Mansoura University, Faculty of EngineeringMEJ- Mansoura Engineering Journal1110-092340620201201Fouling Control and Waste Management of Membrane Based on Water Purification and Desalination.11210476310.21608/bfemu.2020.104763ENM. G.MousaMechanical Power Engineering dept. Faculty of Engineering Mansoura University, Mansoura, EgyptHishamEl-EtribyPWE Engineering dept. Faculty of Engineering Mansoura University, Mansoura, EgyptKamalElnahasPWE Engineering dept. Faculty of Engineering Mansoura University, Mansoura, EgyptJournal Article20150708<strong>In this study the membrane performance of reverse osmosis (RO) elements along longitudinal direction in a pilot-scale plant with two CSM-2540 RO elements during municipal tap water treatment at the constant recovery and flux is investigated. The continuous cleaning process is carried out with fresh water cleaning. The membrane performance is monitored by the system and element pressure drop and the rejection. During add Tio<sub>2</sub> (nano particles) in feed water with different concentration, with combined between different period for back wash and monitored the performance RO membrane. Moreover, the performance of fouled membranes is restored by using the conventional cleaning protocol. Soluble particles can enter the membrane pores and then build up on the pore wall, leading to a reduction in the total section area of the membrane pore, causing pore plugging into the membrane and increasing the membrane resistance. Membrane fouling is strongly influenced by solutions characteristics, operating conditions and membrane characteristics. The pumping power increases with increasing the fouling in membrane. The TDS also increase with increasing the fouling, . A simple unit can be used for fast fouling processes using the nanofluid concentration as TIO2. in feed flow during the backwash process. The nanofluid and washing time use the main role played in increases in RO system production. The SAW shape is the shape of the processes for all experiment. The maximum save in productivity is about 8.0% when using the washing time is 20 min.</strong>Mansoura University, Faculty of EngineeringMEJ- Mansoura Engineering Journal1110-092340620151201Evaluating Membrane Technology for Drinking Water Production in Comparison with Conventional Processes.132410476810.21608/bfemu.2020.104768ENM. G.MousaMechanical Power Engineering dept. Faculty of Engineering Mansoura University, Mansoura, EgyptHisham K.El-EtribyPWE Engineering dept. Faculty of Engineering Mansoura University, Mansoura, EgyptKamalElnahasPWE Engineering dept. Faculty of Engineering Mansoura University, Mansoura, EgyptNyaz FadhilAhmedResearcher at Faculty of Engineering Mansoura University, Mansoura, EgyptJournal Article20150813<strong>This paper discusses the performance and characteristics of desalination membranes used in treatment of water for potable use. In this study, The Desalination Economic Evaluation Program (DEEP) is a spreadsheet tool originally developed for the IAEA by General Atomics and later expanded in scope by the IAEA, The DEEP-5.1 version program allows designers and decision makers to compare performance and cost estimates of various desalination and power configurations. Desalination options modeled include MSF, MED, VC,RO and hybrid systems. This paper presents the results of the operational performance of RO units in experimental scale. The rate of decline of productivity for a period 38 Days is examined and described by simple power law function. The evaluation of the solvent and salt permeability coefficients with the time of operation is quantified. The results show the recovery, pressure and conductivity across the membrane for 38 days test run. Also, the results show the effect of chemical additives and operational parameters on the performance of the membrane during the cleaning. Based on such individual RO module data (one year) the product flow rate and Total Dissolved Solids (TDS) performance is calculated and RO module replacement ratio can be estimated. These developments can be utilized to improve the quality of surface seawater feed to the level comparable to, or better than the water quality from the well water sources. These new developments enable a more advanced RO system design which should result in increased reliability and lower water cost. And compare the result of reverse osmosis desalination conventional system with a mathematical model is built and solved with ROSA computer programs to get results for the design calculations of the reverse osmosis mode used to remove salt from the feed water. The principles of the reverse osmosis mode, the conditions and factors affecting their operation, are discussed. The number of stages with their arrangements in the reverse osmosis mode is calculated using the ROSA Program. A mathematical model and computer programs including all the mentioned cases are built and applied on the reverse osmosis mode of water stations. The results of these calculations are compared with the practical results and showed a fair good agreement.</strong>Mansoura University, Faculty of EngineeringMEJ- Mansoura Engineering Journal1110-092340620151201Comparative Study of Concrete-Encased Composite Column Strength.11910477110.21608/bfemu.2020.104771ENNabil S.MahmoudProf. of steel structures Mansoura University, Mansoura, EgyptSaad El-deen M.Abd-rabouProf. of steel structures Mansoura University, Mansoura, EgyptKhaled M. H.MegahedDemonstrator in structural Engineering Department Mansoura University, Mansoura, EgyptJournal Article20150716<strong>The objective of this study is to investigate the difference between three approaches used for the design of concrete encased composite columns. The first approach "ECP-SCLRFD [1]" considers the composite column as an equivalent to steel section, the second "Eurocode 4 [2] and AISC [3]" considers the composite column as composite section using rigid plastic stress distribution, and the third "ACI [4] and CSA [5]" is similar to second approach with elastic plastic stress distribution. The comparative study indicates that the second and third approach give good results for composite columns strength compared with the first approach according to physical test results done by previous researchers. Also, this paper suggested a proposed formula for interaction equation for composite columns.</strong>Mansoura University, Faculty of EngineeringMEJ- Mansoura Engineering Journal1110-092340620151201Static Analysis of Cable Stayed Structural System Used for Covering Stadia.203510477410.21608/bfemu.2020.104774ENYoussefAgagProfessor of Theory of Structures., Structural Engineering Department., Faculty of Engineering Mansoura University., Mansoura., Egypt.M.NaguibProfessor of theory of Structures., Structural Engineering Department., Mansoura University., Mansoura., Egypt.M.El-TantawyAssistant Professor., Structural Engineering Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egypt.AlshimaaAhmedAssistant Professor., Structural Engineering Department., Faculty of Engineering., El-Mansoura University.., Mansoura., Egypt.Journal Article20150820<strong>The aim of this work is to study the static response for steel cantilever roof stayed with cables used as a stadium roof due to wind steady state using ASCE 7-10 code. The best configuration for the model is generated using a FORTRAN program constructed by the author <sup>[1]</sup> to reach for the best arrangement of cables and cantilever space trusses that gives the lowest deflection and stresses in the structure. Then, the static analysis for the structure is carried out taking into account some study parameters depending upon where to attach the lower cable, the inclination of the roof, changing the panels’ length and height and the initial tension in cable elements. The analysis is carried out using a FORTRAN program constructed by the author <sup>[2]</sup> based on the minimization of the total potential energy by the conjugate gradient technique and checked using SAP2000 program.</strong>Mansoura University, Faculty of EngineeringMEJ- Mansoura Engineering Journal1110-092340620151201Evaluation of Using Modal Testing For Damage Detection in Masonry Arched Barrages.364310477610.21608/bfemu.2020.104776ENAhmed M.AnwarResearcher., Construction Research Institute., National Water Research Center., Egypt.Ahmed S.HashadAssociate Professor., Construction Research Institute., National Water Research Center., Egypt.Journal Article20150710<strong>Modal testing is widely used as a fast and effective tool for structural health monitoring and damage assessment. Old masonry barrages are characterized with their massive and rigid nature. Nevertheless, the complex material configurations make it difficult to be investigated and/or evaluated. This paper examined the ability and the constrains of using modal testing technique with masonry arches considering sensitivity and practicality. Masonry arches of a semi-circular shape with different stiffness and damage conditions were prepared and examined experimentally under static and dynamic tests. The dynamic characteristics for each condition were evaluated. A sound arch was degraded in two manners, the first by decreasing its thickness, while the other by applying severe crack experimentally. Additionally, Numerical investigation was conducted to simulate arches with different damage severities. Finite Element Model was calibrated using the material properties results obtained experimentally. The results of numerical study were compared with the experimental results to investigate the practicality and sensitivity of this technique. It has been noticed that the modal analysis testing can be used with masonry arches to determine any degradation occurred in arches. It is however; found that the technique was not powerful in identifying the reason behind this degradation. Moreover, correlation between the change in fundamental natural frequency and the corresponding reduction in stiffness was investigated.</strong>Mansoura University, Faculty of EngineeringMEJ- Mansoura Engineering Journal1110-092340620151201Evaluation of DAF For Steel Truss Railway Bridge Using Experimental and Numerical Approach.445210493410.21608/bfemu.2020.104934ENAhmedHashadAssociate Professor, Construction Research Institute, National Water Research Center, EgyptYasserEl-HakemProfessor, Construction Research Institute, National Water Research Center, Egypt.Journal Article20150926<strong>This research studies the differences between the real measured Dynamic Amplification Factor (DAF) and the calculated one according to the new Egyptian Standard. One of the arched steel railway bridges in Egypt was subjected to loading capacity evaluation process, during this process a study to evaluate the (DAF) was carried out.</strong><br /><strong> The actual DAF was determined experimentally by using dynamic loading tests that were carried out under the bridge normal operation conditions. The results of the dynamic loading tests were also validated by using numerical models for the bridge and the train loads. The numerical model was calibrated also with the results of the measured bridge dynamic characteristics.</strong><br /><strong> The results obtained from the experiments and from the numerical model were compared to the DAF obtained from the Egyptian standards. The research results indicated that, there is a considerable difference between the two actual values and the Egyptian standard calculated one. </strong>Mansoura University, Faculty of EngineeringMEJ- Mansoura Engineering Journal1110-092340620151201Electrocoagulation for Oil and Grease Wastewater Treatment Using Aluminum Electrodes.536310493610.21608/bfemu.2020.104936ENHisham K.El-EtribyAssoc. Prof.,Public Works Depart., Faculty of Eng., Mansoura University.Kamal H.RadwanAssoc. Prof.,Public Works Depart., Faculty of Eng., Mansoura University.KarimTahaPost graduate student, Demonstrator at high Nile Institute for
engineering and technologyJournal Article20150923<strong>Batch electrocoagulation (EC) experiments were carried out to evaluate the removal of COD and O&G from wastewater using aluminum electrodes. The effects of operating parameters such as current intensity, initial COD concentration, contact time and NaCl concentration on COD and O&G removal efficiency had been investigated. It was found that increasing current intensity increased COD and O&G removal efficiency. Initial COD concentration had a little effect on removal efficiencies. Results showed that the best performance was obtained using aluminum electrode at a current intensity of 1.3 Ampere and 11.6 volt in 15 min contact time for 1500 mg/L initial COD concentration and 0.5 gm/L NaCl concentration. Under these conditions, COD removal efficiency reached 95.07% and the cost of energy, chemicals and material consumption was 0.84 LE/ /gm COD removal. Similarly, the cost of treatment of cubic meter for carwash station wastewater equals .32 LE/gm COD removal after 7.5 min at 11.6 volt and 1.3 Ampere, using aluminum electrodes with removal efficiency of 71.1% .</strong>Mansoura University, Faculty of EngineeringMEJ- Mansoura Engineering Journal1110-092340620151201Evaluation of Bored Piles Load Capacity in Rock Bearing.647310495210.21608/bfemu.2020.104952ENM. F.TarekProfessor of Soil Mechanics and Foundation Engineering, Al-Azhar University, Cairo, EgyptM. A.BahrProfessor of Soil Mechanics and Foundation Engineering, Al-Azhar University, Cairo, Egypt.S. A.GadProfessor of Soil Mechanics and Foundation Engineering, Al-Azhar University, Cairo, EgyptA. H.ZakiM.Sc. Student, AL Azhar University, Cairo, EgyptJournal Article20150926<strong>Rock socketed bored piles are particularly advantageous for conditions in which rock is near the ground surface underlying weak layers. This paper aims to predicate the ultimate capacity of bored piles supported in rock using analytical and mathematically based graphical approaches. Data-base of pile load tests from three projects constructed in Abu-Dhabi city in UAE were used, and Finite Element Analysis using 2-D Plaxis axisymmetric model has been developed to simulate the behaviour of such piles. The ultimate load predicted from the FEM method is compared with that estimated from the theoretical approaches. The pile working load with the corresponding settlements estimated from the theoretical approaches based on reasonable factor of safety were evaluated based on the results of pile load tests.</strong><br /><strong> From this study it was found that, the results of pile ultimate load estimated from the static formula were closer to those predicted by the FEM, compared with those calculated by modified Chin and Hansen methods. Under the ultimate load settlement was about 2.3% of pile diameter. While the socket length of a pile into rock is an important factor, the strength and R.Q.D. of rock seem to be the most significant parameters even for lesser socket length. The limiting displacement, after which the applied axial load is shared between the side resistance and the base resistance, has found to vary between 0.3% to 1.1% of rock socketed pile length, depending on the rock strength and R.Q.D.</strong>Mansoura University, Faculty of EngineeringMEJ- Mansoura Engineering Journal1110-092340620151201Evaluation of Polymer Modified Asphalt Mixtures in Pavement Construction.748210495510.21608/bfemu.2020.104955ENI.AminMaster Student, Public Works Engineering Department, Faculty of Engineering, Mansoura University, EgyptR.AlabaseyGraduate Student, Public Works Engineering Department, Faculty of Engineering, Mansoura University, EgyptAbdelhalimAzamAssistant Professor, Public Works Engineering Department, Faculty of Engineering, Mansoura University, EgyptSherif MassoudEL-Badawy3Associate Professor, Public Works Dept., Faculty of engineering, Mansoura University, Egypt0000-0001-8348-1580A.GabrAssistant Professor, Public Works Engineering Department, Faculty of Engineering, Mansoura University, EgyptJournal Article20150826<strong>Traditional bitumen is expected to become brittle material at low temperatures therefore it may crack easily under repeated traffic loading or by thermal changes. On the other hand at high temperature, it is a soft material that ruts under traffic loading. Furthermore, the bitumen is not able to cope with the increase in traffic volumes/loading on roads. The use of the Polymer Modified Asphalt (PMA) in hot asphalt mixtures may improve the pavement performance and can increase the service life of the road.</strong><br /><strong> In this paper, the characterization of hot mix asphalt (HMA) modified with the PMA was evaluated and compared with the conventional mixtures. A comprehensive laboratory testing was conducted at Mansoura University Highway and Airport Engineering Laboratory (H&AE-LAB). The asphalt mixtures were designed by Marshall method and the percentage of the PMA ranged between 0 and 6% by the weight of the binder. The laboratory testing program include penetration test, softening point test, rotational viscometer test which was conducted on the PMA. For the asphalt mixtures, the experimental programs are the indirect tensile strength (IDT) and the percentage of loss of stability.</strong><br /><strong> The results showed that the asphalt mixture with 4% percentage PMA had the highest Marshall Stability and mix bulk density. In general, the findings of this study demonstrated that the use of PMA in asphalt mixes decrease the pavement rutting and increase the pavement life. </strong>Mansoura University, Faculty of EngineeringMEJ- Mansoura Engineering Journal1110-092340620151201Numerical Simulation of Groundwater Flow and Contaminant Transport in the Quaternary Aquifer in 10th of Ramadan City Area, East Delta, Egypt.839910497110.21608/bfemu.2020.104971ENAhmed A.Al-NimerSTRUCTURAL ENGINEERING DEPARTMENT, Faculty of Engineering- Mansoura UniversityMohamedGadProfessor of Water Resources at the Desert Research CenterEnasHusseinWater Research Center - Ministry of IrrigationJournal Article20150926<strong>The establishment of new communities and land reclamation projects in the Egyptian desert areas is one of the most important national targets. One of these areas is the 10<sup>th</sup> of Ramadan city. The main goal of the study is concerned with delineation of groundwater contaminants plume in the future. The results show that; the ions concentration of most samples from the oxidation ponds resources contain concentrations of Al<sup>3+</sup>, Cr<sup>2+</sup>, Fe<sup>2+</sup>, Ni<sup>2+</sup> and Sr<sup>2+</sup> exceeding the acceptable limit of WHO (1996) standards. Also, most of the groundwater samples are polluted with Al<sup>3+</sup> and Fe<sup>2+</sup> and Sr<sup>2+</sup> ions. The infiltration from the oxidation ponds and expansion of reclaimed lands irrigated with wastewater reflect critical environmental hazards. The results of the groundwater flow and transport simulation reveal contamination plume expansion. It will travel 1.8, 2.1 and 2.3 km due NE direction after for Al<sup>3+</sup>, Fe<sup>2+</sup> and Sr<sup>2+</sup>contaminants respectively. It is strongly recommended that wastes from oxidation ponds must not be used in irrigation without tertiary treatment. The oxidation ponds to minimize the pollution of groundwater with heavy metals is highly recommended.</strong>Mansoura University, Faculty of EngineeringMEJ- Mansoura Engineering Journal1110-092340620151201Study of Thermal Performance of Heat Pipe with Different Coated Wick Layers.11110515610.21608/bfemu.2020.105156ENM. G.MousaMechanical Power Engineering Dept., Faculty of Engineering, Mansoura University. Mansoura, Egypt.Ahmed A.HegaziMechanical Engineering Department, University of Mansoura, CO 35516, EgyptK.AbozidMechanical Engineering, Delta Company for Fertilizer and Chemical IndustriesJournal Article20150927<strong>An experimental investigation is carried out to study the effect of operating parameters such as filling ratio, input heat, number of wick layers and thin coated wick on the thermal performance of a heat pipe .A film coating is a thin polymer- based coat applied to wick .the thickness of such a coating is usually between 20-100 micro meter .film coating formulations usually contain the following components: polymer, plasticizer, colourant, opacifier, and solvent. Coated material is a covering that is applied to the surface of an object ,the purpose of applying the coating may be decorative ,functional, or both ,The coating itself may be an allover coating, completely covering the substance, Functional coatings may be applied to change the surface properties of the wick, demineralized water used as working fluid. The total thermal resistance decreases with increasing filling ratio until filling ratio around between 0.5 and 0.6 then increases with increasing filling ratio, The total thermal resistance decreasing with increasing the number of coated layers of wick ,The total thermal resistance decreases with increasing heat input .</strong>Mansoura University, Faculty of EngineeringMEJ- Mansoura Engineering Journal1110-092340620151201Comparing the Performance of Unconventional Median U-turn Intersections and Signalized Intersections: A Simulation Study.10010817321510.21608/bfemu.2015.173215ENUsamaElrawy ShahdahTraffic engineering, traffic safety, urban transportation planning
, Transportation Engineering
, Mansoura University0000-0001-9176-2956M.ElshabrawyProfessor emeritus., Public Works Engineering Department., Faculty of Engineering., El-Mansoura University., c., Egypt.S.ElbadawyAssociate Professo.r, Public Works Engineering Department, Faculty of Engineering, Mansoura University
Mansoura, Egypt 35516A.GabrAssistant Professor., Public Works Engineering Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egypt.A.AzamAssistant Professor., Public Works Engineering Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egypt.Journal Article20150829<strong>The Majority of intersections in Mansoura City are not controlled. The unconventional median U-turn (MUT) intersection design is the dominant design in Mansoura. In MUTs, right-turn movements are allowed for all approaches, but through movements are allowed only for the main street traffic. For left-turn in both the major and the minor streets and for through movements for the minor street traffic, vehicles must go through the U-turns in the median to complete their movement. For example, through movements on the minor street have to turn-right first into the main street then make a U-turn into the main street before making a right-turn into the minor street to continue to their destination. This paper presents the results of a simulation study for comparing the performance of the urban non-stranded 4-leg intersections with the signalized intersections. The VISSIM microscopic traffic simulation model was used in this analysis. The average delay per vehicle was used as the main measure of performance of the different intersections design with different traffic volumes.</strong>