Engineering and Technology Journal最新文献

{"title":"Investigating The Effect of Various Parameters on The Yield of Graphene Obtained Through Graphite Exfoliation Using CO2 Supercritical Fluid","authors":"S. Saeedi, Javad Sargolzaei","doi":"10.30684/etj.2023.143211.1569","DOIUrl":"https://doi.org/10.30684/etj.2023.143211.1569","url":null,"abstract":"characterized by TEM, RAMAN, XRD, and AFM techniques. Based on the obtained results, it was found that mono/bilayer graphene was obtained by applying optimum conditions. The results confirmed the formation of mono/bilayer graphene based on the G-Band of 1583 cm -1 in the Raman test, a wavelength of 26.44° in the XRD test, and a thickness of 1.5 nm in the AFM test. With a simple, low-cost approach, this method, without using toxic and expensive chemicals with high profitability, can replace other complex graphene production methods, such as chemical vapor leakage and plasma etching, and be chemically reduced. .","PeriodicalId":507832,"journal":{"name":"Engineering and Technology Journal","volume":"118 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139135392","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}

{"title":"Manufacturing of Sustainable Ultra-High-Performance Concrete Using Response Surface Methods","authors":"Abbas Mohammed, Maan Hassan, H. Al-Quraishi","doi":"10.30684/etj.2023.143595.1598","DOIUrl":"https://doi.org/10.30684/etj.2023.143595.1598","url":null,"abstract":"3 of locally sourced limestone powder in the mixture with a w/b ratio equal to 0.198 and a 48hr-90°C curing regime can be considered the optimal amount to secure the greatest modeling compressive strength (169.10 MPa at 7 days and 181.71 MPa at 28 days), fulfilling the limit values of spread flow (220 mm) with the increasing percentage ratio of 67% and 49% at 7-days and 28-days ages under 90°C heat curing when the w/b equals 0.198.","PeriodicalId":507832,"journal":{"name":"Engineering and Technology Journal","volume":" 32","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139141675","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}

{"title":"Effect of Structure Height on Seismic Response of Adjacent Structures Considering Soil-Structure Interaction","authors":"Mohammed Abdulaziz, M. Hamood, Mohammed Fattah","doi":"10.30684/etj.2023.143892.1614","DOIUrl":"https://doi.org/10.30684/etj.2023.143892.1614","url":null,"abstract":"the dynamic behavior between two adjacent steel structures rested on sand soil. This study employed four novel small-scale multi-degree-of-freedom steel structure models: three, four, and five-story steel structures against a three-story steel structure. The results indicated that the tallest building had the maximum effect on the shorter one, especially on the top displacement with a peak value of 3.82 mm, top acceleration with a peak value of about 0.2 g, and foundation rotation with a peak value of around 1 degree. However, the effect of the structure height has a reverse impact on the soil pressure beneath the foundation of the shortest structure since the largest pressure response was recorded for the effect of the shortest similar adjacent building with a peak value of 8.8 kPa. In comparison, the highest building has the lowest effect on the shortest building, with a peak value of 6 k Pa.","PeriodicalId":507832,"journal":{"name":"Engineering and Technology Journal","volume":" 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139142657","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}

{"title":"Assessment of Properties of Composite Boards from Groundnut Shells and Sawdust for their suitability for Structural Applications","authors":"Ekong Nathaniel, Nsikak Ekpenyong, Casmir Zanders Akaolisa, Okwet Yawo, Grace Umoren, Samuel Akpan","doi":"10.30684/etj.2023.144328.1628","DOIUrl":"https://doi.org/10.30684/etj.2023.144328.1628","url":null,"abstract":"conductivity, specific heat capacity, thermal diffusivity, thermal inertia, availability, and flexural strength. The results revealed improvement in the samples' thermal insulation performance as the SDP proportion increased from 0% to 100%. Though samples fabricated with 50 % each of the SDP and GSP exhibited a balance in the thermophysical and mechanical properties, all the samples could ensure better thermal insulation than conventional ceilings such as Isorel and plywood. Generally, the samples can be used as ceiling panels or partition elements in building design. This idea of utilizing groundnut shells and sawdust to develop composite panels for building purposes, as described herein, has been reported for the first time. It could help to ensure the construction of affordable and thermally safe buildings while solving the problems associated with their disposal.","PeriodicalId":507832,"journal":{"name":"Engineering and Technology Journal","volume":"78 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139146490","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}

{"title":"The Electrical and Mechanical Aspects of Aluminum and Copper Resistance Spot Weld Joints","authors":"Marwah Fakhri, Ibtihal Mahmood, Ahmed Al-Mukhtar","doi":"10.30684/etj.2023.143734.1606","DOIUrl":"https://doi.org/10.30684/etj.2023.143734.1606","url":null,"abstract":"resistance spot","PeriodicalId":507832,"journal":{"name":"Engineering and Technology Journal","volume":"316 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139152384","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}

{"title":"INVESTIGATION DYNAMIC PROPERTIES OF SOIL (THE DAMPING RATIO AND SHEAR MODULUS) FOR RESISTANCE DESIGN AT THE LNG BAC LIEU GAS PIPELINE PROJECT BY CYCLIC TRIAXIAL TEST","authors":"Ngoc Thai Ba, Vinh Bui Trong, Phong Le Thanh","doi":"10.47191/etj/v8i12.09","DOIUrl":"https://doi.org/10.47191/etj/v8i12.09","url":null,"abstract":"The LNG Bac Lieu gas pipeline project is part of the 3.200MW LNG power plant complex in Bac Lieu province. The entire pipeline will be designed underground at the sea floor to be directly subjected to dynamic loads (earthquakes, waves ...). Soil response to dynamic loads is measured by the soil's dynamic properties such as dynamic strength, shear modulus and damping ratio. These soil parameters are very significant to study the movement of the ground as well as the local reaction of soil sediments under the effect of loads and cyclic soil structure. Therefore, it is very important to investigate the earth's dynamic properties (dynamic strength, damping ratio and shear modulus) to design seismic resistance for this project. From the relevant literature, it is known that the dynamic properties of the soil are influenced by the soil type and the position of the soil structure. 6 soil samples were examined randomly at different depths to determine soil properties. When studying dynamic strength, people often use direct test methods such as torsion cutting, cyclic flat cutting and cyclic triaxial test to determine the dynamic strength (dynamic resistance) of the soil. In which, the cyclic triaxial test method allows the simulation of real-world conditions to be easily simulated. The results of applying this method to soft clay and clay phases show that the damping ratio is 0.117-0.162D, the average is 0.136D, the shear module is 1650-2632kPa, the average is 2141kPa.","PeriodicalId":507832,"journal":{"name":"Engineering and Technology Journal","volume":"50 5-1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139157152","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}

{"title":"SUPPLY CHAIN RISK MANAGEMENT MODEL: CASE STUDY OF THE PRECAST CONCRETE COMPANY PT. ADI JAYA BETON DENPASAR","authors":"I. W. Muka, Putu Ika Wahyuni, I. K. Widiarca","doi":"10.47191/etj/v8i12.08","DOIUrl":"https://doi.org/10.47191/etj/v8i12.08","url":null,"abstract":"Risk management is the process of measuring or assessing risk and developing management strategies. Risk analysis in the supply chain is an important issue, because companies are often not aware of risks until these risks arise and become a problem for the company. This research aims to analyze supply chain risks in the precast concrete industry. The data used is qualitative and quantitative data with primary data sources and secondary data. The data collection techniques used were observation, interviews, questionnaires, literature study and documentation study. The data analysis technique used is risk analysis with a probability and impact matrix. The research results show that 1) There are 20 identified supply chain risks in the precast concrete industry with a made to order system. 2) Supply chain risks in the precast concrete industry are categorized into four levels, namely a minor level of four risks, a moderate level of 12 risks, a major level of three risks, and a critical level of one risk. 3) Supply chain risk handling in the precast concrete industry can be carried out based on the level of risk, namely by accepting risk, mitigating risk, sharing risk, and avoiding risk.","PeriodicalId":507832,"journal":{"name":"Engineering and Technology Journal","volume":"65 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139155133","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}

{"title":"Investigating the Impact of Process Parameters on Thinning and Formability in Aluminum Alloy AA 1050 Incremental Sheet Metal Forming","authors":"Safaa Ghazi, Aqeel Bedana, M. Salloom","doi":"10.30684/etj.2023.143119.1561","DOIUrl":"https://doi.org/10.30684/etj.2023.143119.1561","url":null,"abstract":"To make cone-shaped structures with SPIF, the spindle speed (1000, 1500, and 2000 RPM), feed rate (200, 400, and 600 mm/min), tool width (8, 10, and 12 mm), and step-down (0.2, 0.4, and 0.6 mm) at the specimen interface were all changed. For aluminum alloy AA 5010, the maximum thinning (mm) and formability (%) were the important mechanical qualities. The L9 orthogonal array was used for a complete look at these qualities. Making high-quality cones using a computer numerically controlled machine was the aim of this research. (CNC) machine. The important factors affecting engineering and forming quality were studied using the Taguchi and analysis of variance methods. The most influential factor on maximum thinning was the rotational speed followed by the feeding, which is inversely proportional to it. In contrast, the most effective factor on the formability is the feeding followed by the rotational speed, which is directly proportional to it. It was discovered that a spindle speed of 1500 revolutions per minute (RPM), a feed rate of 200 millimeters per minute (mm/min), a tool diameter of 10 millimeters (mm), and a step down of 0.4 millimeters provide the least amount of maximum thinning (mm) and formability (percent).","PeriodicalId":507832,"journal":{"name":"Engineering and Technology Journal","volume":"10 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139157918","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}

{"title":"Numerical Study of the Effect of Thermal Insulation and Window-to-wall Ratio on Reducing the Thermal Loads of the Residential Sector in Iraq","authors":"Abd Hussein, Ahmed saleh, Hamdi Ahmed","doi":"10.30684/etj.2023.143408.1584","DOIUrl":"https://doi.org/10.30684/etj.2023.143408.1584","url":null,"abstract":"Gypsum, Juss, and high-density concrete covered with sand and shtyger under weather conditions of Baghdad city with coordinates 33° N latitude and 44° E longitude, and to study the essential parameters such as building envelope, window-to-wall ratio (WWR), and internal sources that have a direct impact on the residential buildings. These parameters were processed and optimized to minimize the thermal loads annually. The results show that the optimal WWR is 25% in the south orientation. The annual thermal load can be reduced by about 49 % when covering the building envelope with a thermal insulation type (stone wall) with a thickness of 5 cm.","PeriodicalId":507832,"journal":{"name":"Engineering and Technology Journal","volume":"18 s1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139158109","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}

{"title":"ANALYSIS OF MARSHALL CHARACTERISTICS WITH FLY ASH MATERIAL FOR STONE DUST SUBSTITUTION AS FILLER IN HRS-WC MIXTURE","authors":"Yasruddin, Nova Widayati, Feronia Azcharyah, Muhammad Baihaki, Feby Valentino, Chairul M. Rifqi Al-Asdi","doi":"10.47191/etj/v8i11.19","DOIUrl":"https://doi.org/10.47191/etj/v8i11.19","url":null,"abstract":"Lataston asphalt mix is a thin layer of asphalt concrete that is often used on light-traffic roads because it produces roads with good flexibility and durability. An economical way of doing this is to vary the asphalt mix, especially by modifying fillers, to improve the quality of the road pavement and asphalt mix. So, an alternative was found, namely the use of fly ash, residue from the Asam-Asam PLTU. The filler material for fly ash which will be varied with the filler for stone dust, plays a role in filling the voids between aggregate grains in the Hot Rolled Sheet-Wearing Course (HRS-WC) mixture with each predetermined composition. This study aims to determine the characteristics of the HRS-WC asphalt mixture with respect to the utilization rate of rock dust and fly ash fillers. To find out the characteristics of a HRS-WC mixture with mixed variations of the two fillers, the method that will be used is the Marshall Test by analyzing each characteristic of the parameters to be obtained in accordance with the 2018 Revised Highways Specifications II Year 2018 to make the mixture hot asphalt. The bitumen content used in this study was 4.5%, 5.0%, 5.5%, 6.0%, and 6.5%, with varying levels of fly ash and rock dust filler, namely 100%: 0%, 80%: 20%, 50%: 50%, 20%: 80%, and 0%: 100%. The results of the Marshall characteristic calculation analysis show that the asphalt mixture with lataston is very influential in the substitution of rock ash as a fly ash filler. Lataston asphalt mixture tends to be stiff and easily cracked because it has a high stability value of 1,615.38 kg and the lowest flow value of 4.10% in the 100% fly ash filler variation. At optimal asphalt content, the HRS-WC asphalt mixture for each variation in the range of fly ash and rock dust produces a decreased asphalt content because the water absorption capacity of rock dust is less than that of fly ash filler, so less asphalt is needed. In addition, the HRS-WC asphalt mixture also shows increasing durability, along with the replacement of rock dust filler with fly ash filler, which can be seen from the increased stability values, MQ values, and VFB values.","PeriodicalId":507832,"journal":{"name":"Engineering and Technology Journal","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139199418","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}