The research aim is studying high elevated temperatures influence on NSHSC compressive strength . Effects of nanosilica (NS) content and several elevated temperatures [200, 400 and 600°C] At 2hours heat exposure time were studied. A constant water/binder equals to 0.40 and a constant binder content =500kg/m3 were used. NS percentages that replaced cement in this study were 0,1%,2% and 3%. 96 cubes 10x10x10 cm were examined under compressive loads. They were divided as following, 24 cubes without (NS)as a reference and 72 cubes were cast to study NS content effect at several high temperatures. It was found that, at high elevated temperatures the NS content posses a large influence on improvement high strength concrete [HSC] performance.
{"title":"The Effect of High Elevated Temperatures on Nano Silica High Strength Concrete [NSHSC]","authors":"K. Ibrahim","doi":"10.9790/1684-1404026166","DOIUrl":"https://doi.org/10.9790/1684-1404026166","url":null,"abstract":"The research aim is studying high elevated temperatures influence on NSHSC compressive strength . Effects of nanosilica (NS) content and several elevated temperatures [200, 400 and 600°C] At 2hours heat exposure time were studied. A constant water/binder equals to 0.40 and a constant binder content =500kg/m3 were used. NS percentages that replaced cement in this study were 0,1%,2% and 3%. 96 cubes 10x10x10 cm were examined under compressive loads. They were divided as following, 24 cubes without (NS)as a reference and 72 cubes were cast to study NS content effect at several high temperatures. It was found that, at high elevated temperatures the NS content posses a large influence on improvement high strength concrete [HSC] performance.","PeriodicalId":14565,"journal":{"name":"IOSR Journal of Mechanical and Civil Engineering","volume":"176 1","pages":"61-66"},"PeriodicalIF":0.0,"publicationDate":"2017-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85032967","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}
In today’s scenario, small scale and large scale industries, hotels, restaurants and houses use chimneys in maximum quantity because of their needs. Due to continuous usage, the chimney surfaces will get covered with soot particles, oil, grease, etc. Nowadays these contaminants are removed using vibrating wire brushes and vacuum cleaners. But this may affect the surface integrity and the cleaning is not up to a satisfactory level. It is difficult to reach all the corners of the chimney and to reach the complete height of the chimney for cleaning. By keeping all these parameters, in this investigation we plan to fabricate a chimney cleaning machine for different applications. Pump is to be modified in such a way that it should not react with the chemicals used in cleaning process, by selecting a proper material. The machine is fabricated with minimum joining processes. After the fabrication, the machine is successfully working on expected condition to remove the dust particles, oil and grease from the surface completely without affecting the surface integrity. It is cleaning efficiently and effectively. It can clean each and every corner of the chimney and it can cover the entire height of the chimney.
{"title":"Fabrication of Chimney Cleaning System","authors":"Y. Suresh, Pramod, R. Prabhu, L. Nikhil","doi":"10.9790/1684-1404022329","DOIUrl":"https://doi.org/10.9790/1684-1404022329","url":null,"abstract":"In today’s scenario, small scale and large scale industries, hotels, restaurants and houses use chimneys in maximum quantity because of their needs. Due to continuous usage, the chimney surfaces will get covered with soot particles, oil, grease, etc. Nowadays these contaminants are removed using vibrating wire brushes and vacuum cleaners. But this may affect the surface integrity and the cleaning is not up to a satisfactory level. It is difficult to reach all the corners of the chimney and to reach the complete height of the chimney for cleaning. By keeping all these parameters, in this investigation we plan to fabricate a chimney cleaning machine for different applications. Pump is to be modified in such a way that it should not react with the chemicals used in cleaning process, by selecting a proper material. The machine is fabricated with minimum joining processes. After the fabrication, the machine is successfully working on expected condition to remove the dust particles, oil and grease from the surface completely without affecting the surface integrity. It is cleaning efficiently and effectively. It can clean each and every corner of the chimney and it can cover the entire height of the chimney.","PeriodicalId":14565,"journal":{"name":"IOSR Journal of Mechanical and Civil Engineering","volume":"5 1","pages":"23-29"},"PeriodicalIF":0.0,"publicationDate":"2017-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85937159","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}
The concrete loses its strength and stiffness when exposed to high temperatures as they accumulate damage. The primary question remaining after a exposure to high temperature is what level of residual strength and the stiffness exists for material. This residual strength is particularly important for high-rise structures where post-fire decision-making hinges on functionality of the columns. This study specifically addresses the experimental program carried out to assess the residual compressive strength of cube specimens. Three type of concretes viz normal , high strength and fly ash concrete specimens were considered. These specimens are tested in two separate condition states. The first representing air-cooled state involves heating the specimen to the required temperature for prescribed duration and air cooled to the room temperature. Phase two involves heating the specimen to the required temperature for the prescribed duration and immediately cooled to the room temperature by immersing it in the water or called water quenched. The strength and stiffness degradation of concretes for various grades has been studied and compared with the similar studies carried by other researchers.
{"title":"Experimental Study on Strength Reduction Factor in Concrete Specimen Subjected To High Temperature","authors":"K. Thamaraiselvan","doi":"10.9790/1684-1403076064","DOIUrl":"https://doi.org/10.9790/1684-1403076064","url":null,"abstract":"The concrete loses its strength and stiffness when exposed to high temperatures as they accumulate damage. The primary question remaining after a exposure to high temperature is what level of residual strength and the stiffness exists for material. This residual strength is particularly important for high-rise structures where post-fire decision-making hinges on functionality of the columns. This study specifically addresses the experimental program carried out to assess the residual compressive strength of cube specimens. Three type of concretes viz normal , high strength and fly ash concrete specimens were considered. These specimens are tested in two separate condition states. The first representing air-cooled state involves heating the specimen to the required temperature for prescribed duration and air cooled to the room temperature. Phase two involves heating the specimen to the required temperature for the prescribed duration and immediately cooled to the room temperature by immersing it in the water or called water quenched. The strength and stiffness degradation of concretes for various grades has been studied and compared with the similar studies carried by other researchers.","PeriodicalId":14565,"journal":{"name":"IOSR Journal of Mechanical and Civil Engineering","volume":"28 1","pages":"60-64"},"PeriodicalIF":0.0,"publicationDate":"2017-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85132346","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}
A treatability study was carried out on wastewater collected from Bhandewadi Wastewater treatment plant, Nagpur, Maharashtra. The aim of the research work was to check out whether the activated carbon (AC) gives maximum removal of BOD, COD, pH, Turbidity from wastewater sample. The present research work was undertaken to find out percentage of activated carbon is more efficient for removing the characteristics of wastewater like BOD, COD for safe disposal in water streams and land. The raw wastewater is put under contact of activated carbon and checked the efficiency of the activated carbon for reducing down the harmful parameters. The wastewater is given an exposure to activated carbon at 2%, 4% and 6% for 7 and 14 days.
{"title":"Activated Carbon as Adsorbent In Advance Treatement of Wastewater","authors":"V. Agrawal, V. Vairagade, A. P. Kedar","doi":"10.9790/1684-1404023640","DOIUrl":"https://doi.org/10.9790/1684-1404023640","url":null,"abstract":"A treatability study was carried out on wastewater collected from Bhandewadi Wastewater treatment plant, Nagpur, Maharashtra. The aim of the research work was to check out whether the activated carbon (AC) gives maximum removal of BOD, COD, pH, Turbidity from wastewater sample. The present research work was undertaken to find out percentage of activated carbon is more efficient for removing the characteristics of wastewater like BOD, COD for safe disposal in water streams and land. The raw wastewater is put under contact of activated carbon and checked the efficiency of the activated carbon for reducing down the harmful parameters. The wastewater is given an exposure to activated carbon at 2%, 4% and 6% for 7 and 14 days.","PeriodicalId":14565,"journal":{"name":"IOSR Journal of Mechanical and Civil Engineering","volume":"89 1","pages":"36-40"},"PeriodicalIF":0.0,"publicationDate":"2017-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80311529","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}
In this experimental study, attempts have been made to model and optimize welding process parameters for welding dissimilar weld of MONEL 400 and AISI 304 based on Response Surface Methodology (RSM) by using statistical software, Design Expert (DX-6). Five independent input parameters, viz., welding current, V grove angle of joint, filler rod material, filler rod diameter and welding speed were performed to explore the influence on hardness and fatigue strength of joint. The regression equation, and ANOVA was developed using the experimental data and graphs were plotted to investigate the effect of process variables on response characteristics. Optimal setting for multi response characteristics means for both hardness and fatigue strength of welding joint are 124 amp welding current, 35 0 joint angle, 0.52 filler rod diameter, MONEL 400 filler rod and 3.40 mm/sec welding speed.
{"title":"Multi Response Optimization TIG welding parameters for dissimilar weld of MONEL 400 and AISI 304 using RSM","authors":"J. S. Gill, S. Jolly, C. S. Kalra","doi":"10.9790/1684-1404024148","DOIUrl":"https://doi.org/10.9790/1684-1404024148","url":null,"abstract":"In this experimental study, attempts have been made to model and optimize welding process parameters for welding dissimilar weld of MONEL 400 and AISI 304 based on Response Surface Methodology (RSM) by using statistical software, Design Expert (DX-6). Five independent input parameters, viz., welding current, V grove angle of joint, filler rod material, filler rod diameter and welding speed were performed to explore the influence on hardness and fatigue strength of joint. The regression equation, and ANOVA was developed using the experimental data and graphs were plotted to investigate the effect of process variables on response characteristics. Optimal setting for multi response characteristics means for both hardness and fatigue strength of welding joint are 124 amp welding current, 35 0 joint angle, 0.52 filler rod diameter, MONEL 400 filler rod and 3.40 mm/sec welding speed.","PeriodicalId":14565,"journal":{"name":"IOSR Journal of Mechanical and Civil Engineering","volume":"1 1","pages":"41-48"},"PeriodicalIF":0.0,"publicationDate":"2017-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76572774","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}
Soil is most unpredictable materials for civil engineering construction. The objective of this paper is to improve natural soil as a construction material using cement and fly ash. In this paper, ordinary portland cement and fly ash were evaluated as potential stabilizers in enhancing mechanical properties of natural soil. The soil collected from the selected side of Barisal region used in this study for soil stabilization by mixing various percentage of cement content 5%, 10% and 15% with respect to dry soil. The Unconfined Compression Strength (UCS) and California Bearing Ratio (CBR) test performed on curing period of 7 days, 14 days, 21 days and 28 days. Improvement of UCS and CBR values observed with the rapid increment in the percentages of cement and fly ash content. During treatments, Cement was the most effective treatment of this soil, where the soil mechanical property enhancements considered as significant. In addition, fly ash mixed soil strength development also considerable because of its cost-effectiveness. It also found that the strength and CBR values improve with the increasing of curing period. The suitability of the stabilization technique have been studied with respect to the cost and strength.
{"title":"A Comparative Study on Stabilization of Natural Medium Expansive Soil using Cement and Fly ash","authors":"M. J. Alam, S. Hossain, Prince Reza, R. Islam","doi":"10.9790/1684-1404023035","DOIUrl":"https://doi.org/10.9790/1684-1404023035","url":null,"abstract":"Soil is most unpredictable materials for civil engineering construction. The objective of this paper is to improve natural soil as a construction material using cement and fly ash. In this paper, ordinary portland cement and fly ash were evaluated as potential stabilizers in enhancing mechanical properties of natural soil. The soil collected from the selected side of Barisal region used in this study for soil stabilization by mixing various percentage of cement content 5%, 10% and 15% with respect to dry soil. The Unconfined Compression Strength (UCS) and California Bearing Ratio (CBR) test performed on curing period of 7 days, 14 days, 21 days and 28 days. Improvement of UCS and CBR values observed with the rapid increment in the percentages of cement and fly ash content. During treatments, Cement was the most effective treatment of this soil, where the soil mechanical property enhancements considered as significant. In addition, fly ash mixed soil strength development also considerable because of its cost-effectiveness. It also found that the strength and CBR values improve with the increasing of curing period. The suitability of the stabilization technique have been studied with respect to the cost and strength.","PeriodicalId":14565,"journal":{"name":"IOSR Journal of Mechanical and Civil Engineering","volume":"16 1","pages":"30-35"},"PeriodicalIF":0.0,"publicationDate":"2017-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89656098","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}
Computational fluid dynamic software ANSYS Fluent 15.0 is used to predict the physical parameters on the external surface of a vehicle. The simulation of the wind tunnel experiments using the above CFD package would be carried out. To study the aerodynamic influence of vehicle segments are considered as threebox form passenger car model (Mercedes). As this model provided with the extremities in the design of vehicle category in summarizes these results in a broader sense to understand the aerodynamics of such profile. A wind tunnel experiments consists of physically testing the model in a simulated environment. It is a closed environment in which air is blown across the model at a constant velocity. As the air passes over the vehicle, it follows the streamlines pattern present on the body. This causes a change in pressure and velocity characteristics across the model. By studying the pressure and velocity variations across the model, the drag and lift coefficient could be predicted.
{"title":"External Flow Analysis over Three-box form (Mercedes model) Using CFD","authors":"A. Abdullah","doi":"10.9790/1684-1404011621","DOIUrl":"https://doi.org/10.9790/1684-1404011621","url":null,"abstract":"Computational fluid dynamic software ANSYS Fluent 15.0 is used to predict the physical parameters on the external surface of a vehicle. The simulation of the wind tunnel experiments using the above CFD package would be carried out. To study the aerodynamic influence of vehicle segments are considered as threebox form passenger car model (Mercedes). As this model provided with the extremities in the design of vehicle category in summarizes these results in a broader sense to understand the aerodynamics of such profile. A wind tunnel experiments consists of physically testing the model in a simulated environment. It is a closed environment in which air is blown across the model at a constant velocity. As the air passes over the vehicle, it follows the streamlines pattern present on the body. This causes a change in pressure and velocity characteristics across the model. By studying the pressure and velocity variations across the model, the drag and lift coefficient could be predicted.","PeriodicalId":14565,"journal":{"name":"IOSR Journal of Mechanical and Civil Engineering","volume":"44 1","pages":"16-21"},"PeriodicalIF":0.0,"publicationDate":"2017-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91394003","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}
M. Mamun, S. A. Khuky, Annesha Das Hasi, N. Ferdous
Bangladesh is a country where the river bearing soft sediments are covering all over. Moreover, natural hazards strike this country almost every year. So, civil engineering constructions should take consideration of these aspects in the planning stage. This article attempts evaluation of soil condition of Bangladesh and flood hazard assessment regarding road network of Bangladesh. Two maps were engendered to serve the purpose, one showing soil condition and other illustrating flood vulnerability. It has been revealed from the study that some roads in Bangladesh are lying on soft soil with less engineering value, also some are in areas which are vulnerable for being affected by flood hazard. It is expected that this study would be helpful for planners, decision makers, and civil engineers for constructing endurable network in Bangladesh and thus contribute towards sustainable development of the country.
{"title":"An Evaluation OfSoil Condition And Flood Risk For Road Network Of Bangladesh—Compiled From Engineering Soil Maps And Digital Elevation Model","authors":"M. Mamun, S. A. Khuky, Annesha Das Hasi, N. Ferdous","doi":"10.9790/1684-1404025361","DOIUrl":"https://doi.org/10.9790/1684-1404025361","url":null,"abstract":"Bangladesh is a country where the river bearing soft sediments are covering all over. Moreover, natural hazards strike this country almost every year. So, civil engineering constructions should take consideration of these aspects in the planning stage. This article attempts evaluation of soil condition of Bangladesh and flood hazard assessment regarding road network of Bangladesh. Two maps were engendered to serve the purpose, one showing soil condition and other illustrating flood vulnerability. It has been revealed from the study that some roads in Bangladesh are lying on soft soil with less engineering value, also some are in areas which are vulnerable for being affected by flood hazard. It is expected that this study would be helpful for planners, decision makers, and civil engineers for constructing endurable network in Bangladesh and thus contribute towards sustainable development of the country.","PeriodicalId":14565,"journal":{"name":"IOSR Journal of Mechanical and Civil Engineering","volume":"67 1","pages":"53-61"},"PeriodicalIF":0.0,"publicationDate":"2017-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73387617","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}
This discussion paper presents an overview of current understanding of ground water and surface water in terms of quantity and quality, their interaction and connectivity. In the past, groundwater and surface water were managed as if they are separate entities. This led to double accounting by water managers resulting to unrealistic water budgets and general poor management structure of this natural resource. The connectivity and interactions of ground water and surface water were analyzed and found to change with different topography. Understanding the interaction of groundwater and surface water is essential to water managers and water scientists towards provision of cost effective and sustainable water management structure.
{"title":"Ground Water and Surface Water as One Resource: Connectivity and Interaction","authors":"C. Ezugwu, S. Apeh","doi":"10.9790/1684-1403075459","DOIUrl":"https://doi.org/10.9790/1684-1403075459","url":null,"abstract":"This discussion paper presents an overview of current understanding of ground water and surface water in terms of quantity and quality, their interaction and connectivity. In the past, groundwater and surface water were managed as if they are separate entities. This led to double accounting by water managers resulting to unrealistic water budgets and general poor management structure of this natural resource. The connectivity and interactions of ground water and surface water were analyzed and found to change with different topography. Understanding the interaction of groundwater and surface water is essential to water managers and water scientists towards provision of cost effective and sustainable water management structure.","PeriodicalId":14565,"journal":{"name":"IOSR Journal of Mechanical and Civil Engineering","volume":"1 1","pages":"54-59"},"PeriodicalIF":0.0,"publicationDate":"2017-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85548909","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}
Computational fluid dynamic software ANSYS Fluent 15.0 is used to predict the physical parameters on the external surface of a vehicle. The simulation of the wind tunnel experiments using the above CFD package would be carried out. To study the aerodynamic influence of vehicle segments are considered as twobox form passenger car model (TOYOTA-Land Cruiser). As this model provided with the extremities in the design of vehicle category in summarizes these results in a broader sense to understand the aerodynamics of such profile. A wind tunnel experiments consists of physically testing the model in a simulated environment. It is a closed environment in which air is blown across the model at a constant velocity. As the air passes over the vehicle, it follows the streamlines pattern present on the body. This causes a change in pressure and velocity characteristics across the model. By studying the pressure and velocity variations across the model, the drag and lift coefficient could be predicted.
{"title":"External Flow Analysis over Tow-box form (TOYOTA-Land Cruiser model) Using CFD","authors":"A. Kacem","doi":"10.9790/1684-1404011015","DOIUrl":"https://doi.org/10.9790/1684-1404011015","url":null,"abstract":"Computational fluid dynamic software ANSYS Fluent 15.0 is used to predict the physical parameters on the external surface of a vehicle. The simulation of the wind tunnel experiments using the above CFD package would be carried out. To study the aerodynamic influence of vehicle segments are considered as twobox form passenger car model (TOYOTA-Land Cruiser). As this model provided with the extremities in the design of vehicle category in summarizes these results in a broader sense to understand the aerodynamics of such profile. A wind tunnel experiments consists of physically testing the model in a simulated environment. It is a closed environment in which air is blown across the model at a constant velocity. As the air passes over the vehicle, it follows the streamlines pattern present on the body. This causes a change in pressure and velocity characteristics across the model. By studying the pressure and velocity variations across the model, the drag and lift coefficient could be predicted.","PeriodicalId":14565,"journal":{"name":"IOSR Journal of Mechanical and Civil Engineering","volume":"70 1","pages":"10-15"},"PeriodicalIF":0.0,"publicationDate":"2017-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86203846","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}
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