Abstract The creep of fine soils is due to the viscous properties of the assembly of mineral particles accompanied of adsorbed water which forms intergranular skeleton. It is evident during the secondary consolidation that the effective stresses are constant, the deformation extends over time. Rock fill dams with clay sealing cores deformed during exploitation. During commissioning of the core, clay undergoes. Creep is a major characteristic of the nonlinear behaviour of materials, in which the material continues to become deformed under a constant load. It can cause considerable deformations of the works (two to three times instantaneous strain in three years). This study presents a prediction of the creep behavior of a clay core in a rock dam subjected to constant hydrostatic loading for 20000 h and describes a procedure for modeling the primary and secondary creep law simulation using ANSYS software APDL In this aims, we have applied the finite element method based on a model shown in equation 8 called (Strain Hardening Model) in order to simulate a creep behavior of clay core.
{"title":"Creep Behavior of the Clay Cores at the Bougdoura Dam Using Ansys Software","authors":"K. Ghouilem, D. Atlaoui, S. Merakeb","doi":"10.2478/jaes-2023-0024","DOIUrl":"https://doi.org/10.2478/jaes-2023-0024","url":null,"abstract":"Abstract The creep of fine soils is due to the viscous properties of the assembly of mineral particles accompanied of adsorbed water which forms intergranular skeleton. It is evident during the secondary consolidation that the effective stresses are constant, the deformation extends over time. Rock fill dams with clay sealing cores deformed during exploitation. During commissioning of the core, clay undergoes. Creep is a major characteristic of the nonlinear behaviour of materials, in which the material continues to become deformed under a constant load. It can cause considerable deformations of the works (two to three times instantaneous strain in three years). This study presents a prediction of the creep behavior of a clay core in a rock dam subjected to constant hydrostatic loading for 20000 h and describes a procedure for modeling the primary and secondary creep law simulation using ANSYS software APDL In this aims, we have applied the finite element method based on a model shown in equation 8 called (Strain Hardening Model) in order to simulate a creep behavior of clay core.","PeriodicalId":44808,"journal":{"name":"Journal of Applied Engineering Sciences","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138616040","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}
Abstract Sustainable pavement is the need of the hour using the mechanistic and robust pavement design approach, eliminating empiricism in the present IRC SP 72-2015 design guidelines, if any. Giroud and Han (2004) (GH) approach has confirmed existing empiricism in IRC SP 72-2015 design guidelines and permits the use of locally available material, thus saving transportation costs and reducing air pollution. IRC SP 72 – 2015 recommends design thickness only for the unreinforced condition in gravel roads for the maximum rut of 50mm. This paper presents the comparative study of an unreinforced and geotextile-reinforced gravel road design for Indian conditions with the rut as a vital design parameter using the GH method for subgrade classes with 2% to 5% CBR and the maximum traffic count of 100,000. The proposed unique equation provides Allowable Rut Depth (ARD) based aggregate thickness for 10,000 to 100,000 traffic count apart from simplifying the complex procedure of the GH approach for IRC SP 72-2015 data. The unique equation’s result reveals an increase of 22.65% in aggregate thickness is attributed to the increase in ARD of 30mm using locally available poor aggregates. This confirms the practical relevance of ARD in pavement design that may help in planning maintenance programs and road rehabilitation strategies. The results obtained from the unique equation match 85 to 100% with GH results. Saving up to 36.5% to 76.9% of costly aggregate is found in the case of geotextile-reinforced gravel roads in Indian conditions.
{"title":"Design of Geotextile Reinforced Gravel Roads Using Giroud and Han Approach for Indian Condition","authors":"Jayalakshmi Dheiveekan, S.S. Bhosale","doi":"10.2478/jaes-2023-0022","DOIUrl":"https://doi.org/10.2478/jaes-2023-0022","url":null,"abstract":"Abstract Sustainable pavement is the need of the hour using the mechanistic and robust pavement design approach, eliminating empiricism in the present IRC SP 72-2015 design guidelines, if any. Giroud and Han (2004) (GH) approach has confirmed existing empiricism in IRC SP 72-2015 design guidelines and permits the use of locally available material, thus saving transportation costs and reducing air pollution. IRC SP 72 – 2015 recommends design thickness only for the unreinforced condition in gravel roads for the maximum rut of 50mm. This paper presents the comparative study of an unreinforced and geotextile-reinforced gravel road design for Indian conditions with the rut as a vital design parameter using the GH method for subgrade classes with 2% to 5% CBR and the maximum traffic count of 100,000. The proposed unique equation provides Allowable Rut Depth (ARD) based aggregate thickness for 10,000 to 100,000 traffic count apart from simplifying the complex procedure of the GH approach for IRC SP 72-2015 data. The unique equation’s result reveals an increase of 22.65% in aggregate thickness is attributed to the increase in ARD of 30mm using locally available poor aggregates. This confirms the practical relevance of ARD in pavement design that may help in planning maintenance programs and road rehabilitation strategies. The results obtained from the unique equation match 85 to 100% with GH results. Saving up to 36.5% to 76.9% of costly aggregate is found in the case of geotextile-reinforced gravel roads in Indian conditions.","PeriodicalId":44808,"journal":{"name":"Journal of Applied Engineering Sciences","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138621769","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}
Abstract Given the escalating shortage of natural resources, the excessive demand for granular materials, and the challenges associated with identifying novel quarry sites, numerous research inquiries have been undertaken to explore the feasibility of reutilizing waste materials and manufacturing by-products in lieu of conventional resources that are progressively diminishing. This research seeks to mitigate construction expenses while simultaneously promoting environmental preservation. The purpose of this experiment study is to examine the impact of waste marble powder used as a cement substitute on the properties of cellular concrete like drying shrinkage, sorptivity and micro-structural using optical microscope (OPM), and Fourier transform infrared spectroscopy (FTIR) so that it can be reused in the production of cellular concrete. More extensive and detailed research is needed. In order to accomplish this goal, three distinct varieties of cellular concrete are produced composed on sea sand, waste marble sand and river sand, with various substitution rates of waste marble powder (WMP) (0%, 10%, 15% and 20%), and different ratios aluminum powder (0 %; 0.25%; 0.50%; 0.75% and 1%). The findings revealed that: (i) The drying shrinkage decreases with increasing WMP dosage, but it increases as a function of the aluminum content. (ii) As the dosage of WMP and the amount of aluminum increase, the sorptivity of the cellular concrete decreases. (iii) Specimens that containing WMP enhanced the cellular concrete matrix’s characteristics, as seen by Optical microscope images. (iv) The FTIR results clearly indicate a shift in peaks when WMP and aluminum powder are present, in comparison to the control mix. (v) Overall, the replacement of cement with appropriate WMP has a positive impact on both the manufacturing process of cellular concrete and the environment.
{"title":"Drying Shrinkage, Sorptivity and Micro-Structural Characteristics of Cellular Concrete Containing Waste Marble Powder as Cementitious Materials","authors":"Moufida Bourema, I. Goual, A. Ferhat","doi":"10.2478/jaes-2023-0021","DOIUrl":"https://doi.org/10.2478/jaes-2023-0021","url":null,"abstract":"Abstract Given the escalating shortage of natural resources, the excessive demand for granular materials, and the challenges associated with identifying novel quarry sites, numerous research inquiries have been undertaken to explore the feasibility of reutilizing waste materials and manufacturing by-products in lieu of conventional resources that are progressively diminishing. This research seeks to mitigate construction expenses while simultaneously promoting environmental preservation. The purpose of this experiment study is to examine the impact of waste marble powder used as a cement substitute on the properties of cellular concrete like drying shrinkage, sorptivity and micro-structural using optical microscope (OPM), and Fourier transform infrared spectroscopy (FTIR) so that it can be reused in the production of cellular concrete. More extensive and detailed research is needed. In order to accomplish this goal, three distinct varieties of cellular concrete are produced composed on sea sand, waste marble sand and river sand, with various substitution rates of waste marble powder (WMP) (0%, 10%, 15% and 20%), and different ratios aluminum powder (0 %; 0.25%; 0.50%; 0.75% and 1%). The findings revealed that: (i) The drying shrinkage decreases with increasing WMP dosage, but it increases as a function of the aluminum content. (ii) As the dosage of WMP and the amount of aluminum increase, the sorptivity of the cellular concrete decreases. (iii) Specimens that containing WMP enhanced the cellular concrete matrix’s characteristics, as seen by Optical microscope images. (iv) The FTIR results clearly indicate a shift in peaks when WMP and aluminum powder are present, in comparison to the control mix. (v) Overall, the replacement of cement with appropriate WMP has a positive impact on both the manufacturing process of cellular concrete and the environment.","PeriodicalId":44808,"journal":{"name":"Journal of Applied Engineering Sciences","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138627181","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}
Abstract In order to utilize waste materials as building component, waste of thin plastics wrap and waste engine oil without and with rice husk ash as filler can be used for producing Plastic Wall Block (PWB). The objective was to evaluate the PWB engineering properties. The waste plastic wrap was shredded or cut off to sizes about 5-10mm. The waste engine oil without or with rice husk ash were heated at 200°C, then the shredded plastic poured into hot oil and evenly mixed. The mixture was casted in a metal mould and compacted at temperature of 125-110°C using a Marshall hummer for one blow to give even and flat surface shape then cooled down to form sample with average size of 100x100x80mm. It was obtained that the soaked compressive strength can exceed 25kg/cm2 which is the minimum value targeted, with initial rate of suction range about 0.0149-0.1012 kg/m2.minute; porosity in a range of 0.62-1.48 %, and water absorption of 0.0481-2.2185 %.
{"title":"Plastic Wall Block from Thin Waste Plastics Wrap and Waste Engine Oil Without and With Filling Material","authors":"I. Thanaya, I.M. Swasnawa, I.G.N.A.K. Putra","doi":"10.2478/jaes-2023-0035","DOIUrl":"https://doi.org/10.2478/jaes-2023-0035","url":null,"abstract":"Abstract In order to utilize waste materials as building component, waste of thin plastics wrap and waste engine oil without and with rice husk ash as filler can be used for producing Plastic Wall Block (PWB). The objective was to evaluate the PWB engineering properties. The waste plastic wrap was shredded or cut off to sizes about 5-10mm. The waste engine oil without or with rice husk ash were heated at 200°C, then the shredded plastic poured into hot oil and evenly mixed. The mixture was casted in a metal mould and compacted at temperature of 125-110°C using a Marshall hummer for one blow to give even and flat surface shape then cooled down to form sample with average size of 100x100x80mm. It was obtained that the soaked compressive strength can exceed 25kg/cm2 which is the minimum value targeted, with initial rate of suction range about 0.0149-0.1012 kg/m2.minute; porosity in a range of 0.62-1.48 %, and water absorption of 0.0481-2.2185 %.","PeriodicalId":44808,"journal":{"name":"Journal of Applied Engineering Sciences","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138613972","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}
U. Siddique, M. Jawad, Asif Ali, S. M. Cheema, M. Adil Sultan, M. Jamshaid Akhtar
Abstract This article discusses a variety of more recent alternatives to Portland cement (OPC) that can lower energy consumption and greenhouse gas emissions. Some of these new binders can be made utilizing fuels and low-grade industrial waste. Only after thorough examination of various physico-mechanical, microstructural, and durability properties can the practical viability of these alternative binders be substantiated .In this review paper seven important alternative cementitious binder systems i.e. Supplemental cementitious in place of OPC in some cases, Industrial By-Products, Alternative cements, Concrete Made Using Garbage as Aggregate, Carbona table Calcium Silicate Cement, Cements With a Calcium Hydro silicate Base, Eggshell waste for sustainable construction materials are discussed. It was deduced that all of the more recent cementitious binders could be created utilizing industrial wastes such as low-grade limestone or clay, fly ash, and slags. This would result in the achievement of the desired physico-mechanical and durability properties, as well as a decrease in cost and energy consumption of between 20 and 58 percent. In addition, the creation of the aforementioned alternative binder results in a reduction of greenhouse gases that is anywhere from 15–55%.
{"title":"Green Cement Valuation: An Optimistic Approach to Carbon Dioxide Reduction","authors":"U. Siddique, M. Jawad, Asif Ali, S. M. Cheema, M. Adil Sultan, M. Jamshaid Akhtar","doi":"10.2478/jaes-2023-0033","DOIUrl":"https://doi.org/10.2478/jaes-2023-0033","url":null,"abstract":"Abstract This article discusses a variety of more recent alternatives to Portland cement (OPC) that can lower energy consumption and greenhouse gas emissions. Some of these new binders can be made utilizing fuels and low-grade industrial waste. Only after thorough examination of various physico-mechanical, microstructural, and durability properties can the practical viability of these alternative binders be substantiated .In this review paper seven important alternative cementitious binder systems i.e. Supplemental cementitious in place of OPC in some cases, Industrial By-Products, Alternative cements, Concrete Made Using Garbage as Aggregate, Carbona table Calcium Silicate Cement, Cements With a Calcium Hydro silicate Base, Eggshell waste for sustainable construction materials are discussed. It was deduced that all of the more recent cementitious binders could be created utilizing industrial wastes such as low-grade limestone or clay, fly ash, and slags. This would result in the achievement of the desired physico-mechanical and durability properties, as well as a decrease in cost and energy consumption of between 20 and 58 percent. In addition, the creation of the aforementioned alternative binder results in a reduction of greenhouse gases that is anywhere from 15–55%.","PeriodicalId":44808,"journal":{"name":"Journal of Applied Engineering Sciences","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138621116","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}
Abstract The rising levels of air pollution in the industrial environment necessitate its monitoring near the sources. The green wall around the industries is a novel and popular to mitigate the impact of Particulate Matter (PM). Such industrial mitigation cannot be monitored through a limited quantity AQ monitoring station at ground level. This paper demonstrates the application of drone aided particulate matter monitoring system to measure the above-ground level PM levels. The drone-aided AQ monitoring system was employed near the thermal power plant to calculate the attenuation factor potential due to the plantation of a green bamboo belt. The wind rose was plotted to understand the wind pattern and dispersion direction of the PM. The dust suppression due to the green wall of the bamboo is calculated using a drone-enabled PM sensor module. The PM (Particulate Matter) data at the ground level was 39 % low compared to the upper height. The PM concentration was significantly high at the height of 30 m Above Ground Level (AGL). The bamboo plant plays a crucial role in dust suppression. The overall results pointed out that the calibrated, lightweight portable drone-aided sensor monitoring system can be reliable for monitoring source-specific industries.
{"title":"Drone-Aided Particulate Monitoring System for Industrial Complex to Analyze the Dust Suppressing Capacity","authors":"P. Kokate, A. Middey, S. Sadistap","doi":"10.2478/jaes-2023-0030","DOIUrl":"https://doi.org/10.2478/jaes-2023-0030","url":null,"abstract":"Abstract The rising levels of air pollution in the industrial environment necessitate its monitoring near the sources. The green wall around the industries is a novel and popular to mitigate the impact of Particulate Matter (PM). Such industrial mitigation cannot be monitored through a limited quantity AQ monitoring station at ground level. This paper demonstrates the application of drone aided particulate matter monitoring system to measure the above-ground level PM levels. The drone-aided AQ monitoring system was employed near the thermal power plant to calculate the attenuation factor potential due to the plantation of a green bamboo belt. The wind rose was plotted to understand the wind pattern and dispersion direction of the PM. The dust suppression due to the green wall of the bamboo is calculated using a drone-enabled PM sensor module. The PM (Particulate Matter) data at the ground level was 39 % low compared to the upper height. The PM concentration was significantly high at the height of 30 m Above Ground Level (AGL). The bamboo plant plays a crucial role in dust suppression. The overall results pointed out that the calibrated, lightweight portable drone-aided sensor monitoring system can be reliable for monitoring source-specific industries.","PeriodicalId":44808,"journal":{"name":"Journal of Applied Engineering Sciences","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138627401","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}
Abstract This article studies the behavior of concrete beams reinforced with metal fibers (chips) randomly arranged in concrete, to improve ductility and bending stiffness and limit crack openings. These fibers come from machining waste from steel parts. The fibers are characterized for mechanical resistance and tearing. Three series of tests were carried out for languor respectively L = 4 cm, L = 5 cm and L = 6 cm. Bending tests (three-point bending) are carried out on prismatic specimens of dimensions [10x20x120] cm3. Compression tests are carried out on cylinders with a diameter of Ø16 cm and a height of H32 cm in order to determine the mechanical properties of the concrete used. The composition of the concrete is determined by the experimental method known as “Dreux-Gorisse”. Two fiber contents are retained for this study (W= 0.6% and W= 0.8%) and a BT control concrete (W=0%) with W: fiber contents in the concrete, of the same composition as the matrix is developed for serve as a reference. The confrontation and comparison of the different results obtained show that the fibers with languor L=6 cm confer significant ductility to the material after cracking of the concrete, better than the other languor’s (L= 4 cm and 5 cm) with numbers of undulations (spirals) n=3.5and 6. Also, the fibers used limit bending cracks and improve strength and rigidity.
{"title":"Effect of Chipped Fiber Languor on the Bending Behavior of Concrete Beam Elements","authors":"D. Atlaoui, K. Ghouilem","doi":"10.2478/jaes-2023-0020","DOIUrl":"https://doi.org/10.2478/jaes-2023-0020","url":null,"abstract":"Abstract This article studies the behavior of concrete beams reinforced with metal fibers (chips) randomly arranged in concrete, to improve ductility and bending stiffness and limit crack openings. These fibers come from machining waste from steel parts. The fibers are characterized for mechanical resistance and tearing. Three series of tests were carried out for languor respectively L = 4 cm, L = 5 cm and L = 6 cm. Bending tests (three-point bending) are carried out on prismatic specimens of dimensions [10x20x120] cm3. Compression tests are carried out on cylinders with a diameter of Ø16 cm and a height of H32 cm in order to determine the mechanical properties of the concrete used. The composition of the concrete is determined by the experimental method known as “Dreux-Gorisse”. Two fiber contents are retained for this study (W= 0.6% and W= 0.8%) and a BT control concrete (W=0%) with W: fiber contents in the concrete, of the same composition as the matrix is developed for serve as a reference. The confrontation and comparison of the different results obtained show that the fibers with languor L=6 cm confer significant ductility to the material after cracking of the concrete, better than the other languor’s (L= 4 cm and 5 cm) with numbers of undulations (spirals) n=3.5and 6. Also, the fibers used limit bending cracks and improve strength and rigidity.","PeriodicalId":44808,"journal":{"name":"Journal of Applied Engineering Sciences","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138609688","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}
Y. Abbas, R. Djebien, N. Toubal Seghir, O. Benaimeche
Abstract This study investigates the impact of waste additives on the behaviour of high-performance concrete and its environmental implications, with a specific focus on resource conservation. The research objectives were realised through the preparation of high-performance concrete specimens incorporating industrial waste materials and marble powder as partial replacements for cement and fine aggregates, respectively. Silica fume and ground blast furnace slag were introduced as substitutes for 8% of the cement’s weight. Powdered marble was volumetrically substituted at levels of 5%, 10%, and 15% of the fine aggregates. The physical and mechanical properties of both fresh and cured concrete specimens were evaluated at different ages, encompassing parameters such as density, compressive strength, impulse velocity, water absorption, and durability. The findings demonstrated that high-performance concrete formulated with silica fume and ground blast furnace slag exhibited superior properties compared to compositions relying exclusively on Portland cement. Furthermore, the inclusion of marble powder as an alternative building material constituent in high-performance concrete resulted in increased efficiency and improved resistance against chemical acid attacks. Significantly, this approach contributes to reduce aggregate demands, environmental preservation, and the production of environmentally sustainable concrete.
{"title":"Enhancing Mechanical Behaviour and Durability of High Performance Concrete with Silica Fume, Ground Blast Furnace Slag, and Marble Powder","authors":"Y. Abbas, R. Djebien, N. Toubal Seghir, O. Benaimeche","doi":"10.2478/jaes-2023-0018","DOIUrl":"https://doi.org/10.2478/jaes-2023-0018","url":null,"abstract":"Abstract This study investigates the impact of waste additives on the behaviour of high-performance concrete and its environmental implications, with a specific focus on resource conservation. The research objectives were realised through the preparation of high-performance concrete specimens incorporating industrial waste materials and marble powder as partial replacements for cement and fine aggregates, respectively. Silica fume and ground blast furnace slag were introduced as substitutes for 8% of the cement’s weight. Powdered marble was volumetrically substituted at levels of 5%, 10%, and 15% of the fine aggregates. The physical and mechanical properties of both fresh and cured concrete specimens were evaluated at different ages, encompassing parameters such as density, compressive strength, impulse velocity, water absorption, and durability. The findings demonstrated that high-performance concrete formulated with silica fume and ground blast furnace slag exhibited superior properties compared to compositions relying exclusively on Portland cement. Furthermore, the inclusion of marble powder as an alternative building material constituent in high-performance concrete resulted in increased efficiency and improved resistance against chemical acid attacks. Significantly, this approach contributes to reduce aggregate demands, environmental preservation, and the production of environmentally sustainable concrete.","PeriodicalId":44808,"journal":{"name":"Journal of Applied Engineering Sciences","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138610499","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}
Abstract The present paper focuses on a study model of a trithermal absorption machine, operating at H2O/LiBr couple, powered by a planar solar collector. Therefore, the mathematical model is based on the principles and laws of thermodynamics as well as the heat and mass transfer equations, expressed for the refrigeration cycle. In fact, the results of the complete numerical simulation of the machine, developed within the framework of this study, allow predicting the performances of this type of installation according to the various parameters as well as the operating temperatures and the flow rate in the absorber.
{"title":"Simulation and Analysis of a Solar Cooling System","authors":"Hafidha Maouel, K. Mohammedi","doi":"10.2478/jaes-2023-0031","DOIUrl":"https://doi.org/10.2478/jaes-2023-0031","url":null,"abstract":"Abstract The present paper focuses on a study model of a trithermal absorption machine, operating at H2O/LiBr couple, powered by a planar solar collector. Therefore, the mathematical model is based on the principles and laws of thermodynamics as well as the heat and mass transfer equations, expressed for the refrigeration cycle. In fact, the results of the complete numerical simulation of the machine, developed within the framework of this study, allow predicting the performances of this type of installation according to the various parameters as well as the operating temperatures and the flow rate in the absorber.","PeriodicalId":44808,"journal":{"name":"Journal of Applied Engineering Sciences","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138609462","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}
V. Marusceac, A. Danciu, Mădălina Ciotlăuș, M. Dragomir
Abstract This paper aims to study the on-going problem of traffic generated noise pollution, focusing on the influence of speed breakers on specific areas of the noise spectrum. We studied different types of speed breakers around the metropolitan area of Cluj-Napoca, measuring a sound spectrum from 20 Hz to 20 kHz. Speed breakers have an extensive use all over the world as safety measures near parks, schools, residential areas, but the question to answer is whether they also contribute to the increase in noise pollution and to what measure this contribution is. The study considers the different types of speed breakers used in the metropolitan area and the degree of usage the speed breakers have.
{"title":"Influence of Speed Brakers on Traffic Generated Noise Levels","authors":"V. Marusceac, A. Danciu, Mădălina Ciotlăuș, M. Dragomir","doi":"10.2478/jaes-2023-0032","DOIUrl":"https://doi.org/10.2478/jaes-2023-0032","url":null,"abstract":"Abstract This paper aims to study the on-going problem of traffic generated noise pollution, focusing on the influence of speed breakers on specific areas of the noise spectrum. We studied different types of speed breakers around the metropolitan area of Cluj-Napoca, measuring a sound spectrum from 20 Hz to 20 kHz. Speed breakers have an extensive use all over the world as safety measures near parks, schools, residential areas, but the question to answer is whether they also contribute to the increase in noise pollution and to what measure this contribution is. The study considers the different types of speed breakers used in the metropolitan area and the degree of usage the speed breakers have.","PeriodicalId":44808,"journal":{"name":"Journal of Applied Engineering Sciences","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138617768","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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