Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : physical properties

Investigating the Effect of Different Parameters on Physical Properties of Metakaolin-Based Geopolymers

Ahmed J. Abed AL-Jabar; Hanna A. Al-Kaisy; Sarmad I. Ibrahim

Engineering and Technology Journal, 2022, Volume 40, Issue 12, Pages 1690-1699
DOI: 10.30684/etj.2022.132691.1138

Recently, geopolymers have received widespread attention due to their ability to completely replace ordinary cement with better efficiency, lower cost, and less damage to the climatic environment. This paper aimed to prepare MK-based geopolymer cement at ambient temperature with different alkaline activators and processing parameters. XRD, PSA, DTA-TGA, SEM, and other techniques have characterized the prepared samples. ANOVA test was employed to identify the main effect of the processing parameters. Results showed that the incorporation of potassium ions has a negative effect on the physical properties of GP, in which the presence of such ions tends to decrease the density of GP. Furthermore, the apparent porosity and water absorption were increased. For Na and K, Na-activated GP, it was also concluded that the density of GP increases by increasing Si/Al ratios. Despite the Na-based GP processes having a larger density in compared to the K, Na-based ones. The results also suggested a strong effect of the W\MK ratio on physical properties, in which decreasing this ratio is necessary to achieve GP with better properties. The findings also revealed that a one-minute mixing period was sufficient for producing a homogeneous and dense GP paste.

Improving the Properties of Main Drainage Water by Using of Magnetic Field Technique

Olla H. Kareem; Abdul Hameed M.J. Al-Obaidy; Riyad H. Al-Anbari

Engineering and Technology Journal, 2019, Volume 37, Issue 6A, Pages 195-200
DOI: 10.30684/etj.37.6A.2

In this research, main drainage channel treated by using a magnetic field with a density of (6000 Guesses). The general drain water samples flowed through the magnetic field with three levels of treatment (5 minutes, 15 minutes and 30 minutes) depending on the contact time. After treatment, it was found that the magnetic field works to improve more than ten physical and chemical properties of water. Essentially, Magnetic treatment has had a significant effect on the high salt content found in general drain water samples as it has been reduced and converted into simpler compounds. In addition, the magnetic field has an important role in increase the percentage of dissolved oxygen in water.

Optimization Using Taguchi Method for Physical and Mechanical Properties of Bio Mimicking Polymeric Matrix Composite for Orthodontic Application

Jenan S. Kashan

Engineering and Technology Journal, 2019, Volume 37, Issue 5A, Pages 181-187
DOI: 10.30684/etj.37.5A.5

This work take in consideration the application of Taguchi optimization methodology in optimizing the parameters for processing (composition, compounding pressure) and their effects on the output physical (Density and true porosity) properties and mechanical(fracture strength and microhardness) properties for the Nano HA,Al2O3 fillers reinforced HDPE hybrid composite material for orthodontic application. An orthogonal array of the Taguchi approach was used to analyses the effect of the processing parameters on the physical and mechanical properties. On the other hand, the surface roughness and particle size distribution were also calculated to study their effect on the output properties. The result shows that the Taguchi approach can determine the best combination of processing parameters that can provide the optimal physical and mechanical conditions, which are the optimum values (the optimum composition was15HA/ 5Al2O3/80HDPE, and optimum compounding pressure was102 MPa.

Development the Physical Properties of Polymeric Blend (SR/ PMMA) by Adding various Types of Nanoparticles, Used for Maxillofacial Prosthesis Applications

Sihama I. Salih; Jawad K. Oleiwi; Hajir M. Ali

Engineering and Technology Journal, 2019, Volume 37, Issue 4A, Pages 120-127
DOI: 10.30684/etj.37.4A.2

As maxillofacial defects increased due to cancer; it became necessary to select high-quality prosthetic materials in this field. Silicone rubber is widely used in damaged maxillofacial affected areas replacement surgery as bio material. The aim of this research, prepared a nano composites materials, from polymer blend (silicone rubber: 5% PMMA) reinforced by different types of nano-powders; pomegranate Peels Powder (PPP), Seeds powder of dates Ajwa (SPDA) and TiO2 nano-powders with loading level (0.0, 0.1, 0.2, 0.3 and 0.4%). Some physical properties such as density, water absorption, and Thermo-Physical test, FTIR analysis, as well as, FTIR, antibacterial tests were done on prepared samples. The results showed that the composites material based of polymer blend with optimum percent are of 0.2% of pomegranate Peels Powder (PPP), 0.3% of Seeds powder of dates Ajwa (SPDA) and 0.1% of TiO2 nano-powders that have ideal characteristic. Also for antibacterial tests, polymeric blend composites with optimum percent of this nano-powders show that more antibacterial efficiency against S.aureus bacteria than E.coli bacteria.

Physical Properties Study on Ti-C/Nano-Ceramics Composite

Ahmed M. Al-Ghaban; Niveen J. Abdulkader; Hadeel A. Al baiaty

Engineering and Technology Journal, 2018, Volume 36, Issue 11A, Pages 1185-1188
DOI: 10.30684/etj.36.11A.8

The effect of introducing Al2O3 and CuO nano particles on the physical properties of sintered Ti-C based materials has been studied. Titanium and carbon elemental powders have been mixed with nanoparticles of Al2O3 and CuO to produce composites of Ti-C/ceramics at 1100 °C. The XRD results show that for different amount of mixed nanoparticles, TiC, TiO2, and some rest of the reacted powders are the most dominant stable phases. In terms of physical properties, the results show that the raised Al2O3 percentage leads to gradually increase in apparent density of the sintered mixture as compared with the purely prepared TiC. Moreover, porosity and water absorption decrease with increasing Al2O3 percentage. On the other side, adding CuO to the sintered mixture causes in decreasing the apparent density. Furthermore, it was observed that CuO creates much porosity and increase water absorption of the sintered mixture.

Mechanical and Physical Properties of Nano Carbon Tube with Carbon Fiber Reinforced with Polyester Resin

M. Subhi; E. S. AL-Hassani; A.B. Abdul-Hussein

Engineering and Technology Journal, 2017, Volume 35, Issue 5, Pages 465-472
DOI: 10.30684/etj.35.5A.5

In this research, study some physical and mechanical properties of polymernano composites. The polymernano composites based on unsaturated polyester resin reinforced with carbon fibers (C.F). The samples are attended by hand lay – up method. The samples constituent were polyester resin as matrix with 3% volume fraction from carbon fiber and (0.5%, 1%, 1.5%, 2 %( volume fractions of carbon nanotube. The water absorption, hardness (shore D), flexural test, impact test and toughness fracture properties are studied. Results showed that water absorption increase with addition 3% volume fraction of carbon fiber and Carbon Nanotube, the sample (polyester+3%C.F+0.5% CNTs) has lower water absorption than other samples. The hardness (shore D), flexural test, impact testand toughness fracture for the sample (polyester+3%C.F+0.5% CNTs) has higher value for Nano- composites.

Improvement the Mechanical and Physical Properties of Epoxy–Polyurethane Matrix Resin by Using Kevlar Fiber and ZnO Particles

M.R. Gharkan

Engineering and Technology Journal, 2017, Volume 35, Issue 3, Pages 261-266
DOI: 10.30684/etj.35.3A.11

This work focuses on the synthesis of hybrid polymer composite matrix materials prepared from the epoxy–Polyurethane resin (Polyprime EP) as matrix reinforced phase by using (5%, 10%, 15% and 20%) Zinc oxide particles and 5% woven roving Kevlar fiber (00-900) kind (49). Mechanical and physical tests such as tensile strength, impact strength, hardness, density, thermal conductivity, and water absorption were done. The results showed increased hardness with increasing volume fraction of ZnO for the ratios (5%, 10%, 15% and 20%). The impact strength was increased for volume fraction of zinc oxide at 15%, modulus of elasticity at 5%, thermal conductivity at 20% and density test at 10%. The stress increased at volume fraction of zinc oxide at 10% and 15%. The water absorption decreased with increasing volume fraction of ZnO additives.

Physical and Mechanical Properties Estimation of Ti/HAP Functionally Graded Material Using Artificial Neural Network

Jawad K. Oleiwi; Rana A. Anaee; Sura A. Muhsin

Engineering and Technology Journal, 2016, Volume 34, Issue 12, Pages 2174-2180
DOI: 10.30684/etj.34.12A.1

This study presents the effort in applying neural network-based system identification techniques by using Back- propagation algorithm to predict somephysical mechanical properties of functionally graded and compositesamples from Ti/HAP, these samples were fabricated by powder metallurgy method at various volume fraction of hydroxyapatite and at n equal (0.8, 1, and 1.2). Because of important of advanced materials such as FGMs as alternative industrial material, it is necessary to measure the physical properties of these materials such as porosity, density, hardness, compression …etc. Therefore the ANN will be used to estimate these properties and give a good performance to the network.

High Performance Concrete Improvement by Styrene-Butadiene Rubber Addition

Alaa Abdulhasan Atiyah; Saad B. H. Farid; Ahmed Saad Kadhim

Engineering and Technology Journal, 2016, Volume 34, Issue 12, Pages 2296-2309
DOI: 10.30684/etj.34.12A.12

In this paper, the properties of high performance concretes modified by polymer were studied. Liquid synthetic styrene-butadiene rubber (SBR) was added (5%, 10% and 15%) by weight of cement to high performance concrete (HPC) to elucidate the effect of the polymer additive to their properties.The compressive strength, splitting tensile strength, flexural strength, porosity, dry density and total water absorption were measured.Thermal conductivity, thermal diffusivity and specific heat of HPC isalso measured. In addition, SEM micrographs are compared reference and polymer modified HPC.The results show that there is an improvement in the workability for HPC after the addition of the polymer. Furthermore, the density of the set concrete was increased and both the porosity, total water absorption was decreased. Thermal conductivity, thermal diffusivity, and specific heat show improvement after polymer addition, which indicate better endurance.The SBR modified HPC, exhibits a significant improvement in splitting tensile strength and flexural strength, although it was at the expense of the compressive strength to some extent.The HPC has shown balanced microstructure before and after the addition of polymer, although they noticed improved on the ductile properties.

Fine Aggregate Ratios Effect on Mechanical and Physical Properties of Pervious Concrete

Muyasser Mohammed Jomaa; Mohammed Sabah Irhayyim

Engineering and Technology Journal, 2016, Volume 34, Issue 9, Pages 246-260
DOI: 10.30684/etj.34.9A.18

The porous concrete applications and the process of production in different ways depending on the replacement of fine or coarse aggregate components of research important topics, The study dealt with production pervious concrete by depending on normal concrete by removing fine aggregate by four percentage by weight (25%, 50%, 75%, 100%), as was the work of trail mixtures of concrete for a reference mix of were depended mixture the weight [1:1.5:3] with a ratio (W/C) is equal to (0.40), which recorded the highest compressive strength of age (7) days, by the results tests show that the increased rate of removal of fine aggregate contributed to reduce the strength and density with the increase in porosity and permeability and absorption, as less density obtained is (1756.2)kg/m3 remove the fine aggregate by (100%), which gives less strength to compressive (14.28)MPa and the highest value for porosity (24.81%), as were better strength to compressive, splitting tensile, and bending are (36.77MPa, 4.28MPa, 4.4MPa), respectively to the proportion of removing fine aggregate (25%) compared to the reference mixture.

Study the Pollutants Chlorophenols: Electronic and Physical Properties Relationship

Abdul Hameed M.J. Al Obaidy; Ahmed A. Al-Amiery; Rana R. Al-Ani; Yasameen K. Al-Majedy; Furkan Kamil

Engineering and Technology Journal, 2016, Volume 34, Issue 3, Pages 349-357
DOI: 10.30684/etj.34.3B.1

Geometrical optimization and electronic structure of chlorophenols were researched by DFT (B3LYP) utilizing a 3-21G basis set. We have likewise researched the aggregate electronic properties, Highest occupied molecular orbital (HOMO), lowest unoccupied molecular orbital (LUMO) and energy gap. The calculated HOMO and LUMO energies demonstrate that charge transfer occurs within the molecule.

Enhancing Thermal and Water Absorption Properties of Unsaturated Polyester and Epoxy by Nanocarbon Black Powder

Mohammed S. Hamza; Amer Hameed Majeed; Hayder Raheem Kareem

Engineering and Technology Journal, 2013, Volume 31, Issue 12, Pages 2311-2319
DOI: 10.30684/etj.31.12A.9

This paper covers the effect of nanocarbon black powder (N220) on the some
physical properties (thermal conductivity and water absorption) of unsaturated and
epoxy resins filled with nanocarbon black powder (N220). The polymer
nanocomposites, were prepared with (1 to 10 wt%) of carbon black nanoparticles
using ultrasonic wave bath machine dispersion method. The results had shown
thermal conductivity of unsaturated and epoxy resins improved by (131.37% and
78%) respectively, at 10wt. %. The water absorption reduction by (55.41% at 4 wt.%,
51.76% at 6 wt.%) for unsaturated polyester and epoxy nanocomposite, respectively.

Physical Properties of Cdo Thin Films Prepared by Spray Pyrolysis Technique

Douaa sulayman Jbaier

Engineering and Technology Journal, 2013, Volume 31, Issue Issue 2 B, Pages 185-193
DOI: 10.30684/etj.31.2B.6

In this paper CdO films of 3.8 μm thickness were deposited onto glass and Si-wafer substrates by spray pyrolysis technique at 250oC temperature. The structure, optical and electrical properties were investigated. The structure of the films were studied by X-ray diffraction have polycrystalline structure with (111) preferential orientation. The films have good transmittances in visible and NIRregion, with direct optical band gap (2.5eV).The electrical conductivity was measured as function of temperature and theactivation energy was about(0.155and 0.241) eV.The electrical characterization of CdO/Si hetrojunction diode was investigated by current –voltage studied.The reverse current strongly increased with illumination intensity and voltage bias.

A Study of Some Mechanical, Thermal and Physical Properties of Polymer Blend with Iraqi Kaolin Filler

Najat J. Saleh; Samir Nassaf Mustafa

Engineering and Technology Journal, 2011, Volume 29, Issue 11, Pages 2114-2131

In the present work, polymer blends were fabricated by mixing two polymers
of polypropylene and poly (methyl methacrylate) mixed in different weight
percentage and different particle size of Iraqi kaolin. The study of some
mechanical, physical and thermal conductivity properties was carried out on all
composites. The mechanical tests included (impact, hardness, modulus of
elasticity, yield strength, elongation, stress at break and compression), Lee's disc
method was used to calculate the coefficient of the thermal conductivity of
specimens before and after reinforcement with kaolin powder. The physical
properties test included absorption tests, as well as X-ray measurement. The
results have shown that after the reinforcement with different weight percent of
kaolin powder, most mechanical properties such as hardness , modulus of
elasticity and compression increase while impact and elongation decrease with
increasing in weight percentage and a decreasing in particle size. The results have
shown also that the coefficient of thermal conductivity decreases with increase
weight percentage the water gain is decreased with the increase in weight percent
and decrease in particle size of the filler. X-ray diffraction pattern of filled
samples indicates that addition of kaolin adversely affects the crystallization of
PP/PMMA blend.