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A new method for increasing the density of modulated sandy soils by using cement dust 提出了一种利用水泥粉尘提高调质砂土密度的新方法
Kufa Journal of Engineering Pub Date : 2021-09-25 DOI: 10.30572/2018/kje/121338
ليث جواد عزيز
{"title":"A new method for increasing the density of modulated sandy soils by using cement dust","authors":"ليث جواد عزيز","doi":"10.30572/2018/kje/121338","DOIUrl":"https://doi.org/10.30572/2018/kje/121338","url":null,"abstract":"\u0000This research is an empirical method for estimating the possibility of using cement dust as an additive for sandy soil during the field compaction process. The soil samples were brought from Al-Najaf city and treated with cement dust .Twenty test models were prepared and compacted in the standard and modified mould of Proctor test. These models were divided into two broad series, firstly consisted of ten soil samples, five from these samples were carried out at constant compactive energy (E=355.5 kJ/m3) for cement dust (4 , 8, 12 and 16%) in addition to one case with no cement dust. This energy is less than standard Proctor test energy. Another retained models were tested with compactive energy equal to the energy of standard Proctor test (E=592.5 kJ/m3) for the same percentage cement dust. The second series of models were involved ten models, five samples compacted at energy corresponding to Modified Proctor Test (E=1197.03 kJ/m3) and other retained models at compactive energy higher than compactive energy of the modified Proctor test (E=2681.4 kJ/m3). The results of laboratory tests which carried out on selected soil showed with increasing compactive energy, the optimum cement dust decreased (this percent was corresponding to the peak dry density in the laboratory) . In other words, the optimum cement dust percents were equal to (4%), (6.6%), (8%) and (12%) for compactive energy (E=355.5, 592.5, 1197.03 and 2681.4 kJ/m3) respectively, and the addition of these percents of cement dust leaded to increase in the maximum dry density (4%, 5.3%, 17.1% and 20.5%) for compactive energy (E=355.5, 592.5, 1197.03 and 2681.4 kJ/m3) respectively.\u0000","PeriodicalId":123515,"journal":{"name":"Kufa Journal of Engineering","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131230532","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
EVALUATE AND RECTIFICATE THE PERFORMANCE OF THE SPIRAL PUMP OF THE HOLLY KARBALA SEWAGE TREATMENT STATION 对霍利卡尔巴拉污水处理站螺杆泵的性能进行了评价和整改
Kufa Journal of Engineering Pub Date : 2021-09-25 DOI: 10.30572/2018/kje/211337
Aymen Rashad Noor
{"title":"EVALUATE AND RECTIFICATE THE PERFORMANCE OF THE SPIRAL PUMP OF THE HOLLY KARBALA SEWAGE TREATMENT STATION","authors":"Aymen Rashad Noor","doi":"10.30572/2018/kje/211337","DOIUrl":"https://doi.org/10.30572/2018/kje/211337","url":null,"abstract":"\u0000This paper evaluates the performance of the primary spiral (Archimedes) screw pump in the old sewage treatment station of the holly Karbala. This paper evaluates the pump according to its volumetric flow rate, determines the problems, diagnoses the defects, and finds the solutions. In addition, the paper suggests the optimum design for the pump. The results show a big effect of the side profile, pitch, and radius of the torque tube upon the discharge of the pump.\u0000","PeriodicalId":123515,"journal":{"name":"Kufa Journal of Engineering","volume":"322 9","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132417974","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of adding alumina on the hardness and wear resistance of Mg-Al Alloy 添加氧化铝对mg -铝合金硬度和耐磨性的影响
Kufa Journal of Engineering Pub Date : 2021-09-25 DOI: 10.30572/2018/kje/211341
عقيل علي العطار
{"title":"Effect of adding alumina on the hardness and wear resistance of Mg-Al Alloy","authors":"عقيل علي العطار","doi":"10.30572/2018/kje/211341","DOIUrl":"https://doi.org/10.30572/2018/kje/211341","url":null,"abstract":"\u0000\u0000\u0000\u0000\u0000\u0000Magnesium-Aluminum alloys considered specially Mg-6Al very important alloys in engineering applications, but this alloys have weakly wear resistance and low hardness, therefore, addition some materials such as (Al2O3) at (3%-4%-5%) weight percentage to improve the hardness and wear resistance. In this present research Mg-6Al was prepare as a master alloy then recast this alloy after adding (Al2O3) under argon gas in electrical furnace, then study the effect of this addition on the hardness and wear resistance of the master alloy.\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000 \u0000\u0000","PeriodicalId":123515,"journal":{"name":"Kufa Journal of Engineering","volume":"175 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115189695","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Accuracy Improvement of points elevation located by space Intersection 空间交点高程定位精度的提高
Kufa Journal of Engineering Pub Date : 2021-09-25 DOI: 10.30572/2018/kje/211342
حسن عبد الحسين الحسيني
{"title":"Accuracy Improvement of points elevation located by space Intersection","authors":"حسن عبد الحسين الحسيني","doi":"10.30572/2018/kje/211342","DOIUrl":"https://doi.org/10.30572/2018/kje/211342","url":null,"abstract":"\u0000\u0000\u0000\u0000\u0000\u0000This paper aim to create method to observe elevation of points, tower and structure that can’t be reach (or don’t be need to reach), this method depend on concept of space intersection where intersect two known direction vectors start from two known location points or can be located from simple computation. This paper discuss too accuracy improvement for points elevation observed by above method.\u0000\u0000\u0000\u0000\u0000\u0000","PeriodicalId":123515,"journal":{"name":"Kufa Journal of Engineering","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133778158","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Using integer linear numerical programming for the purpose of building a mathematical model that achieves optimal hospital management by providing the best medical services to hospitalized patients at the lowest financial costs. 利用整数线性数值规划的目的是建立一个数学模型，以最低的财务成本为住院患者提供最好的医疗服务，实现最优的医院管理。
Kufa Journal of Engineering Pub Date : 2021-09-25 DOI: 10.30572/2018/kje/121339
سعد عبد السادة غني
{"title":"Using integer linear numerical programming for the purpose of building a mathematical model that achieves optimal hospital management by providing the best medical services to hospitalized patients at the lowest financial costs.","authors":"سعد عبد السادة غني","doi":"10.30572/2018/kje/121339","DOIUrl":"https://doi.org/10.30572/2018/kje/121339","url":null,"abstract":"In this paper an integer programming model was built to obtain an optimal utilization of the available medical resources(human and equipments) in the emergency department in Al-yarmouk hospital. According to model results a plan can be implemented for ministry of health to help the management of al-yarmouk hospital to distribute the available resources in an optimal manner to achieve an optimal medical service to the people who need this medical service.","PeriodicalId":123515,"journal":{"name":"Kufa Journal of Engineering","volume":"64 41","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134195863","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Reactivation For Compression Springs Steel Type ASTM – A232. ASTM - A232型钢压缩弹簧的再活化。
Kufa Journal of Engineering Pub Date : 2021-09-25 DOI: 10.30572/2018/kje/211340
محمد حميد جعفر, موجد هادي عناد, سعد رزاق مجيد
{"title":"Reactivation For Compression Springs Steel Type ASTM – A232.","authors":"محمد حميد جعفر, موجد هادي عناد, سعد رزاق مجيد","doi":"10.30572/2018/kje/211340","DOIUrl":"https://doi.org/10.30572/2018/kje/211340","url":null,"abstract":"\u0000The aim of this research is the reactivation of secondhand ((scrap)) steel compression springs, which used in one of private plastic factory, by applying the heat - treatment with three methods. 1- Quenching only. 2- Quenching and tempering. 3- Annealing , quenching and tempering.Were doing in the under supply conditions. The microstructures inspected for the specimen from any model by 500 X. The compression and hardness tests for the secondhand springs have done before and after the heat - treatment process and compare each one with the standard specification of springs. The best results for hardness and stiffness tests , and nearer for standard specification of springs . Which obtained at [50.8 HRC ] and stiffness is [31.6] N/ mm that is at applied the third model from the heat - treatment [ Annealing + Quenching + Tempering ].\u0000","PeriodicalId":123515,"journal":{"name":"Kufa Journal of Engineering","volume":"142 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115181799","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
تحضير فلز الخارصين من محلول كبريتات الخارصين بالاسلوب الكهروكيميائي 用电化学方法硫酸溶液中提取出的金属
Kufa Journal of Engineering Pub Date : 2021-09-25 DOI: 10.30572/2018/kje/321343
جميل يوسف عبدالرضا
{"title":"تحضير فلز الخارصين من محلول كبريتات الخارصين بالاسلوب الكهروكيميائي","authors":"جميل يوسف عبدالرضا","doi":"10.30572/2018/kje/321343","DOIUrl":"https://doi.org/10.30572/2018/kje/321343","url":null,"abstract":"Experimental result are presented for the preparation of zinc metal from Zinc Sulphate solution using electrochemical process. Laboratory cell which equipped with lead anode and aluminum cathode, was designed and utilized to obtain experimental result which was necessary for proceeding of the designated objective of this work. In the present experiment about 121 gm.-Zn / L solution was electrolyzed batch-wise at a current density rang 0.03-0.1 Amp./cm2 at a temperature of 40 to 45 ◦C. The effect of electrolytes concentration and the final concentration of zinc ions and sulphuric acid formed were also tested. The current efficiency of about 92% was obtained for 75% zinc ions conversion, at optimum condition mainly current density of 0.08 Amp./cm2 ,temperature of about 40 ◦C. The above current efficiency is similar to that reported in related studies.","PeriodicalId":123515,"journal":{"name":"Kufa Journal of Engineering","volume":"45 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132185109","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
ANALYSIS OF REINFORCED CONCRETE COLUMNS FITTED INSIDE STEEL CASINGS 钢壳内嵌钢筋混凝土柱分析
Kufa Journal of Engineering Pub Date : 2021-09-21 DOI: 10.30572/2018/kje/611315
Amjad Hameed Abd Al-Razaq
{"title":"ANALYSIS OF REINFORCED CONCRETE COLUMNS FITTED INSIDE STEEL CASINGS","authors":"Amjad Hameed Abd Al-Razaq","doi":"10.30572/2018/kje/611315","DOIUrl":"https://doi.org/10.30572/2018/kje/611315","url":null,"abstract":"Due to construction costs and operational issues have been in this study to discuss how to strengthen the concrete columns. The results of previous studies on the construction of some structures earthquake-prone weakness reinforced concrete columns. The inside steel casings surrounding the columns is a modern technique used in many countries today for columns of rectangular and circular concrete. The advantages of this method is convenient, economical and easy. Reference model in this study is a column concrete without casing steel and the others concrete columns were wrapped casings steel to study the amount of retrofitting, and which has been approved changing the thickness of the cover steel are the main variable in this research. Were analyzed columns under the effect of axial force using the finite element method by using the program ANSYS (version 11). The results showed that increase the susceptibility of the inside steel casings bearing concrete columns of force inflicted by the largest of the main form without the steel casing, as well as to increase the thickness of the cover leads to increased endurance.","PeriodicalId":123515,"journal":{"name":"Kufa Journal of Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129685790","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
EVALUATION THE SHEAR STRENGTH OF FIBROUS REACTIVE POWDER CONCRETE BEAMS STRENGTHENED WITH CFRP STRIPS CFRP条加固纤维活性粉末混凝土梁抗剪强度评价
Kufa Journal of Engineering Pub Date : 2021-09-21 DOI: 10.30572/2018/kje/611313
Kaiss F. Sarsam, Shakir A. Al-Mishhadani, Alaa M. Al-Habbobi
{"title":"EVALUATION THE SHEAR STRENGTH OF FIBROUS REACTIVE POWDER CONCRETE BEAMS STRENGTHENED WITH CFRP STRIPS","authors":"Kaiss F. Sarsam, Shakir A. Al-Mishhadani, Alaa M. Al-Habbobi","doi":"10.30572/2018/kje/611313","DOIUrl":"https://doi.org/10.30572/2018/kje/611313","url":null,"abstract":"A new expression for estimating the ultimate shear strength of steel fibers reinforced high strength concrete (SFRHSC) beams strengthened with CFRP strips based on previous researches is proposed in this research. The proposed expression covers different characteristics and principal parameters such as concrete compressive strength, shear span to effective depth ratio, volume fraction of steel fibers, CFRP amount and distribution, CFRP stiffness, deep beam effect, as well as the end anchorage state of the CFRP strips with the beam. A comparison between computed values and experimentally observed values (with a low COV of about 3.58 %) shows the validation of the proposed theoretical treatment.","PeriodicalId":123515,"journal":{"name":"Kufa Journal of Engineering","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132934747","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
EFFECT OF SOIL DENSITY AND PLUG CHARACTERISTICS ON BEHAVIOR OF SINGLE PIPE PILE EMBEDDED IN COHESIONLESS SOIL AND SUBJECTED TO UPLIFT FORCE 土密度和桩塞特性对无黏性土中单管桩抗拔性能的影响
Kufa Journal of Engineering Pub Date : 2021-08-09 DOI: 10.30572/2018/kje/120301
H. S. Hamadi, H. A. Abdul-Husain
{"title":"EFFECT OF SOIL DENSITY AND PLUG CHARACTERISTICS ON BEHAVIOR OF SINGLE PIPE PILE EMBEDDED IN COHESIONLESS SOIL AND SUBJECTED TO UPLIFT FORCE","authors":"H. S. Hamadi, H. A. Abdul-Husain","doi":"10.30572/2018/kje/120301","DOIUrl":"https://doi.org/10.30572/2018/kje/120301","url":null,"abstract":"It is a significant issue to analyze and understand the pile’s behavior as well as to predict the piles’ capacity exposed to uplifting load when designing a foundation. Experimental model tests have been conducted for a single pile embedded in cohesionless soil and subjected to uplift force. The experimental tests were performed using open-ended steel pipe piles with circular cross-sectional area an outer diameter of 50 mm in steel soil box (0.5*0.5) with four different height (0.30, 0.50 and two with 0.40 m). The tested piles have been embedment with penetration ratios (PR=L/D) of 10. Three different densities (25%, 50% and 75%) have been used to perform the tests. In addition three tests have been made with relative density of 50% to investigate the function the developed soil column inside the pile (soil plug) during installation. The results revealed that the behavior of single piles depends mainly on soil density and the ultimate pull-out capacity of the pile increases with the increasing of the soil relative density and used the data from this tests to presented formula to estimate the IFR and takes the soil state parameter as a qualitative variable. The results showed also that the removing of plugging soil decreases the pile’s pull-out capacity by about 85%. Whilst, using of closed-end or filled with concrete give higher capacity than that of open-end pipe pile by about 33% and 87% respectively.","PeriodicalId":123515,"journal":{"name":"Kufa Journal of Engineering","volume":"128 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116040367","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
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