Pub Date : 2024-02-29DOI: 10.22201/icat.24486736e.2024.22.1.2215
A. Zuhri, A. E. Pramono, I. Setyadi, A. Maksum, N. Indayaningsih
This experimental research aimed to develop a conductive polymer composite (CPC) material for electromechanical devices. The composite was made by incorporating conductive micro carbon derived from rice husks into a Linear Low-Density Polyethylene (LLDPE) polymer matrix using hot compaction. Variations of filler composition were used, with carbon loading of 50%, 45%, and 40%, and mesh sizes of #150, #200, and #250. The experimental results showed that particle size variations did not significantly affect composite density, but higher mesh selection improved filler dispersion within the matrix, resulting in higher electrical conductivity values. The optimal conductivity value of 9.43E-04 S/cm was achieved with a micro-carbon composition of 50% loading. However, decreasing micro carbon loading had a more significant impact on reducing electrical conductivity values.
{"title":"Effect of microcarbon particle size and dispersion on the electrical conductivity of LLDPE-carbon composite","authors":"A. Zuhri, A. E. Pramono, I. Setyadi, A. Maksum, N. Indayaningsih","doi":"10.22201/icat.24486736e.2024.22.1.2215","DOIUrl":"https://doi.org/10.22201/icat.24486736e.2024.22.1.2215","url":null,"abstract":"This experimental research aimed to develop a conductive polymer composite (CPC) material for electromechanical devices. The composite was made by incorporating conductive micro carbon derived from rice husks into a Linear Low-Density Polyethylene (LLDPE) polymer matrix using hot compaction. Variations of filler composition were used, with carbon loading of 50%, 45%, and 40%, and mesh sizes of #150, #200, and #250. The experimental results showed that particle size variations did not significantly affect composite density, but higher mesh selection improved filler dispersion within the matrix, resulting in higher electrical conductivity values. The optimal conductivity value of 9.43E-04 S/cm was achieved with a micro-carbon composition of 50% loading. However, decreasing micro carbon loading had a more significant impact on reducing electrical conductivity values.","PeriodicalId":15073,"journal":{"name":"Journal of Applied Research and Technology","volume":"85 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140410411","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}
Pub Date : 2024-02-29DOI: 10.22201/icat.24486736e.2024.22.1.2131
S. Muñoz Pérez, M. E. Rivera Segura, Y. A. Alejandria Bustamante, L. V. Villena Zapata
In this research, the effects produced by the combination of coffee husk ash and polypropylene fibers in the production of concrete were studied in order to evaluate the mechanical properties and determine an optimum design combination. Two standard concrete mix designs of f'c= 210 and 280 kg/cm2 were developed, and experimental treatments of standard concrete were designed by adding coffee husk ash at 5%, 10% and 15% combined with polypropylene fibers at 1%, 2.5 % and 5%. The results showed that the resistance differs in 8.94% and 4.11% in compression, 8.55% and 15.03% in traction, 10.89% and 8.96% in bending and increases the modulus of elasticity in 5.66% and 14.15% with respect to the standard designs f'c= 210 and 280 kg/cm2. It is concluded that the mechanical characteristics are relatively lower compared to the standard mix designs.
{"title":"Study of the combined effect of coffee husk ash and polypropylene fibres on the mechanical properties of concrete","authors":"S. Muñoz Pérez, M. E. Rivera Segura, Y. A. Alejandria Bustamante, L. V. Villena Zapata","doi":"10.22201/icat.24486736e.2024.22.1.2131","DOIUrl":"https://doi.org/10.22201/icat.24486736e.2024.22.1.2131","url":null,"abstract":"In this research, the effects produced by the combination of coffee husk ash and polypropylene fibers in the production of concrete were studied in order to evaluate the mechanical properties and determine an optimum design combination. Two standard concrete mix designs of f'c= 210 and 280 kg/cm2 were developed, and experimental treatments of standard concrete were designed by adding coffee husk ash at 5%, 10% and 15% combined with polypropylene fibers at 1%, 2.5 % and 5%. The results showed that the resistance differs in 8.94% and 4.11% in compression, 8.55% and 15.03% in traction, 10.89% and 8.96% in bending and increases the modulus of elasticity in 5.66% and 14.15% with respect to the standard designs f'c= 210 and 280 kg/cm2. It is concluded that the mechanical characteristics are relatively lower compared to the standard mix designs.","PeriodicalId":15073,"journal":{"name":"Journal of Applied Research and Technology","volume":"24 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140411630","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}
Pub Date : 2024-02-29DOI: 10.22201/icat.24486736e.2024.22.1.2112
A. Nakamura, H. Sato, Y. Sato, K. Murakami
Separation of bentonite from wastewater is challenging because bentonite, is highly dispersible in water. Using cationic polymer flocculants has a high flocculation effect on bentonite. However, the flocculation mechanism is unclear. In this study, flocculation, filtration, and bentonite adsorption behavior are investigated using cetyltrimethylammonium bromide (CTAB) as cationic small molecule; subsequently, the flocculation mechanism of bentonite is explored. The flocculation effect increases and the filtration time is reduced with increasing CTAB concentration. In particular, when more than 1500 ppm of CTAB is used, the filtration time is reduced to 2–3 min. Bentonite forms secondary flocculates after the formation of primary flocculates with increasing CTAB concentration. Additionally, the adsorption behavior reveals that CTAB is inserted between the layers, and it is excessively adsorbed on the bentonite surface. The increase CTAB concentration was effective in improving the shortening the filtration time owing to the formation of large bentonite flocculates.
{"title":"Effect of cetyltrimethylammonium bromide on flocculation and filtration of bentonite suspensions","authors":"A. Nakamura, H. Sato, Y. Sato, K. Murakami","doi":"10.22201/icat.24486736e.2024.22.1.2112","DOIUrl":"https://doi.org/10.22201/icat.24486736e.2024.22.1.2112","url":null,"abstract":"Separation of bentonite from wastewater is challenging because bentonite, is highly dispersible in water. Using cationic polymer flocculants has a high flocculation effect on bentonite. However, the flocculation mechanism is unclear. In this study, flocculation, filtration, and bentonite adsorption behavior are investigated using cetyltrimethylammonium bromide (CTAB) as cationic small molecule; subsequently, the flocculation mechanism of bentonite is explored. The flocculation effect increases and the filtration time is reduced with increasing CTAB concentration. In particular, when more than 1500 ppm of CTAB is used, the filtration time is reduced to 2–3 min. Bentonite forms secondary flocculates after the formation of primary flocculates with increasing CTAB concentration. Additionally, the adsorption behavior reveals that CTAB is inserted between the layers, and it is excessively adsorbed on the bentonite surface. The increase CTAB concentration was effective in improving the shortening the filtration time owing to the formation of large bentonite flocculates.","PeriodicalId":15073,"journal":{"name":"Journal of Applied Research and Technology","volume":"625 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140416901","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}
Pub Date : 2024-02-29DOI: 10.22201/icat.24486736e.2024.22.1.2091
Akhyar, C. A. Sary
This study was conducted in the geothermal potential area of Mount Seulawah, Aceh province. Study was conducted using remote sensing methods in order to estimate and map the land surface temperature (LST). Data used in this study is Landsat 8 OLI and TIRS. Methods used in this study were split-window algorithm (SWA) to obtain the LST through NDVI analysis and landcover classification, and image enhancement to obtain the lineament density through visual interpretation referring to the results of band ratio and filter techniques. The results of the NDVI analysis show that the study area has a value in the range of -0.57 – 0.97. The results of the LST analysis show that the surface temperature in the area has a value in the range of 21.32 - 32.88 oC. Areas that have high LST values can be estimated as areas that have anomalies. Based on the results of the lineament density analysis, the higher density value in an area can indicate the better permeability where geothermal manifestations come out. The direction of the lineaments that control the study area is dominated by the northwest-southeast in accordance with the direction of the main stress, namely the Seulimum fault and the Aceh fault which also has a northwest-southeast direction. The overall results show that the Seulawah geothermal area is quite potential to be developed for the sustainable natural resource.
{"title":"Identification of geothermal potential zone associated with land surface temperature derived from Landsat 8 data using split-window algorithm","authors":"Akhyar, C. A. Sary","doi":"10.22201/icat.24486736e.2024.22.1.2091","DOIUrl":"https://doi.org/10.22201/icat.24486736e.2024.22.1.2091","url":null,"abstract":"This study was conducted in the geothermal potential area of Mount Seulawah, Aceh province. Study was conducted using remote sensing methods in order to estimate and map the land surface temperature (LST). Data used in this study is Landsat 8 OLI and TIRS. Methods used in this study were split-window algorithm (SWA) to obtain the LST through NDVI analysis and landcover classification, and image enhancement to obtain the lineament density through visual interpretation referring to the results of band ratio and filter techniques. The results of the NDVI analysis show that the study area has a value in the range of -0.57 – 0.97. The results of the LST analysis show that the surface temperature in the area has a value in the range of 21.32 - 32.88 oC. Areas that have high LST values can be estimated as areas that have anomalies. Based on the results of the lineament density analysis, the higher density value in an area can indicate the better permeability where geothermal manifestations come out. The direction of the lineaments that control the study area is dominated by the northwest-southeast in accordance with the direction of the main stress, namely the Seulimum fault and the Aceh fault which also has a northwest-southeast direction. The overall results show that the Seulawah geothermal area is quite potential to be developed for the sustainable natural resource.","PeriodicalId":15073,"journal":{"name":"Journal of Applied Research and Technology","volume":"22 33","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140409609","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}
Pub Date : 2024-02-29DOI: 10.22201/icat.24486736e.2024.22.1.1837
A. Luna Álvarez, D. Mújica Vargas, J. D. J. Rubio, A. Rosales Silva
This article proposes a Pulse-Coupled Neural Network based on an adaptive Gabor filter for the segmentation of cracks in the pavement in digital images. By estimating the noise in the image, the parameters of the filter that convolves the neurons of the model are adjusted. As a result iterations were reduced to 2%with ? 90% precision. The algorithm was parallelized on the GPU and the processing time was reduced to n/NM regardless of the M and N dimensions of theimage.
{"title":"Pulse-coupled neural network based on an adaptive Gabor filter for pavement crack segmentation","authors":"A. Luna Álvarez, D. Mújica Vargas, J. D. J. Rubio, A. Rosales Silva","doi":"10.22201/icat.24486736e.2024.22.1.1837","DOIUrl":"https://doi.org/10.22201/icat.24486736e.2024.22.1.1837","url":null,"abstract":"This article proposes a Pulse-Coupled Neural Network based on an adaptive Gabor filter for the segmentation of cracks in the pavement in digital images. By estimating the noise in the image, the parameters of the filter that convolves the neurons of the model are adjusted. As a result iterations were reduced to 2%with ? 90% precision. The algorithm was parallelized on the GPU and the processing time was reduced to n/NM regardless of the M and N dimensions of theimage.","PeriodicalId":15073,"journal":{"name":"Journal of Applied Research and Technology","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140415295","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}
Pub Date : 2024-02-29DOI: 10.22201/icat.24486736e.2024.22.1.2120
S. Akolkar, H. R. Jariwala
This paper introduces a Discrete Wavelet Transform based very simple and fast acting algorithm with multi-resolution analysis to sense all types of faults in presence of power swings using current signal analyzation. The algorithm confirms very quick and efficient detection of various fault types in the first signal decomposition level of signal. The novelty of proposed algorithm lies in use of special type of Battle Lemarie mother wavelet having an advantage of perfect symmetry ensuring decomposition into B-Spline or same order polynomials capturing excellent speed and time-frequency localization of signal. The algorithm is tested for different fault parameters such as fault resistance, fault distance and time of initiation of faults considering EHV double circuit transmission line network and IEEE 9 Bus system developed in MATLAB environment. The proposed algorithm is capable of detecting all types of faults consistently within minimum time of 0.001 sec.
{"title":"Highly efficient relay triggering circuit for fault detection during Power swings","authors":"S. Akolkar, H. R. Jariwala","doi":"10.22201/icat.24486736e.2024.22.1.2120","DOIUrl":"https://doi.org/10.22201/icat.24486736e.2024.22.1.2120","url":null,"abstract":"This paper introduces a Discrete Wavelet Transform based very simple and fast acting algorithm with multi-resolution analysis to sense all types of faults in presence of power swings using current signal analyzation. The algorithm confirms very quick and efficient detection of various fault types in the first signal decomposition level of signal. The novelty of proposed algorithm lies in use of special type of Battle Lemarie mother wavelet having an advantage of perfect symmetry ensuring decomposition into B-Spline or same order polynomials capturing excellent speed and time-frequency localization of signal. The algorithm is tested for different fault parameters such as fault resistance, fault distance and time of initiation of faults considering EHV double circuit transmission line network and IEEE 9 Bus system developed in MATLAB environment. The proposed algorithm is capable of detecting all types of faults consistently within minimum time of 0.001 sec.","PeriodicalId":15073,"journal":{"name":"Journal of Applied Research and Technology","volume":"23 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140412594","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}
Pub Date : 2024-02-29DOI: 10.22201/icat.24486736e.2024.22.1.2136
G. Shini, J. L. Febin Daya, P. Balamurugan
The research focuses on the condition monitoring of supercapacitor systems installed in the electric vehicle that acts as the power source for the vehicle when it needs high power for a lesser time. This research work aims to introduce the Internet of Things in battery systems along with supercapacitors aiming to increase the efficiency and reliability of the system. In the corresponding research work, IoT-based condition monitoring for a 48V supercapacitor for an electric vehicle is implemented, the supercapacitor is charged using the phase shift full bridge DC-DC converter after that the data is transferred from the Matlab Simulink to the Thingspeak platform to enable IoT based application Hence establishing the real-time monitoring of super- capacitor. Introducing the Internet of Things will help researchers in a deeper understanding of supercapacitor behavior in a real-time environment as well as the real-time data will be helpful in the protection of the system.
{"title":"IoT-based real-time monitoring of supercapacitors used in electric vehicles","authors":"G. Shini, J. L. Febin Daya, P. Balamurugan","doi":"10.22201/icat.24486736e.2024.22.1.2136","DOIUrl":"https://doi.org/10.22201/icat.24486736e.2024.22.1.2136","url":null,"abstract":"The research focuses on the condition monitoring of supercapacitor systems installed in the electric vehicle that acts as the power source for the vehicle when it needs high power for a lesser time. This research work aims to introduce the Internet of Things in battery systems along with supercapacitors aiming to increase the efficiency and reliability of the system. In the corresponding research work, IoT-based condition monitoring for a 48V supercapacitor for an electric vehicle is implemented, the supercapacitor is charged using the phase shift full bridge DC-DC converter after that the data is transferred from the Matlab Simulink to the Thingspeak platform to enable IoT based application Hence establishing the real-time monitoring of super- capacitor. Introducing the Internet of Things will help researchers in a deeper understanding of supercapacitor behavior in a real-time environment as well as the real-time data will be helpful in the protection of the system. \u0000 ","PeriodicalId":15073,"journal":{"name":"Journal of Applied Research and Technology","volume":"28 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140414453","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}
Pub Date : 2024-02-29DOI: 10.22201/icat.24486736e.2024.22.1.1652
F. Aldana-Franco, F. Montes-González, S. Nolfi
Communication systems represent an evolutionary advantage for a group of robots solving coordinated tasks. In the field of evolutionary robotics, the emergence and establishment of communication are regulated by different variables. These systems are a tool produced by artificial evolution for the exchange of personal and environmental information. Since evolutionary processes involve multi-objective evolutionary methods, it is important to study all the mechanisms that affect the emergence and establishment of communication systems. One of these variables is the evolutionary advantage of emerging signals. In this article it is assumed that the signals appear because they are evolutionarily useful in solving a task. Emitter and receiver generate a process of conceptualization, which makes the signals associated with a meaning for the community. In this way an experiment is adapted to the FARSA simulator and the MARXBOT robot. This experiment consists of a group of robots that spend as much time as possible in a food zone and avoid a poisoned zone. Under normal conditions, robots tend to point to the food zone to attract the rest of the population. When the evolutionary importance of pointing out the food zone is reduced, the signals arise in different situations such as the presence of nearby objects and the poisoned zone. Communication is configured with the LED rings and linear cameras of the robots. In addition, an ethological method is adapted to quantify the behavioral effects of experimental manipulation.
通信系统代表了一组机器人在解决协调任务时的进化优势。在进化机器人学领域，通信的出现和建立受到不同变量的制约。这些系统是人工进化产生的一种交换个人和环境信息的工具。由于进化过程涉及多目标进化方法，因此研究影响通信系统出现和建立的所有机制非常重要。其中一个变量就是新兴信号的进化优势。本文假定，信号的出现是因为它们在进化过程中对解决任务有用。发射器和接收器会产生一个概念化过程，使信号与群体的意义相关联。通过这种方式，我们在 FARSA 模拟器和 MARXBOT 机器人上开展了一项实验。该实验由一组机器人组成，它们尽可能多地呆在食物区，并避开有毒区域。在正常情况下，机器人倾向于指向食物区以吸引其他群体。当指出食物区的进化重要性降低时，信号就会在不同的情况下出现，如附近有物体和有毒区域。通过机器人的 LED 环形灯和线性摄像头进行通信。此外，还采用了伦理方法来量化实验操作对行为的影响。
{"title":"improvement of signal communication for a foraging task using evolutionary robotics","authors":"F. Aldana-Franco, F. Montes-González, S. Nolfi","doi":"10.22201/icat.24486736e.2024.22.1.1652","DOIUrl":"https://doi.org/10.22201/icat.24486736e.2024.22.1.1652","url":null,"abstract":"Communication systems represent an evolutionary advantage for a group of robots solving coordinated tasks. In the field of evolutionary robotics, the emergence and establishment of communication are regulated by different variables. These systems are a tool produced by artificial evolution for the exchange of personal and environmental information. Since evolutionary processes involve multi-objective evolutionary methods, it is important to study all the mechanisms that affect the emergence and establishment of communication systems. One of these variables is the evolutionary advantage of emerging signals. In this article it is assumed that the signals appear because they are evolutionarily useful in solving a task. Emitter and receiver generate a process of conceptualization, which makes the signals associated with a meaning for the community. In this way an experiment is adapted to the FARSA simulator and the MARXBOT robot. This experiment consists of a group of robots that spend as much time as possible in a food zone and avoid a poisoned zone. Under normal conditions, robots tend to point to the food zone to attract the rest of the population. When the evolutionary importance of pointing out the food zone is reduced, the signals arise in different situations such as the presence of nearby objects and the poisoned zone. Communication is configured with the LED rings and linear cameras of the robots. In addition, an ethological method is adapted to quantify the behavioral effects of experimental manipulation.","PeriodicalId":15073,"journal":{"name":"Journal of Applied Research and Technology","volume":"76 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140411379","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}
Pub Date : 2024-02-29DOI: 10.22201/icat.24486736e.2024.22.1.2248
S. Muñoz Pérez, E. Sánchez Díaz, D. Barboza-Cullqui, J. M. García-Chumacero
The rapid development of populations and the demand in the consumption of concrete is generating the need to produce larger quantities of cement, which brings with it negative effects for the environment. Approximately 0.87 kg of CO2 is produced by the manufacture of cement; In addition, the use of aggregates is generating great concern in the construction industry, due to the costs and the restriction of these. Similarly, the accumulation of construction and demolition waste (RCA) and rice husk ash (RHA) contribute to pollution. Therefore, the objective of this manuscript is to review the literature on the use of RCA and RHA for the elaboration of concrete. For this, indexed articles were used, between the years 2017-2021. The results showed that when 8% RHA is added, the concrete reaches a compressive strength of 70 MPa; as well as, the flexural strength of concrete by adding 50% RCA + 1.50% basalt microfibers was increased by 29.44%. On the other hand, when RHA is added by 15% it reaches a compressive strength of 48.8 MPa; in turn, the mechanical performance at bending with 10% seashell by fine aggregate and 20% RHA by cement, reached a resistance of 65 MPa. Concluding, that the behavior of concrete undoubtedly depends on the proportions of either RCA or RHA; however, the percentages must be no more than 8% and 15% respectively.
{"title":"Use of recycled concrete and rice husk ash for concrete: A review","authors":"S. Muñoz Pérez, E. Sánchez Díaz, D. Barboza-Cullqui, J. M. García-Chumacero","doi":"10.22201/icat.24486736e.2024.22.1.2248","DOIUrl":"https://doi.org/10.22201/icat.24486736e.2024.22.1.2248","url":null,"abstract":"The rapid development of populations and the demand in the consumption of concrete is generating the need to produce larger quantities of cement, which brings with it negative effects for the environment. Approximately 0.87 kg of CO2 is produced by the manufacture of cement; In addition, the use of aggregates is generating great concern in the construction industry, due to the costs and the restriction of these. Similarly, the accumulation of construction and demolition waste (RCA) and rice husk ash (RHA) contribute to pollution. Therefore, the objective of this manuscript is to review the literature on the use of RCA and RHA for the elaboration of concrete. For this, indexed articles were used, between the years 2017-2021. The results showed that when 8% RHA is added, the concrete reaches a compressive strength of 70 MPa; as well as, the flexural strength of concrete by adding 50% RCA + 1.50% basalt microfibers was increased by 29.44%. On the other hand, when RHA is added by 15% it reaches a compressive strength of 48.8 MPa; in turn, the mechanical performance at bending with 10% seashell by fine aggregate and 20% RHA by cement, reached a resistance of 65 MPa. Concluding, that the behavior of concrete undoubtedly depends on the proportions of either RCA or RHA; however, the percentages must be no more than 8% and 15% respectively.","PeriodicalId":15073,"journal":{"name":"Journal of Applied Research and Technology","volume":"92 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140408524","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}
Pub Date : 2024-02-29DOI: 10.22201/icat.24486736e.2024.22.1.2147
O. Morfín, M. Gomez, J. Rodríguez, M. Murillo, N. Padilla
Renewable energy sources generate intermittent electrical power due to weather conditions, such as variations in wind speed and solar radiation. The distributed nature of renewable energy sources requires new techniques to maintain the quality of electrical service and efficient use of energy. One of these techniques uses of battery bank when a renewable energy source does not generate the power level contracted by the utility grid. In this article, a power compensator is proposed. It consists of a bidirectional DC converter located between the battery bank and the DC bus of the renewable source. This compensator has two operation modes: one to store the excessive power in a battery bank; the other to deliver power when power intermittency occurs. The validation of the proposed power compensator is made using a prototype where the DC voltage bus of a renewable energy source is emulated through a DC generator-motor group, which allows bidirectional power flow.
{"title":"Active power compensator for a DC voltage bus of a renewable source","authors":"O. Morfín, M. Gomez, J. Rodríguez, M. Murillo, N. Padilla","doi":"10.22201/icat.24486736e.2024.22.1.2147","DOIUrl":"https://doi.org/10.22201/icat.24486736e.2024.22.1.2147","url":null,"abstract":"Renewable energy sources generate intermittent electrical power due to weather conditions, such as variations in wind speed and solar radiation. The distributed nature of renewable energy sources requires new techniques to maintain the quality of electrical service and efficient use of energy. One of these techniques uses of battery bank when a renewable energy source does not generate the power level contracted by the utility grid. In this article, a power compensator is proposed. It consists of a bidirectional DC converter located between the battery bank and the DC bus of the renewable source. This compensator has two operation modes: one to store the excessive power in a battery bank; the other to deliver power when power intermittency occurs. The validation of the proposed power compensator is made using a prototype where the DC voltage bus of a renewable energy source is emulated through a DC generator-motor group, which allows bidirectional power flow.","PeriodicalId":15073,"journal":{"name":"Journal of Applied Research and Technology","volume":"3 36","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140410471","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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