Category: Uncategorized

Flexural Behavior of Repaired Reinforced Concrete Slabs with Different Typed of Concrete

Muthanna Journal of Engineering and Technology

Volume (4), Issue (1), Year (30 June 2016), Pages (57-67)

DOI:10.52113/3/eng/mjet/2016-04-01/57-67

Research Article By:

Mazen D.Abdulah

Corresponding author E-mail: mazend081@gmail.com

ABSTRACT

Experimental study of the flexural behavior of repaired reinforced concrete two way slabs with epoxy injection study in this paper. Eleven simply supported reinforced concrete slabs are used, five of which are made with (NSC), four with (HSC) and two with (LWC). The slabs is repair by used epoxy injection method. The aim of repair method is to increase or at last restore flexural strength of these slabs and to monitor their post-repair load-deflection behavior. Investigate the behavior of reinforced concrete two way slabs with different concrete compressive strength before and after repaired with epoxy injection is studied. Also, the efficiency of repaired after loading to the different level between (100%-66%) of the ultimate load obtained for control slab is investigated. The experimental results of repaired two way slabs indicate that; the repair method used is successful to restore or increase the capacity of slabs; the lower-strength slabs is higher increase in capacity compered with other slabs; after retesting the crack repaired do not reopen, instead, new nearby cracks are developed. In repaired slabs the the structural behavior is similar to that of original slabs, however, a lower stiffness and greater ductility are observed.

Keywords: LWC, light weight concrete, NWC, normal strength concrete, HSC, high strength concrete, w/c water to cement ratio.

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Using of Stones in Building the Foundations

Muthanna Journal of Engineering and Technology

Volume (4), Issue (1), Year (30 June 2016), Pages (51-56)

DOI:10.52113/3/eng/mjet/2016-04-01/51-56

Research Article By:

Hussein Yousif Aziz

Corresponding author E-mail: husseinyousif3@hotmail.com

ABSTRACT

The problem of this study is that the building of foundation by stones at the present time leads to develop cracks in the superstructure. Therefore, the solutions and the right manner were suggested for building the stone in the small and big structures. This paper studies using and properties of stones in building of foundations, that the stone is rigid and stiff in the same time very cheap for building, especially in the regions wealthy with stone. The models were taken for analyzing, firstly experimentally in the field site and secondly by Plaxis Program using the Finite Elements with the same properties of the soil and calculate the vertical displacement, vertical strain, factor of safety and bearing capacity. It can be concluded that the using of the reinforced columns in the small foundation in addition to the beam and stones will reduce the vertical displacement and strain to lower values, maintain high value of bearing capacity and increase the factor of safety that makes the structure becomes safer. Also for the big structures like bridges another models were used with higher loadings and the same above parameters were calculated, the stone with special requirements approved to improve and treat the soil parameters even for the big structures.

Keywords: Rock mechanics, foundation engineering, bearing capacity, Plaxis program.

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Effect of change in particle size of the powder coating (Ni- Al) thermally sprayed by flame on the mechanical properties of the coating layer

Muthanna Journal of Engineering and Technology

Volume (4), Issue (1), Year (30 June 2016), Pages (43-50)

DOI:10.52113/3/eng/mjet/2016-04-01/43-50

Research Article By:

عمار رزاق حسن

Corresponding author E-mail: ammarr.alshemary@uokufa.edu.iq

ABSTRACT

In this research was conducted thermal coating process to follow flame spray technology through the use of gaseous mixture consisting of oxygen and acetylene for the purpose of obtaining the surface layer of nickel plating – Aluminum (metco450) on the surface of medium carbon steel type (AISI 1050). Provide an increase in the mechanical properties of the surface of the metal guide and compensate for the missing parts of the surface as a result of the process of wear and tear. Was conducted in three successive phases, first phase involved the preparation of models and to create the basis for this surface models as well as the preparation of powder coating and analyze the chemical components of the models and powder coating. While the second phase involved the implementation of the coating process (nickel – aluminum) using a flame spray coating process was carried out in different ways for each model through a change in the granular size of the powder coating. The third phase of the research included the testing of standard tests check adhesion, examination of roughness, check the wear and tear and check the hardness of the coating as well as microscopic examination of the paint and the surface layer basis. Where results showed that increasing the size particleboard from (25μm) to (75μm) led to increased wear rate and a decrease in adhesion coating layer, as noted increased roughness layer coatings increase size particleboard for powder coating, also led to increase size particleboard for powder coating to a decrease in hardness layer paint.

Keywords: Flame spraying, coating nickel aluminum, medium carbon steel, particle size.

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Stress-Strain Behavior and Mechanical Properties of Silica Fume Lightweight Polymer Concrete

Muthanna Journal of Engineering and Technology

Volume (4), Issue (1), Year (30 June 2016), Pages (37-42)

DOI:10.52113/3/eng/mjet/2016-04-01/37-42

Research Article By:

Muslim A. k. Al-Kannoon

Corresponding author E-mail: moslemphd@gmail.com

ABSTRACT

This investigation aims to improve the stress-strain behavior and mechanical properties of lightweight concrete in order to use it in structural members. Special type of lightweight concrete was produced in this study prepared by mixing Ordinary Portland Cement (OPC type I) and white gravel of low specific gravity, sand with very low percentage of 10% from gravel weight, and w/c ranged from 0.42 to 0.46, silica fume added as percentage from cement weight and STYRENE BUTADIENE RUBBER (SBR) was added also in different percentages (5%, 10% and 15%). The main mixes 1:5 (cement: gravel) and 1:4 were used in this study. The tests in this research include stress- strain tests for both ascending and descending portions, compressive strength test, tensile strength test, flexural strength test and density of specimens. The most significance effect done by adding 15% SBR resin and gives (110%) increment in compressive strength for 1:4 mixes and (142 %) increment for1:5 mixes. For mixes 1:5 and by adding 15% SBR, the tensile strength increased 100%, flexural strength increased also 62% and density of specimens increased 8.2% , but more significant effect is seen for mixes 1:4, the increased in tensile and flexural strength and density of specimens were 138%, 109% and 7.71% respectively. The values of modulus of elasticity increased also compared with reference mixes and have excellent values ,by adding 15%SBR the increment was (58 %) for 1:4 mixes, and (150 %) increment for 1:5 mixes, that increments are very important to reduce the deflection in concrete members such as slabs and beams, therefore, like this polymer concrete can be used as structural members.

Keywords: Stress-strain behavior, compressive strength, flexural strength, modulus of elasticity, lightweight concrete, polymer concrete, SBR.

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The Adjacent Conceptions Effect on Creativity According to Detailed Path for Creation Process

Muthanna Journal of Engineering and Technology

Volume (4), Issue (1), Year (30 June 2016), Pages (23-36)

DOI:10.52113/3/eng/mjet/2016-04-01/23-36

Research Article By:

Basim Hasan Al-Majedi and Ahmed Hashim H. El-Eqapy

Corresponding author E-mail: Dr.basim_arch@yahoo.com

ABSTRACT

The Contemporary narratives focused on the study of the architectural design process of general framework of an understanding of the important elements of the path of the process and ended to focus on the concept of innovation as a concept overarching all the bases underlying innovation in the process illustrates the design in architecture, hence the need arose to study the impact of the rest of the concepts adjacent it to strengthen and assigning creative path in general and its role in influencing the detailed stages of cost in particular. This paper goals are of defining general principles of the conceptions creativity and the importance of theory in architecture and classification stages of cost in addition to the display of vocabulary and concepts important adjacent and influential in the course design and productive to know the research problem is not so obvious effect of (check) concepts Utility (adjacent) in track design creative in Architecture the aim is to clarify the above and down to form a theoretical framework is Knowledge clear indications of what has been applied to the product of an architect specializing in order to explore the impact of these indicators achieved the objective of the research and then head to put the final conclusions and recommendations.

Keywords: Creative, consciousness, cognition, perceptual, thought.

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Hydraulic Model Development using HEC-RAS and Determination of Manning Roughness Value for Shatt Al-Rumaith

Muthanna Journal of Engineering and Technology

Volume (4), Issue (1), Year (30 June 2016), Pages (09-13)

DOI:10.52113/3/eng/mjet/2016-04-01/09-13

Research Article By:

Ameera Mohamad Awad

Corresponding author E-mail: ameer.wisam2005@gmail.com

ABSTRACT

Selection of appropriate Manning’s coefficient is critical to the accuracy of computed water surface profiles. Moreover, estimation of channel roughness parameter is of key importance in the study of open- channel flow particularly in hydraulic modeling. Hence, it is essential to calibrate the channel roughness coefficient for open channel whether natural or artificial. In the present study, it is attempted to calibrate the value of Mannnig’s “n” coefficient by comparing the computed water surface profiles with observed one, using HEC-RAS steady flow model for shatt al-Rumaith channel in Al-Muthanna (Iraq). For this calibration, the flows for the year 2014 has been considered. It is found that the value of Manning’s roughness coefficient for shatt al-Rumaith shows a good agreement between the computed with observed water surface profiles, is n=0.023 and n= 0.04 for main channel and floodplain respectively.

Keywords: Manning’s roughness coefficient, HEC-RAS model, calibration, water surface profiles, shatt Al-Rumaith.

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Investigation of Noise Levels Within Al-Muthanna University in Al-Muthanna Province Iraq

Muthanna Journal of Engineering and Technology

Volume (4), Issue (1), Year (30 June 2016), Pages (01-08)

DOI:10.52113/3/eng/mjet/2016-04-01/01-08

Research Article By:

Huda Mohammed Selman

Corresponding author E-mail: hudamohammad20@gmail.com

ABSTRACT

Noise pollution around the Al-Muthanna university in Al-Samawah city was measured to study the effects on the teaching-learning processes and performance of both teachers and students during November and December 2014. Digital Sound Level Meter (model a GM1351 ) was used to measure the noise level, In twelve selected buildings for the study as indoor sites and the park and main door of the university as outdoor sites . The measurements at the buildings were carried out in three different time intervals of the day i.e. in the morning 8:00-10:00am, 10:00-12:00 pm and 12:00-2:00 pm. Noise intensity was also measured in two points at an interval of half hour. After recording of daily measurements of noise level, the hourly average noise level for each point of the building and for the whole buildings were calculated. As well as the total average of noise levels was calculated in order to compare it with the allowable limits of EPA for educational institutions. The maximum noise level was found in college of education (81.8) dBl and the minimum value in college of nursing which was equal(73.3) dBl. The study results show that the rate of noise level in an indoor and outdoor sites is very high and not suitable for teaching-learning processes. Therefore Acts and regulations concerning noise pollution should be strictly adopted.

Keywords: Noise pollution, noise level meter, university campus.

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Investigation the Microstractural and Mechanism for the Friction Stir Welding of 7075 Aluminum Zinc Alloy

Muthanna Journal of Engineering and Technology

Volume (4), Issue (2), Year (30 December 2016), Pages (104-114)

DOI:10.52113/3/eng/mjet/2016-04-02/104-114

Research Article By:

عبدالله عذيب مشاري

Corresponding author E-mail: abdmshari_1957@yahoo.com

ABSTRACT

The work aims to study the joining process of to pices Aluminum alloy 7075 with each other using filler metal of copper or ( Tin + Lead ) by means of friction stir welding. A group of specimens were joined by friction stir welding method without metallic filling and using different velocities and different welding tool. Another specimen were taken with the same previous conditions but using metallic filler of copper or ( Tin + lead ) ( the filling metal used in Soldering) . It was evident the interference of this filler with the base metal (7075) with the assurance of granular growth in the region of interference, while when using the filler of copper type, no interference exist but the copper was found separated in the form of tapes around the region of its interference with the base metal. It was also found that the higher rotational speed will result in higher refragement in copper.

Keywords: Filler metal, friction stir welding, fusion zone, advanced side, retread side.

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Effect of Silica Fume and Polypropylene Fibers on the Mechanical Properties of Pervious Concrete

Muthanna Journal of Engineering and Technology

Volume (4), Issue (2), Year (30 December 2016), Pages (95-103)

DOI:10.52113/3/eng/mjet/2016-04-02/95-103

Research Article By:

Haider Araby Ibrahim

Corresponding author E-mail: arabyhaider@yahoo.com

ABSTRACT

In this paper, Silica Fume (S.F.) be used for reinforce pozzolanic cement paste and the effect of using many weight percentages as (0%, 5%, 10%, 15%, and 20%) to lessening the concrete weight as a cement replacement in concrete mixtures on the mechanical properties was studied. High range water reducing added to decrease the water demand of the concrete, when silica fume added. Moreover, (0.025%, 0.05%, 0.1%, and 0.15%) are the proportions of polypropylene Fibers (P.P.F.) by volume, which used to improve the pervious concrete mechanical properties, physical, and mechanical properties of hardened concrete containing voids ratio, compression strength, and flexural strength and, splitting tensile strength investigated. The density of reference pervious concrete that was get through the experimental work was (1835 Kg/m3) at (28) days ,it permeability coefficient (K) and voids content was (0.324) cm/s, and (30.21%) successively, The results shown important increase in compression, splitting tensile and flexural strengths of pervious concrete containing silica fume and (P.P.F.) comparison with reference pervious concrete. The mixture of (10%) of (SF) and (0.1%) of (P.P.F.) gave optimum increased in the compressive, flexural, and splitting tensile strengths compared with the reference mix and the results (47.8%, 29.21%, and 24.41%) respectively.

Keywords: Pervious concrete, polypropylene fibers, silica fume, compressive strength, permeability coefficient, voids content.

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Study the Effect of Date Seed Powder on the Strength of Kaolinite Clay Soil

Muthanna Journal of Engineering and Technology

Volume (4), Issue (2), Year (30 December 2016), Pages (88-94)

DOI:10.52113/3/eng/mjet/2016-04-02/88-94

Research Article By:

Yahya k. Atemimi and Khitam Abdulhussein Saeed

Corresponding author E-mail: eng.yahya.kadum@uobabylon.edu.iq

ABSTRACT

The Kaolinite soil is considered as a problematic soil due to its low strength with high water content, low density and low permeability. So, there are attempts to improve the engineering properties of this type of soil by mixing it with different additives. In this study the Date seeds powder was used in two forms, first: as a powder (DSP) and mixed with the Kaolin soil at different percentages by weight (3%, 5%, 7% and 10%), and second, the powder was burned at 450OC for 4 hours in furnace (DSPB) then mixed with Kaolin soil at different percentages by weight (3%, 5%, 7%, and 10%). The results show an increase of 755% in the strength of the Kaolinite soils at 5% DSPB as compared to the origin strength when testing in unconfined compressive strength test UCS. Also, the results show a decrease in plasticity index for all mixture percentages in DSPB by 26.2% using 10%DSPB. Curing time results show high percent of increase in strength from 170 to 310 kN/m2 for 0 to 28 days respectively, this increase equal to 1386% from strength of reference soil.

Keywords: Soil improvement, kaolinite clay, UCS, date seed powder, curing time.

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The Role of Features Reducing Anxiety in Interior Spaces Public Waiting Spaces in Healthcare Buildings as a Case Study

Muthanna Journal of Engineering and Technology

Volume (4), Issue (2), Year (30 December 2016), Pages (66-74)

DOI:10.52113/3/eng/mjet/2016-04-02/66-74

Research Article By:

شمائل محمد وجيه الدباغ

Corresponding author E-mail: shamael.dabbagh@gmail.com

ABSTRACT

This research examines the physical helth care environments and explores how to utilize (indoor water features) for regenerating people spirit. Although much research supports the idea that natural elements may help alleviate stress and anxiety, but bringing nature into the public interior spaces is problematic. There is a lack of research about the relationship between the helth care physical spaces, stress, and indoor water features. This study investigates how to utilize (indoor water features) in the helth care public spaces that may help reduce stress potential. The absence of a comprehensive theoretical framework for the role of water feature as an effective restorative element that may reduce stress by providing a pleasant affect, and exploring its implicit psychological aspects constitutes the main research problem. In view of the problem under investigation, the goal of the present research is defined to arrive at the identifying of the main strategies to reduce stress potential by using indoor water features in the public helth care spaces. Arriving at the aforementioned aim requires building a theoretical framework, and then the application of the framework to selected interior helth care spaces images (with various water features) in order to test the validity of the hypothesis. Finally research findings, a set of recommendations are put forward.

Keywords: Water features, anxiety and stress, public waiting spaces, health care buildings.

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Characterizations Particulates of Crushed Particles (Al_Zn_Mg_Cu_Ni) for Fabrication of Surface Composites Al-Alloy Using Friction Stir Processing Route

Muthanna Journal of Engineering and Technology

Volume (4), Issue (2), Year (30 December 2016), Pages (56-65)

DOI:10.52113/3/eng/mjet/2016-04-02/56-65

Research Article By:

Haider Tawfiq Naeem

Corresponding author E-mail: dr.haider.ta@mu.edu.iq

ABSTRACT

Productions of surfaces composites have high mechanical properties and altered microstructural is attracting considerable attention. One of the methods of fabricating composite surfaces of aluminium matrix alloys are the procedure of Friction Stir Process (FSP). In this investigation, the producing for the surface composites of Aluminum_Zinc_Magnesium_Copper alloy (7000 series) with the pulverizing particulates of (Al_5wt%Zn_2.5wt%Mg_1.5wt%Cu_4wt%, 6%, 8% Ni), as the reinforcement particles using FSP was discussed. The reinforcements were from Al_Zn_Mg_Cu particulates as well various nickel powder (mass percentages) synthesized using the high-energy, ball milling alloying process. Composites samples underwent for the homogenizing treatment through various temperatures. These samples have subjected the ageing treat with 120 °C for one day. Results showed a 70% decrease in the grain sizes of the surface of composites Al-alloys compared with as-received Al-alloy. The grain refinement and uniform dispersion of the reinforcements during the Al-matrix were obtained because of the optimized parameters of FSP. The intensity of precipitations intermetallic, which as reinforcements increased after heat treatments along with the phases of the precipitates. The effects of the grain reduction and intercompounds with the precipitation phases led to a valuable rise in the hardness property of surface of aluminium 7000 alloy reinforced composities.

Keywords: Strengthening intermetallic, mechanical alloying, FSP.

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Urban planning in the face of climate change impacts

Muthanna Journal of Engineering and Technology

Volume (4), Issue (2), Year (30 December 2016), Pages (46-55)

DOI:10.52113/3/eng/mjet/2016-04-02/46-55

Research Article By:

علي عبد السميع حميد

Corresponding author E-mail: ali84_baghdad@uobaghdad.edu.iq

ABSTRACT

Constitute the climatic changes the world is facing a significant challenge, because of his global warming implications of affected various areas and humanitarian dimensions, and that the problem of misuse of natural resources and the degradation of the environment has become a clear impact on the weakening economic development .
Many specialized studies such as the ” Stern Report ” has contributed for the negative effects of global warming on the economy and development, the report of the Intergovernmental Panel for Climate Change in raising awareness of the seriousness of the challenge facing the economy in the world and the human community. This study aims to examine the reality of effects of which could be left behind climate change on resources and the various sectors in the world in general and demonstrate its impact on sustainable development, and the extent of awareness of the state, institutions and individuals risks and alternatives to achieve the desired sustainable development. and try to view the most important efforts by States to counter the effects of climate change, as well as demonstrate the feasibility of achieving sustainable economic and social development in the presence of factor climate change.

Keywords: Climate change, urban planning, urban management, governance climate, adaptation and mitigation.

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The role of technology in contemporary architectural composition

Muthanna Journal of Engineering and Technology

Volume (4), Issue (2), Year (30 December 2016), Pages (32-45)

DOI:10.52113/3/eng/mjet/2016-04-02/32-45

Research Article By:

أسماء محمد حسين المُقرم و لهيب علي عبد الحسين الصائغ

Corresponding author E-mail: shamael.dabbagh@gmail.com

ABSTRACT

Architecture tried since ancient times to deal with the elements of its age, where cultural production across about multiple levels of technological act, that which shifted from craft means for changing images formalism to the will of the verification at the current time, and thus is considered technology as a measure of evolution for everything gets reality in mental and public understand , also represented a source of evolution and a sign marked of the times because of the different representation of reality architectural and cultural. This led the research to the study of (technological role in the formation of contemporary architecture) as a research problem, where technology has provided new roles beyond the classical nature, this effect on the nature of the approved type for architectural contemporary production, therefore research indicated to the concepts that related to technology that showed a difference of technological performance by studying the changing relationship between thought and industry, commitment and borders, public and customization, innovation and convenience, simplicity and complexity, has also been studying the technology phenomena for its role as a “thing, knowledge, process, product ” with surrounding the different impact for levels of expression that based on the stereotypical nature, to order that the research seeks to discuss about the results of the application conceptual framework for knowledge provided to two contemporary projects in order to clarify the impact of technology in violation of the traditional nature of the practice of architecture first.

Keywords: Role of technology, typology, technology phenomena, levels of expression, contemporary composition.

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Effect of Nitrate Recycle Ratio on the Performance of Combined Cylindrical AnoxicAerobic Moving Bed Biofilm Reactor for Domestic Wastewater Treatment

Muthanna Journal of Engineering and Technology

Volume (4), Issue (2), Year (30 December 2016), Pages (23-31)

DOI:10.52113/3/eng/mjet/2016-04-02/23-31

Research Article By:

Wisam S. Al-Rekabi

Corresponding author E-mail: wesam752014@gmail.com

ABSTRACT

Continuous up-flow moving bed biofilm reactor (MBBR) were used to treat 4m3/d of domestic wastewater in Chongqing city at Southwest China .Both the anoxic and aerobic reactors were filled to 50 %( v/v) with Kaldnes (K1) biofilm carriers. After developing the biofilm on the carriers, the effect of nitrate recycle ratio on biological nutrients removal from domestic wastewater was investigated by operation of reactors under 3 different nitrate recycle ratios ranging from 50% to 150% (50%, 100%, and 150%) through changing the value of this parameter every one week. During this operation mode, the MBBRs was operated under the optimal value of gas/water ratio which equal to 7/1 and hydraulic retention time (HRT) equal to 6.2 hours. The experiment results showed that optimum value of the nitrate recycle ratio for simultaneous organic carbon and nutrients removal was equal to 100%. In this nitrate recycle ratio, the average removal efficiencies were 92.16 %, 98.84 %,71.23 % and 91 % for COD, NH4 +-N,TN and TP respectively, while the average dissolved oxygen concentration (DO) in aerobic and anoxic MBBRs were 4.35 mg./L and 0.19 mg./L respectively.

Keywords: Ammonium nitrogen, autotrophic, carrier, heterotrophic, nitrate, nitrite, nitrogen, moving Bed biofilm reactor, phosphorus.

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Application of a Hydrodynamic HEC-RAS Model For Shatt Al-Arab River

Muthanna Journal of Engineering and Technology

Volume (4), Issue (2), Year (30 December 2016), Pages (11-22)

DOI:10.52113/3/eng/mjet/2016-04-02/11-22

Research Article By:

Abdul Hussain Abdul Kareem Abbas

Corresponding author E-mail: abdhus71@yahoo.com

ABSTRACT

Shatt Al-Arab river suffer from high values of Total Dissolved Solid (TDS), these come from two sources the first is from Euphrates river and the second is from Arabian Gulf. Therefore, In this paper one dimension and unsteady case was applied to study hydrodynamic and TDS simulation of the river water by using HEC-RAS in Shatt Al-Arab river and associated rivers was done. HEC-RAS model is produced by US Army for analyzing river system. This model could simulate steady and unsteady open channel flow. The data of discharge, stage and TDS was taken daily for the year of 2014 at different sections along Shatt Al-Arab river and Tigris-Euphrates confluence. Some of these gauges was taken as boundary conditions and the others was taken for verification of the model. Calibration and verification of the Model using these data were done. Model results were compared with the observed data in these real rivers. The result show that a very good agreement between observed and simulated data with minimum correlation (R) was equal to 0.825.

Keywords: Shatt Al-Arab river, HEC-RAS, simulation, TDS, unsteady flow.

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Shear Behavior of Slender Ferro cement Box Beams

Muthanna Journal of Engineering and Technology

Volume (4), Issue (2), Year (30 December 2016), Pages (01-10)

DOI:10.52113/3/eng/mjet/2016-04-02/01-10

Research Article By:

Aqeel H. Chkheiwer, Mazin A. Al-Mazini and Mustafa Sh. Zewair

Corresponding author E-mail: aqeelcivil@yahoo.com

ABSTRACT

This study investigated (experimentally and analytically) the influence of mortar compressive strength (37.4, 48.3 and 60.1 MPa) and the number of wire mish layer in web and bottom flange on the shear behavior of ferrocement slender box beams. To achieve these targets, 12 ferrocement box beams with shear span to effective depth ratio(a/d) of 2.8 (slender beams) are equipped, tested and assessed, all beams having cross section of 300175 mm, length of 2000 mm and hollow core of 180115 mm. The tested beams were divided into four groups, each group consists of three beams depending on compressive strength value, the first group was without wire mish, the second group was with one layer of wire mish in web and bottom flange, the third group was two layers of wire mish in web and one in bottom flange and the fourth group was with two layers of wire mish in web and bottom flange. As well as ANSYS-11 program was used to analyze these beams by nonlinear finite element method. Test results showed that, the first cracking and ultimate loads increases as the wire mish layers in web and bottom flange increases, the deflection of the tested beams decreases with increasing mortar compressive strength and wire mish layers in web and bottom flange, the finite element model gives good agreement with the experimental results within 9%.

Keywords: Box beam, ferrocement, shear behavior.

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Artificial Neural Network Model for Predicting the Compressive Strength of Concrete using Ultrasonic Pulse Velocity

Muthanna Journal of Engineering and Technology

Volume (5), Issue (1), Year (30 April 2017), Pages (72-79)

DOI:10.52113/3/eng/mjet/2017-05-01/72-79

Research Article By:

Salim T. Yousif, Omar M. Abdul-Kareem and Kaythar A. Ibrahim

Corresponding author E-mail: kaythar6871@gmail.com

ABSTRACT

This paper presents the results of study conducted with artificial neural networks (ANN) to determine the effects of the variations of concrete constituents on ultrasonic pulse velocity (UPV) and developed mathematical model to predict the compressive strength of concrete. The proposed input parameters are major factors that affect (UPV), such as cement content, water–cement ratio (W/C), the aggregate–cement ratio (A/C), maximum aggregate size, and age of concrete. The output parameter is the (UPV). The results show that (UPV) increased with the increase in concrete age. Increasing the cement content caused a rapid pulse in velocity readings, and (UPV) increased with the increase in maximum aggregate size. Aside from these factors, (W/C) negatively affected pulse velocity. Also, the ANN model was built to predict the compressive strength of the concrete using pulse velocity and the age of concrete. The results showing good rapprochement between experimental value of compressive strength with predicated value of compressive strength.

Keywords: Concrete constituents, ultrasonic pulse velocity, artificial neural networks, concrete compressive strength.

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The Adjacent Conceptions Effect on Creativity According to Detailed Path for Creation Process

Muthanna Journal of Engineering and Technology

Volume (5), Issue (1), Year (30 April 2017), Pages (51-62)

DOI:10.52113/3/eng/mjet/2017-05-01/51-62

Research Article By:

عبدالله سعدون، أحمد عبد العالي كبة و هديل سعد رزوقي

Corresponding author E-mail: ahmed.architect@yahoo.com

ABSTRACT

The Place as a cosmic reality perceived by humans during his daily life unlimited in being visually static aware which filled the thinkers and philosophers ,And despite of the predominance of stillness and strap on the place where those in ancient times but that art in General and particular narrative grant place is clear and effective especially in our present time ,There are a lot of terms which approach to the place some related on mention the word ( place ) as equivalent attached or containment or similar approach and some other are including: extension, environment, space, emptiness, position and others of which referred to by specialists. Thus the research problem (lack of cognitive framework for spatial systems role in shaping the architecture) therefore the research aims to create a knowledge base for spatial systems role in shaping the architecture. Because there is an important role search is supposed to place systems outside the field of architecture and the potential impact on the field of architecture, and that there is an effect of the event in the system and its relationship with the place. So the search will focus on studying the concept of place within the field of (Quran – language – geographic literature. meeting – philosophy – engineering) and their relationship to the formal configuration of architecture systems.

Keywords: Place, adjacent conceptions, creativity.

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Effect of Operating Parameters on Colour and COD Removal Treatment of Textile Wastewater

Muthanna Journal of Engineering and Technology

Volume (5), Issue (1), Year (30 April 2017), Pages (63-71)

DOI:10.52113/3/eng/mjet/2017-05-01/63-71

Research Article By:

Ahmed Hassan Ali

Corresponding author E-mail: dr.ahmedha@gmail.com

ABSTRACT

In the present study, the effect of process parameters on photocatalytic degradation Bismarck brown Y dye has been examined in a batch reactor under UV light in heterogeneous slurry utilizing various concentrations of different semiconductors commercial catalysts (TiO2 , ZnO , CdS and ZnS). Parameters has been studied (catalyst type, catalyst concentration , pH of dye solution and dye concentration at the beginning). The results show that the best values of TiO2 , ZnO , CdS and ZnS are 1 , 0.5 , 1.25 , 1 g/l respectively and the optimum pH are (10 , 6 , 8 and 10) using TiO2 , ZnO , CdS and ZnS respectively. Moreover the comparative assessment of the photocatalytic efficiency was made for different photocatalytic powder. It was noticed that the best photocatalytic efficiency as ZnO > TiO2 > ZnS > CdS respectively. The percentage removal of chemical oxygen demand (COD) of the dye solutions was higher than that of the degradation of dye for the same conditions of catalyst.

Keywords: Photocatalytic, wastewater treatment, advantage oxidation.

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