Research Paper
The Influence of Shear Strain on the Torsion Capacity of Hybrid Beams
The Influence of Shear Strain on the Torsion Capacity of Hybrid Beams

Alyaa H. Mohammed; Kaiss F. Sarsam; Qais A. Hasan

Volume 38, 7A , July 2020, Page 951-959

https://doi.org/10.30684/etj.v38i7A.371

Abstract
  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 ...  Read More ...
Research Paper
Impact Strength, Flexural Modulus and Wear Rate of PMMA Composites Reinforced by Eggshell Powders
Impact Strength, Flexural Modulus and Wear Rate of PMMA Composites Reinforced by Eggshell Powders

Aseel M. Abdullah; Hussein A. Jaber; Hanaa A. Al-Kaisy

Volume 38, 7A , July 2020, Page 960-966

https://doi.org/10.30684/etj.v38i7A.384

Abstract
  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 ...  Read More ...
Research Paper
Influence of Loading Pattern Regime on Behavior of Self Compacting Concrete Voided Slab Strips under Repeated Load
Influence of Loading Pattern Regime on Behavior of Self Compacting Concrete Voided Slab Strips under Repeated Load

Ihsan A. Al-shaarbaf; Amar A. Ali; Mohammed A. Ahmed

Volume 38, 7A , July 2020, Page 967-974

https://doi.org/10.30684/etj.v38i7A.458

Abstract
  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 ...  Read More ...
Influence of Polarity of Electro Discharge Machine (EDM) on Surface Roughness (SR) and Metal Removal Rate (MRR) of Low Carbon Steel
Influence of Polarity of Electro Discharge Machine (EDM) on Surface Roughness (SR) and Metal Removal Rate (MRR) of Low Carbon Steel

Shahd Taqi; Saad K. Shather

Volume 38, 7A , July 2020, Page 975-983

https://doi.org/10.30684/etj.v38i7A.469

Abstract
  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. ...  Read More ...
Research Paper
Solar Photovoltaic Direct-Driven Air Conditioning System Performance in Iraq
Solar Photovoltaic Direct-Driven Air Conditioning System Performance in Iraq

Hashim A. Hussein; Ali H. Numan; Krar M. Kuder

Volume 38, 7A , July 2020, Page 984-991

https://doi.org/10.30684/etj.v38i7A.477

Abstract
  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 ...  Read More ...
Studying The Settlement of Backfill Sandy Soil Behind Retaining Wall Under Dynamic Loads
Studying The Settlement of Backfill Sandy Soil Behind Retaining Wall Under Dynamic Loads

Reham E. Hamdi; Mohamed Youssef Fattah; Mohammed F. Aswad

Volume 38, 7A , July 2020, Page 992-1000

https://doi.org/10.30684/etj.v38i7A.528

Abstract
  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. ...  Read More ...
Research Paper
PV/T Performance Evaluation as Electricity Generation and Hot Air Supplier for Fully and Partially Covered with PV Modules
PV/T Performance Evaluation as Electricity Generation and Hot Air Supplier for Fully and Partially Covered with PV Modules

Jalal M. Jalil; Ahmed A. Hussein; Anwar J. Faisal

Volume 38, 7A , July 2020, Page 1001-1015

https://doi.org/10.30684/etj.v38i7A.559

Abstract
  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 ...  Read More ...
Research Paper
Erosion Wear Behavior of Natural and Industrial Material for Polymer Matrix Composite by Using Taguchi Analysis
Erosion Wear Behavior of Natural and Industrial Material for Polymer Matrix Composite by Using Taguchi Analysis

Marwa S. Atallah

Volume 38, 7A , July 2020, Page 1016-1025

https://doi.org/10.30684/etj.v38i7A.558

Abstract
  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 ...  Read More ...
Research Paper
Flexural and Impact Properties of Epoxy Composites Reinforced with Peanut Shell Particles
Flexural and Impact Properties of Epoxy Composites Reinforced with Peanut Shell Particles

Hwazen Fadhil

Volume 38, 7A , July 2020, Page 1026-1033

https://doi.org/10.30684/etj.v38i7A.584

Abstract
  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 ...  Read More ...
Research Paper
Influence of Minimum Tension Steel Reinforcement on the Behavior of Singly Reinforced Concrete Beams in Flexure
Influence of Minimum Tension Steel Reinforcement on the Behavior of Singly Reinforced Concrete Beams in Flexure

Ali A. Abdulsada; Raid I. Khalel; Kaiss F. Sarsam

Volume 38, 7A , July 2020, Page 1034-1046

https://doi.org/10.30684/etj.v38i7A.902

Abstract
  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 ...  Read More ...
Research Paper
Experimental Investigation of Thermodynamics, Kinetics, and Equilibrium of Nickel Ion Removal from Wastewater Using Zinc Oxide Nanoparticles as the Adsorbent
Experimental Investigation of Thermodynamics, Kinetics, and Equilibrium of Nickel Ion Removal from Wastewater Using Zinc Oxide Nanoparticles as the Adsorbent

Shurooq T. Remedhan

Volume 38, 7A , July 2020, Page 1047-1061

https://doi.org/10.30684/etj.v38i7A.608

Abstract
  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. ...  Read More ...
Research Paper
Effect of Heating Borehole Spacing on Plasticity of Expansive Soil
Effect of Heating Borehole Spacing on Plasticity of Expansive Soil

Falah H. Rahil; Husam Baqir; Nabeel J. Tumma

Volume 38, 7A , July 2020, Page 1062-1068

https://doi.org/10.30684/etj.v38i7A.79

Abstract
  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 ...  Read More ...
Research Paper
Investigation of Cost-Influencing Factors Potentially Controllable by Main Contractors in Construction Projects in Iraq
Investigation of Cost-Influencing Factors Potentially Controllable by Main Contractors in Construction Projects in Iraq

Layth T. Ali; Raid S. Abid Ali; Zeyad S. M. Khaled

Volume 38, 7A , July 2020, Page 1069-1076

https://doi.org/10.30684/etj.v38i7A.546

Abstract
  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 ...  Read More ...
Research Paper
Hollow Fiber Ultrafiltration Membrane for Methyl Green Dye Removal
Hollow Fiber Ultrafiltration Membrane for Methyl Green Dye Removal

Saja M. Alardhi; Jamal M. Alrubaye; Talib M. Albayati

Volume 38, 7A , July 2020, Page 1077-1083

https://doi.org/10.30684/etj.v38i7A.653

Abstract
  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 ...  Read More ...
Research Paper
Synthesis and Characteristics of Acetylated Corn Cob Powder/ Unsaturated Polyester Composite
Synthesis and Characteristics of Acetylated Corn Cob Powder/ Unsaturated Polyester Composite

Assala M. Oribe; Kadhum M. Shabbeb; Ayad K. Hassan

Volume 38, 7A , July 2020, Page 1084-1095

https://doi.org/10.30684/etj.v38i7A.704

Abstract
  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. ...  Read More ...