Mostrando ítems 1-20 de 46

Risk-assessment V1.0: A new interactive software to develop risk assessment using MATLAB®

Cardenas Escorcia, Yulineth; Valencia-Ochoa, Guillermo; Cárdenas-Gutiérrez, Javier Alfonso (Chemical Engineering TransactionsItalia, 2018)

This article presents the use of an interactive computer tool developed in MATLAB® called RISKASSESSMENT v1.0, to perform market risk analysis of commercial products, through the development of cash flow, sensitivity ...
Poder calorífico de la cascarilla de arroz usada como combustible en hornos de secado

Ramón Ramón, Sergio Andrés; Cárdenas-Gutiérrez, Javier Alfonso; Rojas Suárez, Jhan Piero (Mundo FESCColombia, 2018-07-01)

industriales. Algunos estudios han demostrado que sus propiedades térmicas sustentan su uso como fuente de energía para la combustión en hornos, incluso a un nivel industrial, como sucede en empresas del sector arrocero ...
PEST study of CO2 capture strategy from 2007 to 2018

Mendoza-Casseres, Daniel; Valencia, Guillermo Eliecer; Cárdenas-Gutiérrez, Javier Alfonso (Contemporary Engineering SciencesBulgaria, 2018-08-18)

Currently, CO2 capture and storage is a method approved by many countries to combat CO2 emissions, taking power and oil plants as study areas. According to many climate agreements made in the last decade, developed ...
An integral PEST study of biomass as energy resource

Mendoza Cassere, Daniel; Valencia, Guillermo Eliecer; Cárdenas-Gutiérrez, Javier Alfonso (Contemporary Engineering SciencesBulgaria, 2018-08-18)

The present work was carried out in order to evaluate the world's scientific production with respect to the topic of biomass, based on articles published from 2007 onwards. The data were obtained from the Web of Science ...
Mass transfer simulation of liquid-liquid extraction systems using an educational software

Roncallo, Gian Franco; Barrios, Kelly Johanna; Obregon, Luis Guillermo; Valencia, Guillermo Eliecer; Cárdenas-Gutiérrez, Javier Alfonso (Contemporary Engineering SciencesBulgaria, 2018-08-18)

In order to improve the learning process about the unit operation of Liquid Extraction, it is presented a GUI in Matlab® for designing extracting systems with different types of contact, where the stages reach the ...
Parametric study of leaching processes using a GUI developed in Matlab

Roncallo, Gian; Barrios, Kelly; Obregon, Luis Guillermo; Valencia, Guillermo Eliecer; Cárdenas-Gutiérrez, Javier Alfonso (Contemporary Engineering SciencesBulgaria, 2018-08-18)

With the aim to enhance the learning process of the unit operation of Leaching, it is presented a GUI in Matlab® for designing systems with different types of contact where the stages reach the equilibrium between the ...
Incidence of the lean philosophy construction in the productivity and analysis of processes in internal finishes in masonry living quarters in the construction projects: case-residential complex Callejas-Cucuta-Colombia

Hurtado-Figueroa, Oswaldo; Cárdenas-Gutiérrez, Javier Alfonso; Acevedo Peñaloza, Carlos Humberto (Contemporary Engineering SciencesBulgaria, 2018-08-30)

The technical supervision in the construction projects is of special importance for the correct execution of the activities, its objective is to reduce the errors that are incurred when carrying out the processes inherent ...
Scientometric analysis of research on eSports from 2007 to 2017

Camargo Vanegas, Josué; Cárdenas-Gutiérrez, Javier Alfonso; Valencia Ochoa, Guillermo (Contemporary Engineering SciencesBulgaria, 2018-08-30)

A scientometric analysis about eSports publications from 2007 to 2017 was carried out. HistCite was used to analyze the data collected from Web of Science during the period mentioned. The results suggest that eSports ...
The architecture on land and its construction techniques, millenary tradition that is reborn

Hurtado-Figueroa, Oswaldo; Cárdenas-Gutiérrez, Javier Alfonso; Acevedo Peñaloza, Carlos Humberto (Contemporary Engineering SciencesBulgaria, 2018-08-30)

In the context of sustainable development, the use of materials of low environmental impact in the activities inherent to the construction of houses plays an important role when it comes to reducing waste pollution. The ...
Implementation of a fuel measurement system based on the gravimetric principle for applications in engine test bench

Duarte, Jorge; Valencia, Guillermo E.; Cardenas Gutierrez, Javier; Guzman, Javier; Porto, Andres (Contemporary Engineering SciencesBulgaria, 2018-09-12)

This paper documents the implementation process of a fuel measurement system based on the gravimetric principle for applications in Engine Test Bench. To do this, the design of the measurement hardware consists of a ...
Influence of natural frequency on stability during milling of inconel and udimet 500

Coba Salcedo, Milton Fabian; Cárdenas-Gutiérrez, Javier Alfonso; Acevedo Peñaloza, Carlos Humberto (Contemporary Engineering SciencesBulgaria, 2018-09-18)

Chatter in the machine tools represents one of the biggest problems due to the instability in the machining process, breakage of the tool and accelerated wear of the tool and spindle or machine components in the metal ...
Delay at bus stops of Metrolinea transport system, based on parameters measured "in situ". Case study Bucaramanga-Colombia

Peña, Carlos A.; Velasco, Karen D.; Cardona, Paula A. (Transportation Research ProcediaEspaña, 2018-10)

The purpose of this research is to determine the theoretical capacity of the Metrolinea transport system according on delay at bus stop predictive model, based on parameters measured “in situ”. The Metrolinea is an integrated ...
Behaviour of the contact trace in a cam-follower system when the displacement law has been designed using bézier curves

Acevedo Peñaloza, Carlos Humberto; Henao Leon, Diego; Rojas Suárez, Jhan Piero (Contemporary Engineering SciencesBulgaria, 2018-11-06)

The study shows the distribution of the contact trace in a cam - follower mechanism in which the Bézier curves of degrees 5, 7 and 9 have been used for the design of displacement of the follower. The equations that ...
Determination of the theoretical stress concentration factor in structural flat plates with two holes subjected to bending loads

Acevedo Peñaloza, Carlos Humberto; Rojas Suárez, Jhan Piero; Espinel Blanco, Edwin (Contemporary Engineering SciencesBulgaria, 2018-11-22)

Numerous research works have studied the stress distribution in sections with geometric discontinuities and the relationship with the theoretical factor of stress concentration using the finite element method. These works ...
Application of LEAN tool "line balancing" to determine the productivity of workforce in activities of plastering and internal detailing in two-story houses made of masonry

Hurtado-Figueroa, Oswaldo; Cárdenas-Gutiérrez, Javier Alfonso; Rojas Suárez, Jhan Piero (Contemporary Engineering SciencesBulgaria, 2018-11-26)

The finishing work of construction represents an aggregated value that makes the difference when a client is deciding to buy a house. The stipulated costs for plastering and detail activities for houses, in occasions, ...
Handling of concrete with addition of residual ceramic material in different % replacing conventional stony aggregate

Hurtado-Figueroa, Oswaldo; Cárdenas-Gutiérrez, Javier Alfonso; Cordero Estevez, Gerson David (Contemporary Engineering SciencesBulgaria, 2018-11-26)

A conventional concrete mixture elaborated according to the parameters described in the Colombian Technical Standards NTC under the conditioning established by the Quake Resistant Standard NSR-10 that regulates our ...
Substitution of natural stony material aggregates in conventional 17.5 mpa non-structural concrete mixtures by means of percentage addition of hospital solid waste

Hurtado-Figueroa, Oswaldo; Cárdenas-Gutiérrez, Javier Alfonso; Acevedo Peñaloza, Carlos Humberto (Contemporary Engineering SciencesBulgaria, 2018-11-29)

An experimental character research was carried out. A conventional concrete mixture was made with the mechanical resistance to compression of 17.5 Mpa. The materials used in the concrete mixture were analyzed and selected ...
Implementation of hospital waste replacing stony aggregates in non-structural concrete mixes of low resistance

Hurtado-Figueroa, Oswaldo; Rojas Suárez, Jhan Piero; Cárdenas-Gutiérrez, Javier Alfonso (Contemporary Engineering SciencesBulgaria, 2018-11-29)

A non-structural concrete mix was elaborated with a resistance of 14.5 Megapascals under the parameters indicated in the American Concrete Institute (ACI), ASTM and the Colombian Technical Standards (NTC). Six mixing cylinders ...
Determination of the quality of coarse aggregates for the elaboration of concrete mixes from 3 water sources in the City of Cucuta-Colombia

Hurtado-Figueroa, Oswaldo; Cárdenas-Gutiérrez, Javier Alfonso; Rojas Suárez, Jhan Piero (Journal of Physics: Conference SeriesReino Unido, 2018-12-07)

A comparative analysis was performed on the mineral material extracted from 3 water sources in the city of Cucuta, from the rivers Tachira, Pamplonita and Zulia to determine the viability of their incorporation in the ...
Verification of compression resistance between a conventional concrete and its addition of 5, 10 and 15% in volume of fly ash replacing fine aggregate

Prada Botia, Gaudy Carolina; Hurtado-Figueroa, Oswaldo; Cárdenas-Gutiérrez, Javier Alfonso (Journal of Physics: Conference SeriesReino Unido, 2018-12-07)

A comparative analysis was performed with regarding the compression resistance of a conventional concrete mixture and its experimental addition of 5, 10 and 15% of fly ash with respect to the volume of its fine aggregate. ...

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Risk-assessment V1.0: A new interactive software to develop risk assessment using MATLAB®
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Cardenas Escorcia, Yulineth | 2018

This article presents the use of an interactive computer tool developed in MATLAB® called RISKASSESSMENT v1.0, to perform market risk analysis of commercial products, through the development of cash flow, sensitivity analysis, and SpiderPlot graphics, which allow the identification of the economic-financial equilibrium point of a company. The tool facilitates the reduction of the uncertainty produced in the return on investment due to changes in the economic environment of the sector in which the company operates, through statistical techniques and tools that involve parameters such as the annual effective rate in the Colombian national currency, net present value, internal rate of return, period of recovery of capital, through a sensitivity analysis. To validate the effectiveness of using software in the development of risk analysis, a case study was conducted for an alcohol beverage sales business, where, based on the portfolio containing the product quantity, unit variable cost, sales price, percentage of sales growth and annual sales volume, in addition to detailed information on the initial investment, the cash flow with a 5-year horizon, the net present value, the internal rate of return, the period of capital recovery and the average accounting profitability are calculated. The tool also performs sensitivity analysis and SpiderPlot for each of the products. Finally, the program presented allows to calculate the annual cash flows in a fast and didactic way, which normally requires time and specialized training in a traditional exercise.

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Poder calorífico de la cascarilla de arroz usada como combustible en hornos de secado
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Ramón Ramón, Sergio Andrés | 2018-07-01

industriales. Algunos estudios han demostrado que sus propiedades térmicas sustentan su uso como fuente de energía para la combustión en hornos, incluso a un nivel industrial, como sucede en empresas del sector arrocero de Cúcuta. Objetivo: Puntualmente, en este caso, se busca determinar el poder calorífico de la cascarilla de arroz que se usa como combustible en los hornos de secado en una de las arroceras de la región nortesantandereana y evaluar así, su eficiencia como fuente de energía térmica. Métodos: Para determinar la propiedad térmica en mención, se prepararon muestras de cascarilla pulverizada pasando por el proceso de cuarteo, molienda y tamizado; muestras llevadas al calorímetro. Resultados: Se encontró que el poder calorífico de esta cascarilla de arroz supera los 3700 cal/gr con un 0,15% de azufre. Conclusión: Se puede afirmar que es totalmente válido el uso de la cascarilla de arroz como fuente de energía para el proceso de secado del grano en arroceras regionales pues su poder calorífico, está incluso por encima de otras muestras estudiadas a nivel mundial.

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PEST study of CO2 capture strategy from 2007 to 2018
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Mendoza-Casseres, Daniel | 2018-08-18

Currently, CO2 capture and storage is a method approved by many countries to combat CO2 emissions, taking power and oil plants as study areas. According to many climate agreements made in the last decade, developed countries have implemented capture and storage projects in several countries, resulting in a reduction of CO2 emissions and being a key player in reducing global temperatures by 2050 using protocols, research centres and government support for future capture projects. The study conducted research on the countries with the largest number of publications on CO2 capture, considering the actions taken by different governments on issues related to politics, economics, society and technology with the help of a PEST analysis.

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An integral PEST study of biomass as energy resource
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Mendoza Cassere, Daniel | 2018-08-18

The present work was carried out in order to evaluate the world's scientific production with respect to the topic of biomass, based on articles published from 2007 onwards. The data were obtained from the Web of Science data collection, and analyzed, through the HitsCite metadata processor, within which indicators were highlighted, such as the number of total publications, the countries that publish the most, in different periods of years, to establish the trend graphically and in the future, to be able to predict the behavior that will occur. The results show that of the 874 articles published to date, 168 were published by the United States, which is equivalent to 19.2%, followed by China, Italy and finally the United Kingdom with 65 articles published (7.4%), 64 articles (7.3%) and 56 articles published (6.4%) respectively. In addition, a PEST analysis was developed to analyses the behavior of the number of publications in relation to the political, economic, social and technological fields for each country studied, in order to be able to create means of prediction in the future.

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Mass transfer simulation of liquid-liquid extraction systems using an educational software
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Roncallo, Gian Franco | 2018-08-18

In order to improve the learning process about the unit operation of Liquid Extraction, it is presented a GUI in Matlab® for designing extracting systems with different types of contact, where the stages reach the equilibrium between both liquid phases. The program called ExtractING is an application of theoretical studies and material balances presented in highly relevant documents and popular academic books, which has a general procedure that initiates by introducing feed and solvent quantities with their respective compositions, and a raffinate exit condition for multistage equipment. It is necessary to introduce the ternary system (solute, dissolvent, diluent) and an operating temperature to calculate equilibrium conditions with Van Laar activity model equations. Material balances, multiple iterative routines, and equilibrium diagrams were used to calculate raffinate and extract conditions in all the stages as well as the minimum number of stages needed for the required separation allowing the user to get the approximate size and cost of the equipment, making this software a powerful academic tool. With the program, it was compared the maximum separation for specified conditions between counter-current and crosscurrent equipment, the separation percentage behavior with an increasing feed quantity, and the separation behavior with variations of temperature.

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Parametric study of leaching processes using a GUI developed in Matlab
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Roncallo, Gian | 2018-08-18

With the aim to enhance the learning process of the unit operation of Leaching, it is presented a GUI in Matlab® for designing systems with different types of contact where the stages reach the equilibrium between the solid and liquid phase. The program called LeachING is an application of theoretical studies and material balances presented in highly relevant documents and popular academic books, which has a general procedure that initiates by introducing the feed and solvent quantities with their respective compositions, and a raffinate exit condition for multistage equipment. Finally, material balances and multiple iterative routines were used to calculate raffinate and extract exit conditions, and the minimum number of stages necessary to reach them, allowing the user to get the approximate size and cost of the equipment making this software a powerful academic tool. With the program, it was compared the maximum separation for given conditions between countercurrent and crosscurrent equipment, the behavior of the percentage of separation when increasing feeding with constant solvent, and the behavior of the maximum feeding for the different types of contact.

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Incidence of the lean philosophy construction in the productivity and analysis of processes in internal finishes in masonry living quarters in the construction projects: case-residential complex Callejas-Cucuta-Colombia
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Hurtado-Figueroa, Oswaldo | 2018-08-30

The technical supervision in the construction projects is of special importance for the correct execution of the activities, its objective is to reduce the errors that are incurred when carrying out the processes inherent to its development. The finishes, as a final stage in the construction of homes, generate visual appeal to customers by encouraging their option of purchase. However, the costs contemplated in this stage are important in the budget. Defining an efficient work method helps improve the completion time of the activity by promoting compliance with the schedule stipulated for the project, together with the improvement of profitability for the contractor. The present work applies some tools of the Lean Construction philosophy of the two methods implemented in the application of the coating and detailing or final finishing for houses built in masonry, through continuous observation, using the balance sheet tools, the Last Planner system with the weekly schedule and lines of balance for the programming of activities. From these measurements, time-operator relationships were obtained, which sought to identify productive, contributory and noncontributory activities that affect productivity in the development of the project, reaching conclusions that maximize productivity, reducing activities that do not generate value to the Project.

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Scientometric analysis of research on eSports from 2007 to 2017
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Camargo Vanegas, Josué | 2018-08-30

A scientometric analysis about eSports publications from 2007 to 2017 was carried out. HistCite was used to analyze the data collected from Web of Science during the period mentioned. The results suggest that eSports research has increased during the 11 years of study; the country with the highest number of publications was the United States of America, with eight institutions predominant in the number of publications. Most of the articles and the highest local score of total citations come from countries where eSports are considered sport; the top three journals with the most publications were International Journal of Gaming and Computer-Mediated Simulations, Games and Culture and Psychology of Sport and Exercise, where the top three journals with the highest TLCS are Games and Culture, New Media & Society and Computers in Human Behavior.

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The architecture on land and its construction techniques, millenary tradition that is reborn
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Hurtado-Figueroa, Oswaldo | 2018-08-30

In the context of sustainable development, the use of materials of low environmental impact in the activities inherent to the construction of houses plays an important role when it comes to reducing waste pollution. The alternative materials to be used in the various construction processes, besides being totally renewable, they must be reusable, available locally and have little or no energy expenditure in its extraction, preparation and application. The Bio resources or Eco materials meet these requirements, of which land as ancestral material used in millenary construction techniques, it becomes the most feasible alternative for its use as a construction material to replace the conventional ones. The main objective is the literary review of articles published in reliable databases, whose research topic was based on the analysis and use of land and natural materials for application in housing construction. The articles were categorized, analyzed and integrated into a synthesized structure to extract the important aspects in the thematic introduction, the constructive techniques, the results of the processes carried out and finally, the conclusions on the constructive implementation of the elements studied. In this way it offers information of interest to people who want to delve into the subject investigated.

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Implementation of a fuel measurement system based on the gravimetric principle for applications in engine test bench
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Duarte, Jorge | 2018-09-12

This paper documents the implementation process of a fuel measurement system based on the gravimetric principle for applications in Engine Test Bench. To do this, the design of the measurement hardware consists of a gravimetric scale with serial output, feed pump, and a valve; which interact with each other thanks to the programming developed in the Arduino UNO® environment, it is possible to guarantee protection against possible disturbances that may affect the data measured by the scale by means of an acrylic structure. For the visualization and interaction with the information collected by the meter, an executable application is made using the LabView ™ computational tool. Finally, a series of runs are carried out to guarantee compatibility with the existing testbench in the laboratory and to demonstrate the functionality of the system.

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Influence of natural frequency on stability during milling of inconel and udimet 500
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Coba Salcedo, Milton Fabian | 2018-09-18

Chatter in the machine tools represents one of the biggest problems due to the instability in the machining process, breakage of the tool and accelerated wear of the tool and spindle or machine components in the metal cutting processes, such as turning, milling, boring, drilling, etc. Which translates into a poor-quality surface finish, this phenomenon consists of self-excited vibrations that are produced and maintained due to shear forces, the purpose of this article is to predict the optimal points of operation in the milling process for Ni-based Inconel and make a comparison with Ni-based Udimet 500 through observation supported by a graphical and analytical tool to generate stability lobe diagrams, a code was developed in the MATLAB® software capable of generating stability lobe diagrams for the milling operation that provides optimal operating points to avoid tool vibration, thus improving chip removal rates and increasing productivity.

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Delay at bus stops of Metrolinea transport system, based on parameters measured "in situ". Case study Bucaramanga-Colombia
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Peña, Carlos A. | 2018-10

The purpose of this research is to determine the theoretical capacity of the Metrolinea transport system according on delay at bus stop predictive model, based on parameters measured “in situ”. The Metrolinea is an integrated mass transportation system (SITM) which was developed in Bucaramanga, Colombia, and is based on the concept of a bus rapid transit (BRT) with fixed stops in exclusive places. It has a design, service and specialized infrastructure. It follows a trunk line structure interconnecting the three neighboring municipalities of Bucaramanga, Floridablanca and Piedecuesta, guaranteeing their use and high passenger demand. The project consists of a delay model at bus stops along the different stops of the trunk corridor that connect these three municipalities, allowing us to predict the most useful parameter. The methodology developed in situ consists of visual observation, executed in the existing trunk, and has an approximate length of 16.8 Km. The distance between each of its stations is variable, ranging from 230m to 2980m. The measuring requires one to board the bus, record the times spent during the journey, calculating the one with the highest demand, recording the flow of passengers, as well as calculating the delay times, interruptions and incidents. The data was collected in the year 2017 on market days. The calculation methodology used is contained in the manual of transit capacity and quality of service (TCQSM), this allowed us to determine the calculations corresponding to the theoretical capacity of the system and delay at the bus stops model.

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Behaviour of the contact trace in a cam-follower system when the displacement law has been designed using bézier curves
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Acevedo Peñaloza, Carlos Humberto | 2018-11-06

The study shows the distribution of the contact trace in a cam - follower mechanism in which the Bézier curves of degrees 5, 7 and 9 have been used for the design of displacement of the follower. The equations that describe the movement of the follower and its derivatives are presented, the expressions are formulated for the contact trace, the force exerted on the mechanical assembly are formulated and the results obtained are presented in a model mechanism.

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Determination of the theoretical stress concentration factor in structural flat plates with two holes subjected to bending loads
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Acevedo Peñaloza, Carlos Humberto | 2018-11-22

Numerous research works have studied the stress distribution in sections with geometric discontinuities and the relationship with the theoretical factor of stress concentration using the finite element method. These works have dealt with topics such as the influence of the length of pieces on the 𝐾�𝑡� factor in rectangular orthotropic plates; The behavior of the stress concentration factor on short shafts with section changes under bending loads; The theoretical factor of stress concentration in flat parts subjected to tension with "U" grooves; The estimation of the theoretical stress concentration factor 𝐾�𝑡� for a flat plate with two holes subjected to tension loads. Other studies have compared the stress distribution by applying three methods: elasticity theory, finite element analysis and experimental techniques. Results show that the finite element method is effective in solving the problem. The goal of this research is to determine the theoretical stress concentration factor for a flat plate with two holes subjected to bending applying the finite element method. The modeling of the plate, the application of the loads, the mesh generation and the simulation of the stress distribution were made using the software ANSYS® Workbench. Four holes with different sizes were worked and for each of them 10 different values of the distance between centers were taken. In this way the relationship between the factor 𝐾�𝑡�, the size of the holes and the distance between centers was found. This information is of great importance for the design of mechanical elements that are under these conditions.

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Application of LEAN tool "line balancing" to determine the productivity of workforce in activities of plastering and internal detailing in two-story houses made of masonry
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Hurtado-Figueroa, Oswaldo | 2018-11-26

The finishing work of construction represents an aggregated value that makes the difference when a client is deciding to buy a house. The stipulated costs for plastering and detail activities for houses, in occasions, surpasses 30% of the total value of the construction work, considerable costs that require constant control and supervision both in the analysis and the execution of the construction. The implementation of the LEAN philosophy in this activity is not commonly implemented due to the lack of knowledge of the tools that this method provides. This research shows the implementation of line balancing, as a LEAN tool, in the plastering and detailing activities for two-story masonry houses, constructed in the housing project Callejas del Este which took place in the city of Cucuta, Colombia. The implementation of this tool contemplated the analysis of execution times of the work crew, the results were synthesized in tables for better interpretation and conclusions of interest were developed for the improvement of the observed processes and activities.

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Handling of concrete with addition of residual ceramic material in different % replacing conventional stony aggregate
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Hurtado-Figueroa, Oswaldo | 2018-11-26

A conventional concrete mixture elaborated according to the parameters described in the Colombian Technical Standards NTC under the conditioning established by the Quake Resistant Standard NSR-10 that regulates our country. A residual ceramic sample was taken from elements of masonry and tiles from the brick industry Santa Rosa, the obtained material was taken to the crusher La Victoria, where the milling process and reduction of particles was performed as well as to the conventional mineral aggregates. The granulometry was performed to the coarse aggregate of the crushed ceramic material according to the NTC-77, simultaneously the respective test to determine its physical properties according to the stipulated by the same standards were performed. Designs of experimental mixtures were made, 10, 20-100% of the weight of the conventional concrete coarse aggregate was replaced by its equivalent in ceramic coarse aggregate. To the designs of both conventional and experimental mixtures, the test of concrete setting was performed with the help of the concrete slump test to determine its handling. The results obtained by the test performed to the different mixtures were portrayed in a table, were the obtained data for the conventional concrete mixture was used as a comparative base for the rest of the data.

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Substitution of natural stony material aggregates in conventional 17.5 mpa non-structural concrete mixtures by means of percentage addition of hospital solid waste
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Hurtado-Figueroa, Oswaldo | 2018-11-29

An experimental character research was carried out. A conventional concrete mixture was made with the mechanical resistance to compression of 17.5 Mpa. The materials used in the concrete mixture were analyzed and selected based on the parameters established in the Colombian Technical Standards and the ASTM International Standards. They were made 6 test cylinders with the mentioned concrete mixture to which, the compressive strength of the concrete was checked it, 3 of them 7 days after they were made and the rest of them 28 days later, respectively. Thereafter, their drying process by immersion, the data thrown by the tests were averaged and tabulated. The Hospital waste solid incinerated and treated by Ecosteryl machine which is located at Guayabal environmental technology park in Cucuta city was collected. The material resulting from the incineration and treatment of the hospital solid waste was selected taking only the particles equal to or less than 20mm resulting from the crushing process by Ecosteryl. With the selected Particulate material, 3 experimental mix designs were made, which 2.5, 5 and 7.5% of the total weight of the natural stone aggregates present in the conventional concrete mixture was replaced. With each experimental mixture made, 6 cylinders were tested at 7 and 28 days, a process carried out in the same way as that implemented in the conventional concrete mix for both tests and data collection and analysis. The comparative tables showed that the experimental mixture I, where 2.5% of the total weight of the aggregate of the conventional concrete mixture was replaced, was the one that obtained the highest compressive strength surpassing the result of the conventional concrete mixture.

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Implementation of hospital waste replacing stony aggregates in non-structural concrete mixes of low resistance
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Hurtado-Figueroa, Oswaldo | 2018-11-29

A non-structural concrete mix was elaborated with a resistance of 14.5 Megapascals under the parameters indicated in the American Concrete Institute (ACI), ASTM and the Colombian Technical Standards (NTC). Six mixing cylinders were made with the concrete mix to test their mechanical resistance using the compressive resistance test, 3 were tested on day 7 and the 3 left were tested on day 28, the tests were performed in the IBERFEST machine, located in the laboratory of resistance of materials of the University Francisco de Paula Santander in the city of Cucuta, Colombia. The results were averaged to obtain the data of interest. Hospital solid waste was treated and processed in the Ecosteryl machine 250C, located in the environmental technology park Guayabal, Cucuta. The processes for the treatment of the waste material were performed under the established procedures in the Colombian decree 2676 of 2000. Taking particles, no bigger than 20mm of waste material, 2.5, 5 and 7.5% of the total stony aggregate used for the elaboration of the non-structural concrete was replaced, each of the 3 percentages were used for the elaboration of the 6-cylinder mixes (2 of each). The cylinders were tested on days 7 and 28 using the same procedure implemented to the mix of non-structural concrete. With the data obtained from the tests a comparative analysis was performed, identifying the presented characteristics of each.

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Determination of the quality of coarse aggregates for the elaboration of concrete mixes from 3 water sources in the City of Cucuta-Colombia
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Hurtado-Figueroa, Oswaldo | 2018-12-07

A comparative analysis was performed on the mineral material extracted from 3 water sources in the city of Cucuta, from the rivers Tachira, Pamplonita and Zulia to determine the viability of their incorporation in the concrete mixtures for the construction of rigid floors. There were visits to the companies Preconcretos Trituradora la Roca y Concretos, and Tirurados, in charge of the material extractions, where samples of the crushed material "coarse aggregate" from each of the water sources were taken respectively. The granulometry of the coarse aggregate was performed according to the arranged parameters in the NCT 174 whose results were determinant for the conclusions. The trial of degradation to abrasion to each of the samples was executed, taking as guide the indications described by the Colombian INV-218-13 standard. The results obtained in the trial were analyzed and compared with the parameters stipulated by the INV standard described for the % of the degradation limit allowed for coarse aggregate for its usage as concrete material in the construction of rigid floors. It was concluded that each of the extracted materials from the water sources were viable according to the data obtained from their comparison.

LEER
Verification of compression resistance between a conventional concrete and its addition of 5, 10 and 15% in volume of fly ash replacing fine aggregate
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Prada Botia, Gaudy Carolina | 2018-12-07

A comparative analysis was performed with regarding the compression resistance of a conventional concrete mixture and its experimental addition of 5, 10 and 15% of fly ash with respect to the volume of its fine aggregate. The fly ash came from the thermoelectric Termotasajero located in the city of Cucuta in the Norte de Santander Department, Colombia, the previous studies performed on fly ash by the thermoelectric laboratories were useful as a reference to classify the ash. The results obtained in the compression tests for the experimental mixtures were compared to the results of the conventional concrete, where a superiority in the resistance of the experimental mixtures in early stages (7 days) was evidenced. Regarding tests performed on day 14 a minimum difference when comparing the mixtures was noted. The resistance test performed on day 28 showed superiority on the conventional mixture with a 2.03 Megapascals advantage with respect to the strengths of the experimental mixes.

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