Performance of potato starch admixture on fresh and hardened behaviours of concrete at varied mix design ratios
Performance of potato starch admixture on fresh and hardened behaviours of concrete at varied mix design ratios

Chidobere David Nwa-David

Articles in Press, Corrected Proof, Available Online from 12 February 2024

https://doi.org/10.30684/etj.2024.145272.1654

Abstract
  The urgency to attenuate techno-economic and ecological threats constituted by chemical admixtures has necessitated the adoption of feasible natural admixtures. The chemical interaction ...  Read More ...
Uncracked Palm Kernel Shell Effect on Compressive Strength of Concrete
Uncracked Palm Kernel Shell Effect on Compressive Strength of Concrete

Chidiebere S. Ezenkwa; Thaddeus I. Elogu

Volume 41, Issue 11 , November 2023, , Page 1266-1273

https://doi.org/10.30684/etj.2023.140014.1460

Abstract
  In recent times, the production of concrete has become a significant concern due to the rapid population growth and the depletion of raw materials. In this research, we investigated ...  Read More ...
Stay in Place Formwork, Encased Reinforced Concrete Column: A Review
Stay in Place Formwork, Encased Reinforced Concrete Column: A Review

Zainab H. Abbas; Maan S. Hassan; Iqbal N. Gorgis

Volume 41, Issue 11 , November 2023, , Page 1355-1378

https://doi.org/10.30684/etj.2023.139421.1428

Abstract
  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. ...  Read More ...
Prediction of Fresh and Hardened Properties of Concrete Containing Nanostructured Cassava Peel Ash Using Ibearugbulem's Approach
Prediction of Fresh and Hardened Properties of Concrete Containing Nanostructured Cassava Peel Ash Using Ibearugbulem's Approach

Chidobere D. Nwa-David; David O. Onwuka; Fidelis C. Njoku; Owus M. Ibearugbulem

Volume 41, Issue 5 , May 2023, , Page 652-665

https://doi.org/10.30684/etj.2023.138099.1374

Abstract
  Statistical methods such as Scheffe’s and Osadebe’s models are commonly employed for the optimization of concrete properties. Despite their prediction suitability, attention ...  Read More ...
Optimization of Silica Fume and Slag in Roller Compacted Concrete by Taguchi Method
Optimization of Silica Fume and Slag in Roller Compacted Concrete by Taguchi Method

Ziyad M. Abed; Hisham K. Ahmed; Wasan I. Khalil

Volume 41, Issue 5 , May 2023, , Page 724-733

https://doi.org/10.30684/etj.2023.138600.1411

Abstract
  Roller Compacted Concrete Pavement (RCCP) is one type of concrete poured and compacted with the same machines utilized to construct heavy-duty pavements, log sorting, and parking. In ...  Read More ...
Nonlinear 3D Finite Element Model for Round Composite Columns under Various Eccentricity Loads
Nonlinear 3D Finite Element Model for Round Composite Columns under Various Eccentricity Loads

Dara A. Mawlood; Serwan K. Rafiq

Volume 40, Issue 11 , November 2022, , Page 1605-1614

https://doi.org/10.30684/etj.2022.133106.1168

Abstract
  Composite columns are often used in constructing high-rise structures because they can reduce the size of a building's columns while increasing the usable area in the floor plan. This ...  Read More ...
Effect of domestic dry sewage sludge on concrete compressive strength
Effect of domestic dry sewage sludge on concrete compressive strength

Alaa R. Al-Obaidi; Riyad H. Al-Anbari; maan S. hassan

Volume 40, Issue 5 , May 2022, , Page 832-839

https://doi.org/10.30684/etj.2021.131284.1022

Abstract
  The possibility of saving and sustaining natural materials by reusing waste is one of the most important goals researchers seek to achieve and prove its effectiveness and positive impact ...  Read More ...
The Effect of Process Parameters on the Compression Property of Acrylonitrile Butadiene Styrene Produced by 3D Printer
The Effect of Process Parameters on the Compression Property of Acrylonitrile Butadiene Styrene Produced by 3D Printer

Sabreen A. Oudah; Hind B. Al-Attraqchi; Nassir A. Nassir

Volume 40, Issue 1 , January 2022, , Page 189-194

https://doi.org/10.30684/etj.v40i1.2118

Abstract
  Additive manufacturing (AM) by Fused Deposition Modelling (FDM) provides an innovative manufacturing method for complex geometry components. 3D printers have become easily accessible ...  Read More ...
Effect of Adding Polypropylene Fibers in Met kaolin-Based Geopolymer Concrete
Effect of Adding Polypropylene Fibers in Met kaolin-Based Geopolymer Concrete

Qais J. Frieh; Mushtaq H. Kamil

Volume 39, Issue 12 , December 2021, , Page 1814-1820

https://doi.org/10.30684/etj.v39i12.2224

Abstract
  Geopolymer is a binder material that was created as a result of efforts to decrease Portland cement's negative environmental effects.  Geopolymer concrete shares certain properties ...  Read More ...
Effect of Inclination of Rectangular Reinforced Concrete Short Columns on the Confinement
Effect of Inclination of Rectangular Reinforced Concrete Short Columns on the Confinement

Eyad K. Sayhood; Bassman R. Muhammed; Ahmed A. Hatem

Volume 39, Issue 12 , December 2021, , Page 1821-1827

https://doi.org/10.30684/etj.v39i12.437

Abstract
  The main objective of this paper is to study the confinement of the rectangular reinforced concrete short inclined columns. This paper was based on theoretical analysis using the MATLAB ...  Read More ...
Optimum Steel Fiber Content of High Strength Pozzolime Concrete
Optimum Steel Fiber Content of High Strength Pozzolime Concrete

Sabreen M. Hamza; Ahmed Sh. J. Al-Zuheriy; Sabreen M. Hamza

Volume 39, Issue 12 , December 2021, , Page 1869-1874

https://doi.org/10.30684/etj.v39i12.2213

Abstract
  Pozzolime is a promising alternative binder, compared to Portland cement because of its low CO2 emission. it is produced by mixing hydrated lime, silica fume, and fly ash. Fiber is ...  Read More ...
Study of the Mechanical Properties of Jute Fiber Reinforced Cement Composites
Study of the Mechanical Properties of Jute Fiber Reinforced Cement Composites

Lamees S. Faiq

Volume 36, 12A , December 2018, , Page 1244-1248

https://doi.org/10.30684/etj.36.12A.5

Abstract
  The study results show the use of jute fibers to develop a low cost material for wall panels, roofs and other construction board. The study has been investigates the cement mechanical ...  Read More ...
Effect of Using Plastic and Rubber Wastes as Fine Aggregate on Some Properties of Cement Mortar
Effect of Using Plastic and Rubber Wastes as Fine Aggregate on Some Properties of Cement Mortar

Basil S. Al-Shathr; Iqbal N. Gorgis; Rafid F. Motlog

Volume 34, 8A , August 2016, , Page 1688-1699

https://doi.org/10.30684/etj.34.8A.18

Abstract
  This research describes the production of lightweight cement mortar using four types of fine aggregates including chopped rubber tires, chopped plastic wastes, a mixture from the previous ...  Read More ...
Thermal Properties of Recycle Aggregate Concrete with Different Densities
Thermal Properties of Recycle Aggregate Concrete with Different Densities

Amer M. Ibrahim; Shakir A. Al-Mishhadani; Noor Al Huda H. Ahmed

Volume 33, 9A , December 2015, , Page 2027-2038

https://doi.org/10.30684/etj.2015.116221

Abstract
  The present research intended to determine thermal properties (thermalconductivity, thermal diffusivity and specific heat) of concrete manufactured by recycle waste of clay brick and ...  Read More ...
New Technique for Producing Vacuum Concrete
New Technique for Producing Vacuum Concrete

Haitham Hazim Saeed; Anas Amjed Ezzulddin

Volume 33, 3A , April 2015, , Page 659-667

https://doi.org/10.30684/etj.33.3A.11

Abstract
  In this work a new technique is used to produce vacuum dewatered concrete. In this technique perforated PVC pipes encased in cotton cloth are used to dewater concrete from inside of ...  Read More ...
Investigate and Comparison Effect add Amorphous and Crystalline - Nano SiO2 on Properties of Concrete
Investigate and Comparison Effect add Amorphous and Crystalline - Nano SiO2 on Properties of Concrete

Rami Joseph Aghajan Sldozian

Volume 33, 3B , March 2015, , Page 547-555

https://doi.org/10.30684/etj.33.3B.14

Abstract
  In this paper, the study included the comparison between amorphous silica and crystalline silica (quartz), and with nano scale size, two types of silicawere added to concrete by ratios ...  Read More ...
Effect of Practical Curing Methods on the Properties of Roller Compacted Concrete
Effect of Practical Curing Methods on the Properties of Roller Compacted Concrete

Hisham K. Ahmed; Intesar Kadhim Gata

Volume 33, 2A , February 2015, , Page 500-511

https://doi.org/10.30684/etj.33.2A.20

Abstract
  Roller Compacted Concrete (RCC) is a technology characterized mainly by the use of rollers for compaction. This construction method permits considerable reduction in costs and construction ...  Read More ...
Effect of Using Windows Waste Glass as Coarse Aggregate on Some Properties of Concrete
Effect of Using Windows Waste Glass as Coarse Aggregate on Some Properties of Concrete

Abdelmaseeh Bakos Keryou; Gailan Jibrael Ibrahim

Volume 32, Issue 6 , July 2014, , Page 1519-1529

https://doi.org/10.30684/etj.32.6A.14

Abstract
  In this experimental study, local waste glass (WG) gathered from Turkey-made windows glass has been used as a partial replacement of coarse aggregates with 0, 20, 25, and 30% percentages ...  Read More ...
Effect of Rubber Treated by Acidic Solution On Some Mechanical Properties of Rubberize Cement Mortar
Effect of Rubber Treated by Acidic Solution On Some Mechanical Properties of Rubberize Cement Mortar

Aziz Ibrahim Abdulla; Salwa Hadi Ahmed

Volume 29, Issue 13 , September 2011, , Page 2793-2806

https://doi.org/10.30684/etj.29.13.17

Abstract
  In the present work, the properties of rubberize cement mortar containingcrumb rubber treated by acidic solution are tested and compared with normal rubberize and normal cement mortar.The ...  Read More ...
One Parameter Composite Semigroups of Linear Bounded Operators in Strong Operator Topology of Schatten Class Cp
One Parameter Composite Semigroups of Linear Bounded Operators in Strong Operator Topology of Schatten Class Cp

Samir Kasim Hassan; Al-Taie M; Al-Malki Anam; Al-Attar Abeer; Mustafa Khaleel Ismael; Fatema Ahmed Sadeq; Radhi A .Zboon; Jehad R.Kider; Samir K .Hassan; Hussain J. M. Alalkawi; Raad H. Majid; Rawaa A. Alomairy; Luma Abdul Ghani Zghair; Hadia Kadhim J.Al-Ogili; Assifa M. Mohamad; Abbas Sheyaa Alwan; Haider L. Aneed; Assim H Yousif; Salema Sultan Salman; Abbas Hussien Miry; Abduladhem A.Ali; Mohammed Zeki Al-Faiz; Sabah N. mahmood; Khansaa Dawood Selman; Shaymaa Tareq Kadhim

Volume 29, Issue 8 , June 2011, , Page 1463-1470

https://doi.org/10.30684/ etj.29.8.2

Abstract
  For semigroups of linear bounded operators on Hilbert spaces, the problem of being in Cp , 0 Keywords  Read More ...
Behavior of Plain and High Performance Polypropylene Fiber Concrete Subjected to Elevated Temperatures
Behavior of Plain and High Performance Polypropylene Fiber Concrete Subjected to Elevated Temperatures

Luma Abdul Ghani Zghair

Volume 29, Issue 8 , June 2011, , Page 1517-1535

https://doi.org/10.30684/ etj.29.8.8

Abstract
  The aim of this work is to determine the residual compressive strength and splitting tensile strength after exposure to an elevated temperature (between100 to 500 C ◌ْ ) of plain ...  Read More ...
Mechanical Strength of Silicon Carbide Bonded with Iraqi Clays
Mechanical Strength of Silicon Carbide Bonded with Iraqi Clays

Abdul Mutalb Al Sheikh; Shihab Ahmed Zaidan Al- Juboori; Kassim S. Kassim

Volume 29, Issue 4 , March 2011, , Page 665-676

https://doi.org/10.30684/ etj.29.4.3

Abstract
  Two types of Iraqi clays (Kaolin and Bentonite) were used in bonding process with different weight percentage (5%, 10%, 15%, 20%, and 25%) and with different particle size from clays ...  Read More ...
Impact Resistance of Lightweight Chopped Worn-Out Tires Concrete
Impact Resistance of Lightweight Chopped Worn-Out Tires Concrete

Zaid M. K. Al-Azzawi; Dhafir T. F. Al-Khameesi

Volume 28, Issue 16 , August 2010, , Page 5200-5212

https://doi.org/10.30684/etj.28.16.6

Abstract
  This study summarizes results of an experimental investigation of theimpact resistance of 12 lightweight concrete slabs made from incorporating chopped worn-out tires (Ch.W.T.) into ...  Read More ...
Mechanical Properties of High-Strength Fiber Reinforced Concrete
Mechanical Properties of High-Strength Fiber Reinforced Concrete

Zaid Muhammad Kani Al-Azzawi; Kaiss Sarsam

Volume 28, Issue 12 , June 2010, , Page 2442-2453

https://doi.org/10.30684/etj.28.12.13

Abstract
  Experimental results of this work in addition to a wide range of data from previous workwere analyzed to study the mechanical properties and strength of high-strength concrete with ...  Read More ...
Using Citric Acid As An Admixture and It's Influence on Some Properties of Concrete
Using Citric Acid As An Admixture and It's Influence on Some Properties of Concrete

Wasan I. Khalil

Volume 27, Issue 1 , January 2009, , Page 32-41

https://doi.org/10.30684/etj.27.1.3

Abstract
  The objective of this investigation is to find the effectiveness of the citric acid asretarding admixture. The experimental results indicate that the optimum dosage of citricacid is ...  Read More ...