllers are employed for controlling the rotational speed and torque of the motor. For controlling the suspension force a comparative study is presented between the Proportional plus Integral plus Derivative (PID) controller and two inputs PID-like Fuzzy Logic Controller (FLC). A particle swarm optimization technique is used to find the best values for the controller’s parameters. The results of the speed and torque controllers …

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Experimental Study On Performance And Emission Characteristic Of Diesel Engine Using Sunflower Oil Biodiesel Blends, Ghassan Ali, Abed Al-Kadim Hassan Aug 2026

Experimental Study On Performance And Emission Characteristic Of Diesel Engine Using Sunflower Oil Biodiesel Blends, Ghassan Ali, Abed Al-Kadim Hassan

Engineering and Technology Journal

Biodiesel fuel is a liquid biofuel produced by chemical process form new and used phytogenic oils, animal fats. Biodiesel fuels can be utilization alone or mixing with the pure diesel at different proportion. In the present work a diesel engine type (FIAT) , four cylinder, variable speed, direct injection was operated by sunflower oil methyl ester , biodiesel at different blend ratio . five different ratio of biodiesel blends 10%, 20%, 30%, 40%, and 50% by volume is used in this study and compared with using of pure diesel at variable loads and variable engine speed. The effect of biodiesel …

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Removal Of Iron From Produced Water Using Silica Adsorbent Material, Zamen Mekhelf, Akeel Subhi, Ramzy Hamied Aug 2026

Removal Of Iron From Produced Water Using Silica Adsorbent Material, Zamen Mekhelf, Akeel Subhi, Ramzy Hamied

Engineering and Technology Journal

The removal of Iron from produced water using adsorbent materials is taking a space of attention from the perspective of researchers. In this work, the characterization of chemically modified silica used as Iron ions adsorbent using Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), laser granularity instrument was performed. The point of zero charge (PZC) of modified silica was determined using titration method. Different parameters were used to better approach Iron removal. These parameters are 0.2 and 0.4 mg/l modified silica adsorbent dose, 30-180 min adsorption time and pH values of 4-10. The results showed that modified silica exhibited …

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Optimization Of Plasma Cutting Parameters On Dimensional Accuracy And Machining Time For Low Carbon Steel, Sami Hamood, Vian Najm Aug 2026

Optimization Of Plasma Cutting Parameters On Dimensional Accuracy And Machining Time For Low Carbon Steel, Sami Hamood, Vian Najm

Engineering and Technology Journal

This work aims to study the influence of plasma arc cutting parameters on dimensional accuracy and machining time for mild steel (1010) material with the thickness (4 mm). Selected three cutting parameters (arc current, cutting speed, and arc distance) or the experimental work. 12 tests have been performed at each test one parameter has been changed with four various levels and other parameters are constant. The influence of the cutting parameters on response results (dimensional accuracy and machining time) have been studied and analyzed by using response surface methodology (RSM) using the second-order model and main effect plot have been …

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Prediction Of Surface Roughness And Optimization Of Cutting Parameters In Cnc Turning Of Rotational Features, Yousif Shounia, Tahseen Abaas, Raed Shwaish Aug 2026

Prediction Of Surface Roughness And Optimization Of Cutting Parameters In Cnc Turning Of Rotational Features, Yousif Shounia, Tahseen Abaas, Raed Shwaish

Engineering and Technology Journal

This research presents a model for prediction surface roughness in terms of process parameters in turning aluminum alloy 1200. The geometry to be machined has four rotational features: straight, taper, convex and concave, while a design of experiments was created through the Taguchi L25 orthogonal array experiments in minitab17 three factors with five Levels depth of cut (0.04, 0.06, 0.08, 0.10 and 0.12) mm, spindle speed (1200, 1400, 1600, 1800 and 2000) r.p.m and feed rate (60, 70, 80, 90 and 100) mm/min. A multiple non-linear regression model has been used which is a set of statistical extrapolation processes to …

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Improve The Micro-Hardness Of Single Point Incremental Forming Product Using Magnetic Abrasive Finishing, Baqer Ahmed, Saad Shather, Wisam Hamdan Aug 2026

Improve The Micro-Hardness Of Single Point Incremental Forming Product Using Magnetic Abrasive Finishing, Baqer Ahmed, Saad Shather, Wisam Hamdan

Engineering and Technology Journal

In this paper the Magnetic Abrasive Finishing (MAF) was utilized after Single Point Incremental Forming (SPIF) process as a combined finishing process. Firstly, the Single Point Incremental forming was form the truncated cone made from low carbon steel (1008-AISI) based on Z-level tool path then the magnetic abrasive finishing process was applied on the surface of the formed product. Box-Behnken design of experiment in Minitab 17 software was used in this study. The influences of different parameters (feed rate, machining step size, coil current and spindle speed) on change in Micro-Vickers hardness were studied. The maximum and minimum change in …

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Preparation And Study Of Flexural Strength And Impact Strength For Hybrid Composite Materials Used In Structural Applications, Teeb Mohameed, Sihama Salih, Wafaa Salih Aug 2026

Preparation And Study Of Flexural Strength And Impact Strength For Hybrid Composite Materials Used In Structural Applications, Teeb Mohameed, Sihama Salih, Wafaa Salih

Engineering and Technology Journal

Many of the polymeric materials used for structural purposes have weak mechanical properties, these characteristics can therefore be improved by preparing a hybrid laminar composite. In this work use melting mixing method using screw extruder to prepare sheets of polymer blends and nanocomposites based on polymer blends, and using a hot hydraulic press machine to prepared hybrid laminates composites. Two groups of hybrid laminar composites were prepared, the first group is consist of [((94%PP: 5%PMMA: 1 %( PP-g-MA)): 0.3% ZrO2): 6%KF and 8%KF] and the second group is [((94%PP: 5%UHMWPE: 1 %( PP-g-MA)): 0.3% ZrO2): 6%KF and 8%KF]. The results …

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Influence Of Nanocermic On Some Properties Of Polyetheretherketone Based Biocomposites, Alaa Mohammed, Jawad Oleiwi, Emad Al-Hassani Aug 2026

Influence Of Nanocermic On Some Properties Of Polyetheretherketone Based Biocomposites, Alaa Mohammed, Jawad Oleiwi, Emad Al-Hassani

Engineering and Technology Journal

Polyetheretherketone (PEEK) materials belong to a group of high-performance thermoplastic polymers thermoplastic that has been proposed as a substitute for metals in biomaterials. In this research, in order to improve the performances of PEEK, nano titanium dioxide (n-TiO2) and nano-hydroxyapatite (n-HAp) were incorporated into PEEK loading up to (1.5 wt%) to fabricate PEEK composites by using a method of melt-blending and hot compressing. Properties, such as compression, density, the morphology of fracture, and element analysis were examined for preparing samples. The results showed that the compression and density properties improved with increased weight fraction for two types of reinforcement, but …

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Evaluation Of Mechanical Properties And Finite Element Modeling In Friction Stir Welding Of C12200 Copper Alloy To C36000 High-Leaded Brass Pipe, Ahmed Akber, Ali Khleif, Abbas Hasein Aug 2026

Evaluation Of Mechanical Properties And Finite Element Modeling In Friction Stir Welding Of C12200 Copper Alloy To C36000 High-Leaded Brass Pipe, Ahmed Akber, Ali Khleif, Abbas Hasein

Engineering and Technology Journal

In systems transporting fluids like petrol, water, or any fluids. Copper and brass pipes are used because of the capability to resist corrosion. The copper alloys can be welded by several methods like arc, resistance, friction welding, and gas methods and they can be readily soldered and brazed. In the present study, mechanical properties and finite element modeling evaluation for friction stir welding of two dissimilar pipes (C12200 copper alloy pipe with C36000 copper alloy pipe). During this study six parameters were used where rotation speed of (775,1000,1300 and1525rpm), welding speed of 1.7 mm/min, axial force of 8.5KN, with a …

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Mechanical Properties Of Martensitic Stainless Steel (Aisi420) Subjected To Conventional And Cryogenic Treatments, Hareer Mohamed, Ali Ataiwi, Jamal Dawood Aug 2026

Mechanical Properties Of Martensitic Stainless Steel (Aisi420) Subjected To Conventional And Cryogenic Treatments, Hareer Mohamed, Ali Ataiwi, Jamal Dawood

Engineering and Technology Journal

Martensitic Stainless Steel (AISI420) MSS are vastly used because of their properties conventional which mix good mechanical and corrosion resistance. Cryogenic up to -196°C for different soaking time and heat treatments at (1000,500,200°C) for 15 minutes is one of the ways that used to enhance mechanical properties of these steels by means transformation of retained austenite, deformation regarding martensite then carbide refinement. the result showed an increase in tensile strength of samples that were treated cryogenically and tempered at 500°C was 933 (MPa) compared to samples that just treated conventionally in austenitizing and tempering at the same temperature that was …

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Hollow Fiber Ultrafiltration Membrane For Methyl Green Dye Removal, Saja Alardhi, Jamal Alrubaye, Talib Albayati Aug 2026

Hollow Fiber Ultrafiltration Membrane For Methyl Green Dye Removal, Saja Alardhi, Jamal Alrubaye, Talib Albayati

Engineering and Technology Journal

In this study, the behavior of a Polyvinyl chloride (18 wt % PVC) hollow fiber ultrafiltration (UF) membrane for methyl green (MG) dye removal from aqueous solution was estimated by studying the influence of varying the operation conditions (the concentration of the dye and volumetric flow rate) to determine their impact on the separation processes (permeate flux and rejection coefficient) at constant pressure and temperature. The PVC membrane was characterized by scanning electron microscopy. Furthermore, tests of the UF were carried out with pure water and MG aqueous solutions as feed. Outcomes explained a notable influence of feed concentration and …

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Synthesis And Characteristics Of Acetylated Corn Cob Powder/ Unsaturated Polyester Composite, Assala Oribe, Kadhum Shabbeb, Ayad Hassan Aug 2026

Synthesis And Characteristics Of Acetylated Corn Cob Powder/ Unsaturated Polyester Composite, Assala Oribe, Kadhum Shabbeb, Ayad Hassan

Engineering and Technology Journal

In this research, the composite material was prepared from untreated and treated corn cob powder by acetylation process and the physical and mechanical properties have been studied. Cellulose is extracted using the Kürchner-Hoffer method and then acetylated. Untreated corn cob powder and Acetylated corn cob powder were mixed with unsaturated polyester resin in different concentrations (0, 1, 2, and 3 wt. %). The Mechanical and the physical test results showed that there is an enhanced in mechanical properties (Tensile, Impact, Hardness, and Bending) with the treatment (Acetylation) by increasing treated corn cob powder mass fraction (1, 2, and 3wt. %) …

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Investigation Of Cost-Influencing Factors Potentially Controllable By Main Contractors In Construction Projects In Iraq, Layth Ali, Raid Abid Ali, Zeyad Khaled Aug 2026

Investigation Of Cost-Influencing Factors Potentially Controllable By Main Contractors In Construction Projects In Iraq, Layth Ali, Raid Abid Ali, Zeyad Khaled

Engineering and Technology Journal

Cost overrun in construction projects is a common phenomenon in Iraq. This might occur due to diversity of factors. This study aims to identify the factors influencing construction projects cost that are potentially controllable by main contractors. A field study through a questionnaire survey was directed to a sample of related Iraqi professional engineers from general contracting companies at both public and private sectors. Their opinions on the impact and frequency of each factor were investigated. The questionnaire offered (59) factors classified in (8) categories namely; legislations, financial and economic, design, contractual, site management, material, labor and equipment. The factors …

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Effect Of Heating Borehole Spacing On Plasticity Of Expansive Soil, Falah Rahil, Husam Baqir, Nabeel Tumma Aug 2026

Effect Of Heating Borehole Spacing On Plasticity Of Expansive Soil, Falah Rahil, Husam Baqir, Nabeel Tumma

Engineering and Technology Journal

This paper presents the effect of spacing between boreholes heating on plasticity of expansive soils. The expansive soils used were prepared artificially by mixing Kut clay with different percentages of bentonite. Nine laboratory models of expansive soils having dry unit weight of 17.8 kN/m3 with 6% initial water content were prepared inside a steel box of (300 mm × 300 mm × 400 mm height). A special heating system generates 400 Co for six hours was designed and manufactured for this purpose using 12 mm diameter electric heaters inserted through boreholes. Square pattern boreholes of 170 mm length with spacing …

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Experimental Investigation Of Thermodynamics, Kinetics, And Equilibrium Of Nickel Ion Removal From Wastewater Using Zinc Oxide Nanoparticles As The Adsorbent, Shurooq Remedhan Aug 2026

Experimental Investigation Of Thermodynamics, Kinetics, And Equilibrium Of Nickel Ion Removal From Wastewater Using Zinc Oxide Nanoparticles As The Adsorbent, Shurooq Remedhan

Engineering and Technology Journal

In the present study commercial zinc oxide (ZnO) nanoparticles in the size of 30 nm were utilized as an adsorbent for the removal of Ni (II) ion from synthetic waste aqueous solution. Adsorption capacity of ZnO for removing Ni (II) ions from aqueous solutions was measured at different pH, adsorbent dose, contact time, temperature and metal ion concentration. Moreover,  adsorption isotherms, kinetics and thermodynamics were studied to understand  the  nature  and  mechanism  of  adsorption. ZnO nanoparticles were characterized by X-Ray diffract analysis(XRD),Fourier Transform Infrared Spectroscopy(FT-IR), scanning electron microscopy (SEM),energy dispersive X-ray spectroscopy(EDS) and Brunauer-Emmett-Teller (BET). The maximum amount of Ni …

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Influence Of Minimum Tension Steel Reinforcement On The Behavior Of Singly Reinforced Concrete Beams In Flexure, Ali Abdulsada, Raid Khalel, Kaiss Sarsam Aug 2026

Influence Of Minimum Tension Steel Reinforcement On The Behavior Of Singly Reinforced Concrete Beams In Flexure, Ali Abdulsada, Raid Khalel, Kaiss Sarsam

Engineering and Technology Journal

The requirements of minimum flexural reinforcement in the last decades have been a reason for controversy. The structural behavior of beams in bending is the best way of investigating and evaluating the minimum reinforcement in flexure. For this purpose, twelve singly reinforced concrete beams with a rectangular cross-section of (125 mm) width by (250 mm) height and (1800 mm) length were cast and tested under two-point loads up to failure. These beams were divided into three groups with different compressive strengths (25, 50, and 80 MPa). Each group consists of four beams with different amounts of tension steel reinforcement approximately …

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Flexural And Impact Properties Of Epoxy Composites Reinforced With Peanut Shell Particles, Hwazen Fadhil Aug 2026

Flexural And Impact Properties Of Epoxy Composites Reinforced With Peanut Shell Particles, Hwazen Fadhil

Engineering and Technology Journal

Natural materials have been extensively used as reinforcements in polymer matrices instead of non-degradable synthetic reinforcement such as carbon, glass or aramid. The use is because of their low density, good mechanical properties, availability, and biodegradability. Peanut shell is one such natural waste filler used, and it contains cellulose, hemicellulose, and lignin. Natural fiber/particle sources are not only strong and lightweight but are relatively very cheap. This paper offers the comparison of the flexural, and impact energy test properties of the peanut shell reinforced with the epoxy resin matrix. Peanut shells add into the epoxy resin matrix with various weight …

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Pv/T Performance Evaluation As Electricity Generation And Hot Air Supplier For Fully And Partially Covered With Pv Modules, Jalal Jalil, Ahmed Hussein, Anwar Faisal Aug 2026

Pv/T Performance Evaluation As Electricity Generation And Hot Air Supplier For Fully And Partially Covered With Pv Modules, Jalal Jalil, Ahmed Hussein, Anwar Faisal

Engineering and Technology Journal

The solar energy system is environmentally friendly and the utilization of photovoltaic thermal collectors, (PV/T) has attracted more attention, which directly converts solar radiation into electricity and thermal energy simultaneously. This study investigated the air biased Photovoltaic thermal hybrid solar collectors, (PV/T) trend for two cases, denominate case one (PV/T system fully covered with PV modules), and case tow (PV/T system partially covered with glass). The studied parameters were solar irradiance and the air mass flow rate. The investigation has been performed in terms of outlet air temperature, electrical power, thermal and electrical efficiencies. A numerical model was developed using …

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Erosion Wear Behavior Of Natural And Industrial Material For Polymer Matrix Composite By Using Taguchi Analysis, Marwa Atallah Aug 2026

Erosion Wear Behavior Of Natural And Industrial Material For Polymer Matrix Composite By Using Taguchi Analysis, Marwa Atallah

Engineering and Technology Journal

The behavior of the erosion wear for samples manufactured by hand layup method of epoxy-supported fiberglass, eggshells and calcium carbonate particles were investigated. The test was performed in accordance with the experimental designs Taguchi (L 9) MINITAB (19) to select samples that have the resistance to erosion under the influence of factors. The erosion rate was assessed under the influence of three factors: weight fraction (2% to 8% eggshells and CaCO3 particles), sand size (450, 650, 850 μm) and angles (30º, 60º, 90º) with a fixed face distance of 30 cm, 10 hours and a flow rate of 45 L/min. …

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Studying The Settlement Of Backfill Sandy Soil Behind Retaining Wall Under Dynamic Loads, Reham Hamdi, Mohamed Fattah, Mohammed Aswad Aug 2026

Studying The Settlement Of Backfill Sandy Soil Behind Retaining Wall Under Dynamic Loads, Reham Hamdi, Mohamed Fattah, Mohammed Aswad

Engineering and Technology Journal

For a long time, the seismic examination of retaining walls has been contemplated by a few strategies dependent on the basic augmentation of Coulomb's limit equilibrium investigation. These techniques cannot gauge the removal of the refill soil upheld by the wall. A trial examination is completed to contemplate the vertical settlement on sandy soil under dynamic loads with other burden amplitudes, vibration frequencies, relative density, and various separations between the establishment and holding divider. The model balance utilized in this investigation is square. Dynamic burden test is done on cohesion less soil with three burden amplitudes (0.25 ton, 0.5 ton …

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Solar Photovoltaic Direct-Driven Air Conditioning System Performance In Iraq, Hashim Hussein, Ali Numan, Krar Kuder Aug 2026

Solar Photovoltaic Direct-Driven Air Conditioning System Performance In Iraq, Hashim Hussein, Ali Numan, Krar Kuder

Engineering and Technology Journal

The present research_paper is on photovoltaic air conditioning system using the direct drive method. The experimental system setup arranged in Iraq at Al-taje site at longitude 44.34 and latitude 33.432 during the summer season inside a room. The proposed off-grid system consists of an array of photovoltaic, battery used to store power, PWM (pulse width modulation) charge controller, and DC air cooler. During the examination of the system, proven success of this new type(dc air conditioner ) of client urges Iraq warm conditions as an alternative type used instead of the prevailing types of air conditioners (AC air conditioner )in …

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Influence Of Polarity Of Electro Discharge Machine (Edm) On Surface Roughness (Sr) And Metal Removal Rate (Mrr) Of Low Carbon Steel, Shahd Taqi, Saad Shather Aug 2026

Influence Of Polarity Of Electro Discharge Machine (Edm) On Surface Roughness (Sr) And Metal Removal Rate (Mrr) Of Low Carbon Steel, Shahd Taqi, Saad Shather

Engineering and Technology Journal

Electro discharge machining (EDM) is one of a thermal process that is used for remove of metal from the workpiece by spark erosion. The work of this machine depends on multiple variables. One of the more influential variants on this machine is the change of polarity and the use of this variable is not wide and the research depends on the polarity of the machinist. Essentially, the polarity of the tool (electrode) is positive and the workpiece is negative, this polarity can be reversed. This paper focuses on the influence of changing the polarity (positive and negative) on the surface …

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Influence Of Loading Pattern Regime On Behavior Of Self Compacting Concrete Voided Slab Strips Under Repeated Load, Ihsan Al-Shaarbaf, Amar Ali, Mohammed Ahmed Aug 2026

Influence Of Loading Pattern Regime On Behavior Of Self Compacting Concrete Voided Slab Strips Under Repeated Load, Ihsan Al-Shaarbaf, Amar Ali, Mohammed Ahmed

Engineering and Technology Journal

This study presents an experimental approach to investigate the structural behavior of normal and moderately high strength Self Compacted Concrete (SCC) voided slab strips under repeated loading system. The experiments were carried out on eight one-way simply supported slabs. Four of them have been tested under two types of repeated loading regime. The required number of cycles of the first load pattern (R1) to achieve permanent damage in the slab is more than 40 cycles, while the second type of repeated loading regime (R2) requires more than 20 cycles to achieve complete damage in the slab for the selected loading …

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The Influence Of Shear Strain On The Torsion Capacity Of Hybrid Beams, Alyaa Mohammed, Kaiss Sarsam, Qais Hasan Aug 2026

The Influence Of Shear Strain On The Torsion Capacity Of Hybrid Beams, Alyaa Mohammed, Kaiss Sarsam, Qais Hasan

Engineering and Technology Journal

This research discusses experimentally the shear strain of the reinforcement concrete hybrid beams composed of reactive powder concrete (RPC) at the peripheral and conventional concrete (CC) at the core beams under torsional strength tests. Shear strain is usually represented by is explained as the tangent of the angle and is be like the length of deformation at its maximum divided by the length of perpendicular in the plane of the force application. Twelve reinforced concrete beams are tested having the following dimensions: 100, 200 and 1500mm as width, height and length respectively with thickness of the RPC concrete were 40 …

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Impact Strength, Flexural Modulus And Wear Rate Of Pmma Composites Reinforced By Eggshell Powders, Aseel Abdullah, Hussein Jaber, Hanaa Al-Kaisy Aug 2026

Impact Strength, Flexural Modulus And Wear Rate Of Pmma Composites Reinforced By Eggshell Powders, Aseel Abdullah, Hussein Jaber, Hanaa Al-Kaisy

Engineering and Technology Journal

In the present study, the impact strength, flexural modulus, and wear rate of poly methyl methacrylate (PMMA) with eggshell powder (ESP) composites have been investigated. The PMMA used as a matrix material reinforced with ESP at two different states (including untreated eggshell powder (UTESP) and treated eggshell powder (TESP)). Both UTESP and TESP were mixed with PMMA at different weight fractions ranged from (1-5) wt.%. The results revealed that the mechanical properties of the PMMA/ESP composites were enhanced steadily with increasing eggshell contents. The samples with 5 wt.% of UTESP and TESP additions give the maximum values of impact strength, …

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