Engineering and Technology Journal

Assessment of Properties of Composite Boards from Groundnut Shells and Sawdust for their suitability for Structural Applications

Ekong U. Nathaniel; Nsikak E. Ekpenyong; Casmir C. Zanders Akaolisa; Okwet J. Yawo; Grace P. Umoren; Samuel S. Akpan

Volume 42, Issue 4 , April 2024, , Page 388-397

https://doi.org/10.30684/etj.2023.144328.1628

Abstract

Groundnut shells and sawdust are generated in vast quantities yearly but under-utilized. In developing countries, this situation leads to their disposal by unplanned landfilling, indiscriminate ... Read More ...

Waste Rubber Pre-treatments and Their Effects on Compressive and Flexural Strength of Modified SIFCON

Ali M. Alibraheem; Basil S. Al-Shathr

Volume 41, Issue 11 , November 2023, , Page 1379-1389

https://doi.org/10.30684/etj.2023.141759.1511

Abstract

Slurry-infiltrated fiber concrete (SIFCON) is a comparatively new and unique steel fiber-reinforced concrete (FRC) form. SIFCON possesses many desirable characteristics, including high ... Read More ...

Experimental Study on The Effect of Aspect Ratio on Flexural Behavior of Aluminum Sandwich Composite

Ganesh Radhakrishnan; Al Haitham Al Hattali; Al Muntasser Al Yahyai; Al Muntasser Al Riyami; Al Muatasim Al Hadhrami

Volume 40, Issue 7 , July 2022, , Page 990-995

https://doi.org/10.30684/etj.2022.134317.1234

Abstract

Sandwich composites are one such kind of light-weight composites developed for structural and vehicle body buildings etc. Due to their remarkable features such as high specific strength, ... Read More ...

Mechanical Performance of Blended Fly Ash-based Geopolymer Concrete with GGBS and Metakaolin

Ali A. Ali; Tareq S. Al-Attar; Waleed A. Abbas

Volume 40, Issue 5 , May 2022, , Page 819-831

https://doi.org/10.30684/etj.2022.132647.1135

Abstract

One of the most user-friendly alternatives to ordinary concrete is geopolymer concrete(GPC), which achieves the same result. GPC is a unique substance made by activating source materials ... Read More ...

Mechanical Properties Prediction of Normal and High Strength Geopolymer Concrete

Sameh B. Tobeia; Nada S. Assi; Narjis S. Abbas

Volume 39, Issue 12 , December 2021, , Page 1781-1788

https://doi.org/10.30684/etj.v39i12.1984

Abstract

The production process of cement is the main binder material in concrete usually accompanied by carbon dioxide emission. Therefore, geopolymer concrete (GPC) an alternative binder material ... Read More ...

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 ...

A Study of Some Mechanical and Physical Properties for Palm Fiber/Polyester Composite

Samah M. Hussein

Volume 38, 3B , December 2020, , Page 104-114

https://doi.org/10.30684/etj.v38i3B.598

Abstract

This research has been done by reinforcing the matrix (unsaturated polyester) resin with natural material (date palm fiber (DPF)). The fibers were exposure to alkali treatment before ... Read More ...

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 ...

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 ...

Properties of Self-Compacting Cementitious Composite Materials Containing Cement Kiln Dust Powder

Ahmed S. Kadhim; Alaa A. Atiyah; Shakir A. Salih

Volume 38, 6A , June 2020, , Page 879-886

https://doi.org/10.30684/etj.v38i6A.592

Abstract

This paper aims to investigate the influence of utilization micro cement kiln dust as a sustainable materials additive in order to reduce the voids and micro cracks in the cementitious ... Read More ...

Influence of Recycled Fine Aggregates on Strength Properties of Reactive Powder Mortar

Doaa H. Nayyef; Shatha S. Hasan

Volume 38, 3A , March 2020, , Page 288-294

https://doi.org/10.30684/etj.v38i3A.265

Abstract

Although many researchers have done many studies on recycled aggregate concrete, information is very little about the influence of utilizing recycled aggregate in the production of ... Read More ...

Analysing Some Mechanical Properties of Cinnamon Powder Reinforced with Polymeric Materials Used in Dental Application

Ahamed M. AlGhabban; Reem A. Mohammed; Jumaah R. Mahmood

Volume 37, 3A , March 2019, , Page 96-105

https://doi.org/10.30684/etj.37.3A.4

Abstract

In the dentures industry, materials must be chosen to have good mechanical properties in order to resist the conditions that may occur in the mouth. A study was conducted to assess ... Read More ...

A Comparative Investigation on Mechanical Properties of Various Fibers Reinforced Concrete

Ahmed M. Al-Ghaban; Hussein A. Jaber; Aya A. Shaher

Volume 37, 1A , January 2019, , Page 28-36

https://doi.org/10.30684/etj.37.1A.5

Abstract

The present work presents an investigation the effect of adding various fiber materials such as (glass, nylon, and carbon) into the concrete mix for inspecting and compare the mechanical ... Read More ...

Investigation of Addition Different Fibers on the Performance of Cement Mortar

Ahmed Al-Ghaban; Hussein Jaber; Aya A. Shaher

Volume 36, 9A , September 2018, , Page 957-965

https://doi.org/10.30684/etj.36.9A.3

Abstract

This work presents an investigation of possibility incorporate of synthetic fibers (glass, nylon and carbon) at two states (short: 1cm, long: 5cm) effects on the mechanical properties ... Read More ...

Preparation and Investigation of Flexural Strength and Impact Strength for Nano Hybrid Composite Materials of the Tri- Polymeric Blend used in Structural Applications

Sihama I. Salih; Wleed B. Salih; Mustafa S. Mohammed

Volume 36, 1B , January 2018, , Page 12-24

https://doi.org/10.30684/etj.36.1B.3

Abstract

Current work is aimed to preparation the nanocomposites laminatesof low density and good durability to use in structural applications. So, in thispaper, the preparation and compare ... Read More ... Current work is aimed to preparation the nanocomposites laminatesof low density and good durability to use in structural applications. So, in thispaper, the preparation and compare of some mechanical properties of twogroups of tri-polymer blends composites consisting of ((93% unsaturatedpolyester resin (UP)+(5%PMMA) (Poly methyl methacrylate)+2%NR(Natural Rubber)) as the matrix materials. Added the reinforce materials(silica (SiO2) and zirconia (ZrO2) nanoparticles) individually, with differentvolume fraction of (0, 0.5, 1, 1.5%) to the ternary polymer blends accordingto the following formula:- [((100-X) (93%UP)+2%NR+5%PMMA): (X%SiO2or X% ZrO2)] The first group is composed of matrix material reinforced withzirconia (ZrO2) nanoparticles with average diameter of nanoparticles(56.88nm) and the second group is composed of matrix material reinforcedwith silica (SiO2) nanoparticles with average diameter of nanoparticles(24.59nm). Then used as a matrix material for the preparation of hybridlaminar composites materials, reinforcement with one and two layers ofwoven carbon fibers The research included the study of the influence ofvolume fraction of nanoparticles on some of mechanical and physicalproperties like flexural strength, flexural modulus impact strength, and impactfracture toughness, in addition to test infrared spectroscopy (FTIR) and all ofthese tests were carried out at laboratory temperature. Search results haveshown that the values of (flexural modulus and impact strength and fracturetoughness) increases with the increase of the nanoparticles ratios in polymerblend nano composite of prepared samples. While flexural strength valuedecreases with the increase in the volume fraction of nanoparticles in polymerblend nano composite. The fracture energy of the of hybrid laminarcomposites is higher than those containing only the nanoparticles powders.Morphology test by scanning electron microscope indicates that a goodadhesion or interfacial interactions between the Nano powders particles,carbon fibers and components of ternary polymer blend. Which results inhigher the carbon fibers efficiency factor, and hence higher mechanicalstrength. So, the hybrid laminar nano composites, which appear high flexuralmodulus and impact strength and fracture toughness, can be foreseen toprovide valuable contribution to high performance structural applications.

Some Properties of No-Fines Concrete Produced by Using Demolished Concrete as Recycled Coarse Aggregate

Sh. A. Salih; I.N. Gorgis; W.F. Abd

Volume 35, 7A , July 2017, , Page 741-748

https://doi.org/10.30684/etj.35.7A.10

Abstract

This paper investigate some mechanical properties of no-fines concrete produced by using demolished concrete as coarse aggregate after crushing to different sizes. Different no-fine ... Read More ...

Study the Effects of Nano-Materials Addition on Some Mechanical Properties of Cement Mortar

F.A. Rasin; L.K. Abbas; M.J. Kadhim

Volume 35, 4A , April 2017, , Page 348-355

https://doi.org/10.30684/etj.35.4A.6

Abstract

This research involves nano-materials addition and interaction with cement mortar behavior for many mortar samples under variable curing time with constant water to cement ratio (W/C ... Read More ...

Mechanical Properties of Fiberous High Performance Lightweight Aggregate Concrete

H.K. Ahmed; W.I. Khalil; M.D. Subhi

Volume 35, 3A , March 2017, , Page 229-238

https://doi.org/10.30684/etj.35.3A.7

Abstract

Structural lightweight aggregate concrete solves weight and durability problems in buildings and structures. Recent advanced in material technology have accelerated the development ... Read More ...

Effect of Al2O3 Powder on Some Mechanical and Physical Properties for Unsaturated Polyester Resin Hybrid Composites Materials Reinforced by Carbon and Glass Fibers

Reem Alaa Mohammed

Volume 34, 12A , December 2016, , Page 2371-2379

https://doi.org/10.30684/etj.34.12A.18

Abstract

This research is a study of the effect of Al2O3 powder on physical and mechanical properties of the polymer hybrid composites based on unsaturated polyester resin reinforced with carbon ... Read More ...

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 ... 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 types by 1:1, and a mixture composed from substitution of 10% from the previous type by natural sand. Theuseofthese wastes has rolein getting rid oftheir hugequantitieswhich constitute a fundamentalenvironmental problembecause of the difficulty of itsdegradation.Four, cement to aggregate ratios have been used. They are1:0.5, 1:0.7, 1:1, and 1:1.2 for each aggregate type mentioned above, with changing w/c ratio and superplasticizer content to have a constant flow of about 23%. Also, the effect of curing samples by different methods, including continuous submerge in water, autoclave curing for 3 hours, and carbonation curing by 50% and 100% CO2 at 75oC for 90 minutes, was studied.The results indicated that it is possible to produce lightweight cement mortar, using any type of aggregates mentioned above, with compressive strength satisfying the requirements of clay brick class C of Iraqi Standard, that used in partitions, for a mix proportion of 1:1, except when using chopped rubber tires that need using mix proportion of 1:0.5 to satisfy the strength requirements, where the use of this aggregate type needs higher w/c ratio and superplasticizer content to get the required flow, which leads to lower strength in comparison with the other types. As for chopped plastic aggregate, although it needs lower water and superplasticizer content to get the required flow and strength, care should be taken to balance betweenthe amount of waterand superplasticizer addedto avoidthe possibility of segregation in it. So it was found that using the mixture of chopped plastic and rubber aggregate give the best properties.Results also indicated that using all aggregate typeswith cement: aggregate mix proportion 1:1 satisfy the flexural strength requirements of American Standards for cellulosic fiber insulating boards, and were with thermal conductivity valueslower than that for brick and concrete having density lower than 2000 kg/m3. The results indicated that partial replacement of 10% mixed waste aggregates by normal sand cause increase in strength but in the same time increase density and thermal conductivity for the produced mortar.Results also indicated that curing by autoclave or curing with 50% or 100% CO2 cause increase in the 7 days strength compared with those cured by water but they show almost the same strength at 28 days age.

Effect of Micro Powder on Mechanical and Physical Properties of Glass Fiber Reinforced Epoxy Composite

Aseel Basim Abdul-Hussein; Fadhel Abbas Hashim; Tamara Raad Kadhim

Volume 34, 7A , July 2016, , Page 1402-1414

https://doi.org/10.30684/etj.34.7A.12

Abstract

In the present study, composites were prepared by Hand lay-up molding. The composites constituents were epoxy resin as the matrix, 3% volume fractions of Glass Fibers (G.F) as re enforcement ... Read More ...

Strength Evaluation of CO2-Cured Cellulose Date Palm Fiber Reinforced Cementitious Boards

Maan Salman Hassan; Shakir Ahmed Salih; Isam Mohamad Ali

Volume 34, 6A , June 2016, , Page 1029-1046

https://doi.org/10.30684/etj.34.6A.1

Abstract

In recent years there has been an increasing demand to recycle wastes produced by the agricultural and industrial processing. The aim of this paper is to investigate the suitability ... Read More ...

Manufacturing of Sustainable Cellulose Date Palm Fiber Reinforced Cementitious Boards in Iraq

Riyad H. Alanbari; Maan S. Hassan; Ali H. Fakhri

Volume 33, 7A , July 2015, , Page 1680-1696

https://doi.org/10.30684/etj.33.7A.10

Abstract

The present work investigates the suitability of utilizing date palm residues in manufacturing wood-based cementitious boards. It also concerns other environment issues like trying ... Read More ...

Effect of Nature Materials Powders on Mechanical and Physical Properties of Glass Fiber / Epoxy Composite

Aseel Basim Abdul-Hussein; Emad Saadi AL-Hassani; Reem Alaa Mohammed

Volume 33, 1A , January 2015, , Page 175-197

https://doi.org/10.30684/etj.33.1A.14

Abstract

In the present study composites were prepared by Hand lay-up molding. The composites constituents were epoxy resin as the matrix, 6% volume fractions of Glass Fibers (G.F) as reinforcement ... Read More ...

Numerically and Experimentally Studying of some Mechanical Properties of the Polyester Matrix Composite Material Reinforced by Jute Fibers

Jawad Kadhim Oleiwi; Mohamad K. Alwan; Qahtan Adnan Hamad

Volume 32, Issue 9 , September 2014, , Page 2235-2247

https://doi.org/10.30684/etj.32.9A11

Abstract

This research focuses on the preparation of polymer matrix composite material by (hand lay – up) method, where the material (rectangular beam) was prepared from unsaturated polyester ... Read More ...

Keywords = Flexural strength

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