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1
tesis de grado
Publicado 2023
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This bibliographical review allows us to know clearly and concisely the use and effectiveness of photocatalytic concrete applied to tracks or roads, and in buildings. This study analyzes sustainable concrete based on photocatalytic to reduce the environmental impact in large-scale works through the application for the collection and review of articles published in the scientific base of Scopus using the VOSviewer software tool that analyzes a large amount of data from a group of investigations, this research is carried out from the publications of the year 2000 to the year 2022. Graphs were obtained from the database analysis with the words “Concrete”, “Photocatalytic”, “Environmental” and “Work” with the highest interest in all analysis groups. The results obtained allow us to understand the innovation of concrete based on photocatalytic in order to reduce air pollution ...
2
artículo
Publicado 2011
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In order to attain a reasonable belief of the truth as an assumption of a constitutionalized legal proceeding, the action must be based on specific charges that will rule out any attempt to rule on the basis of intuition alone, grounded on mere suspicion, that denaturalizes the cognitive quality of the criminal proceeding; with a view to building a program to harness the punitive power based on a specific accusation. To this effect, the accusation requires a number of factual elements structured according to their legal qualification, based on elements of certainty which will result in a specific accusation that will enable a person to exercise the right of defense, generating an adversarial proceeding, thereby configuring the very essence of the proceeding.
3
artículo
Publicado 2011
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In order to attain a reasonable belief of the truth as an assumption of a constitutionalized legal proceeding, the action must be based on specific charges that will rule out any attempt to rule on the basis of intuition alone, grounded on mere suspicion, that denaturalizes the cognitive quality of the criminal proceeding; with a view to building a program to harness the punitive power based on a specific accusation. To this effect, the accusation requires a number of factual elements structured according to their legal qualification, based on elements of certainty which will result in a specific accusation that will enable a person to exercise the right of defense, generating an adversarial proceeding, thereby configuring the very essence of the proceeding.
4
artículo
Publicado 2012
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The objective of this work is to provide a reliable numerical model using the finite element method (FEM) for the dynamic analysis of reinforced concrete (RC) structures. For this purpose, a computer program based on a strain-rate sensitive elasto-plastic theory is developed using 3D brick finite elements. The implicit Newmark scheme with predictor and corrector phases is used for time integration of the nonlinear system of equations. In addition, the steel reinforcement is considered to be smeared and perfectly adhered to concrete and represented by membrane finite elements. Two benchmark examples are analyzed with the present numerical model and results are compared with those obtained by other authors. The present numerical model is able to reproduce the path failure, collapse loads and failure mechanism within an acceptable level of accuracy.
5
artículo
Publicado 2012
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The objective of this work is to provide a reliable numerical model using the finite element method (FEM) for the dynamic analysis of reinforced concrete (RC) structures. For this purpose, a computer program based on a strain-rate sensitive elasto-plastic theory is developed using 3D brick finite elements. The implicit Newmark scheme with predictor and corrector phases is used for time integration of the nonlinear system of equations. In addition, the steel reinforcement is considered to be smeared and perfectly adhered to concrete and represented by membrane finite elements. Two benchmark examples are analyzed with the present numerical model and results are compared with those obtained by other authors. The present numerical model is able to reproduce the path failure, collapse loads and failure mechanism within an acceptable level of accuracy.
6
artículo
Publicado 2025
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The aim of this research was to comparatively evaluate the structural response of a 21 m centrifugally reinforced concrete (C.A.C.) pole subjected to wind loads, applying the methodologies of ASCE 74 and CFE J6100-54 standards. The pole was modeled in SAP2000 v22 using both static and time-history dynamic analyses, considering service, maintenance, failure, and extreme wind load scenarios. Wind data were generated using the NOWS simulator for velicities up to 27.78 m/s. Results show a maximum displacement of 0.28 m under CFE and 0.20 m under ASCE, while maximum bending moments reached 145.92 kN.m and 133.47 kN.m, respectively. Statistical validation using ANOVA revealed non-significant differences (Fcalc=2.17 < Fcrit=4.26; p=0.144 > 0.05), confirming the technical equivalence between the standards. It is concluded that ASCE 74 provides higher accuracy by incorporating gust response...
7
artículo
Publicado 2018
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Concrete is the most common material used in most civil works because it is a highly resistant and with material steel has a good structural behavior, its production is used as the main cement component, which directly affects the cost , which is why it seeks to reduce the amount of cement with the addition of fly ash, which is a pollutant, waste of power plants. The objective was to dose mixtures of added fly ash as a substitute for the cement in such a way that it does not diminish the resistance of this one and to find the optimal dosage. The material and method used is normal concrete with fly ash additions to the design in proportions of 2.5%, 5.0%, 10.0% and 15.0% for breakages at 7, 14 and 28 days. The results indicate that after 28 days have resistances averaging 221kg/cm2 for both normal concrete as well as concrete with fly ash 2.5%, 231kg/cm2 for 5.0%, 200kg/cm2 ...
8
artículo
Publicado 2018
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Concrete is the most common material used in most civil works because it is a highly resistant and with material steel has a good structural behavior, its production is used as the main cement component, which directly affects the cost , which is why it seeks to reduce the amount of cement with the addition of fly ash, which is a pollutant, waste of power plants. The objective was to dose mixtures of added fly ash as a substitute for the cement in such a way that it does not diminish the resistance of this one and to find the optimal dosage. The material and method used is normal concrete with fly ash additions to the design in proportions of 2.5%, 5.0%, 10.0% and 15.0% for breakages at 7, 14 and 28 days. The results indicate that after 28 days have resistances averaging 221kg/cm2 for both normal concrete as well as concrete with fly ash 2.5%, 231kg/cm2 for 5.0%, 200kg/cm2 ...
9
artículo
Publicado 2018
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Concrete is the most common material used in most civil works because it is a highly resistant and with material steel has a good structural behavior, its production is used as the main cement component, which directly affects the cost , which is why it seeks to reduce the amount of cement with the addition of fly ash, which is a pollutant, waste of power plants. The objective was to dose mixtures of added fly ash as a substitute for the cement in such a way that it does not diminish the resistance of this one and to find the optimal dosage. The material and method used is normal concrete with fly ash additions to the design in proportions of 2.5%, 5.0%, 10.0% and 15.0% for breakages at 7, 14 and 28 days. The results indicate that after 28 days have resistances averaging 221kg/cm2 for both normal concrete as well as concrete with fly ash 2.5%, 231kg/cm2 for 5.0%, 200kg/cm2 ...
10
artículo
Publicado 2018
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Concrete is the most common material used in most civil works because it is a highly resistant and with material steel has a good structural behavior, its production is used as the main cement component, which directly affects the cost , which is why it seeks to reduce the amount of cement with the addition of fly ash, which is a pollutant, waste of power plants. The objective was to dose mixtures of added fly ash as a substitute for the cement in such a way that it does not diminish the resistance of this one and to find the optimal dosage. The material and method used is normal concrete with fly ash additions to the design in proportions of 2.5%, 5.0%, 10.0% and 15.0% for breakages at 7, 14 and 28 days. The results indicate that after 28 days have resistances averaging 221kg/cm2 for both normal concrete as well as concrete with fly ash 2.5%, 231kg/cm2 for 5.0%, 200kg/cm2 ...
11
artículo
Publicado 2019
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In the present investigation, a comparison was made between the Peruvian, Argentine, Bolivian and Brazilian standards of structural concrete, in order to analyze its content regarding the durability of the concrete and find possible shortcomings of the current Peruvian legislation. The durability of concrete is the ability of this material to withstand the action of various agents that modify its properties. This aspect has become important in recent years because its consideration in the design of structures could prevent problems such as cracking, corrosion, carbonation and others, which could put at risk the functionality of vital constructions in society, besides causing costs for repair and in the worst cases, reconstruction. To make a durable concrete, an analysis of the type of exposure in which the projected structure will be found is made, so that measures can be taken to mitiga...
12
artículo
Publicado 2021
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Crimes of danger, unlike crimes of harm, currently consist of a dogmatic category responsible for provoking wide-ranging discussions in the criminal-legal area. In this sense, considering the general conjuncture in which they are inserted, as well as the discussions about their necessity and legitimacy, this article pursued the objective of promoting analysis of the dogmatic model of abstract-concrete danger crimes as a proposition of an effective and guaranteed instrument of criminal typification. For an efficient approach to the theme, the theory of legal good’s protection was adopted as a theoretical mark, besides the deductive and dialectical methods, using mainly the bibliographic research technique, combined with jurisprudential research. Concerning the results obtained, the verified conclusion is that the crimes of danger are indispensable to the Postmodern Society, as well as l...
13
artículo
Publicado 2022
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New construction technologies and materials are currently applied more frequently in the search for quality improvements, considering the environmental and economic aspects of construction. The objective of the article is to carry out a systematic review on the use of ashes and fibers for the elaboration of ecological concrete. 56 indexed articles were reviewed with a publication age of 7 years, from 2015 to 2021, which are distributed in the following databases 21 articles in Scopus, 4 in EBSCO host, 9 in Scielo, 6 in Proquest, and 16 ScienceDirect, in which the use of ashes such as rice husk, sugar cane bagasse, fly ash, and fibers such as banana bark, sawdust, steel, glass, polypropylene, rubber, and granulated rubber. In conclusion, it was possible to verify that there are alternatives that allow the production of sustainable materials and/or products using ashes and fibers, which ...
14
artículo
Publicado 2021
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The fire in the structure causes the temperature of the concrete surface to increase, thus reducing its resistance to compression, bending and elastic modulus. Although concrete has a poorer conductor than steel, the constant high temperature on the surface causes gradual heating in its inner layer. As a building material, concrete is widely used due to its high resistance to fire, it is essential to withstand one of the most severe disasters that a structure can withstand in its life. The objective of this document is to carry out a systematic review of the effects that fire has on the mechanical and thermal properties of reinforced concrete structures. 50 articles published in a database indexed between the years 2011 and 2021 were reviewed, distributed as follows: 28 in Scopus, nine in Web of Science, eight in Scielo, three in ScienceDirect and two in EBSCO, referring to concrete resi...
15
artículo
Publicado 2021
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The fire in the structure causes the temperature of the concrete surface to increase, thus reducing its resistance to compression, bending and elastic modulus. Although concrete has a poorer conductor than steel, the constant high temperature on the surface causes gradual heating in its inner layer. As a building material, concrete is widely used due to its high resistance to fire, it is essential to withstand one of the most severe disasters that a structure can withstand in its life. The objective of this document is to carry out a systematic review of the effects that fire has on the mechanical and thermal properties of reinforced concrete structures. 50 articles published in a database indexed between the years 2011 and 2021 were reviewed, distributed as follows: 28 in Scopus, nine in Web of Science, eight in Scielo, three in ScienceDirect and two in EBSCO, referring to concrete resi...
16
artículo
Publicado 2022
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Concrete is one of the main building materials in Peru and worldwide, the study of its mechanical properties and concrete mix elaboration have been extensively developed over time. In the last years, new ways of elaboration with different materials have been searched, in order to improve its mechanical properties, including the fiber reinforced concrete. The study of its strain-stress mechanical properties of fiber reinforced concrete under monotonic load is the objective of this investigation, based on experimental tests performed in 90 samples, taking into account the influence of many factors, such as: Compression strength design, sample section geometry (square or circular section), slenderness (height/depth ratio), and the comparison of the reinforced concrete with its equivalent plain concrete in terms of mix design. From the experimental results, the use of fiber reinforcement inc...
17
tesis de grado
Publicado 2023
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A nivel mundial el desarrollo de la tecnología del concreto y la innovación en productos que modifican las propiedades del mismo, tienen un presuroso crecimiento. El Perú no es indiferente a esta carrera acelerada por la búsqueda de optimización de calidad y durabilidad del concreto. Es así que el estudio de la permeabilidad uno de los parámetros más importantes que definen tanto la resistencia como la durabilidad del concreto toma énfasis. Actualmente se usan adiciones y aditivos con la finalidad de mejorar las características del concreto y optimizar costos y tiempo de producción del mismo. El proceso de investigación realizado en este documento se enfoca en analizar probetas cilíndricas de 4 diseños a diferentes dosis de aditivo a base de nano sílice (0%, 0.5%, 1%, 1.5%) los cuales serán ensayos por lo métodos de resistencia a la compresión y permeabilidad según la ...
18
artículo
Publicado 2021
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This article deals with the flexural reinforcement of reinforced concrete beams through carbon fiber reinforced polymer (CFRP), with the main objective of comparing the results obtained with a theoretical reinforcement design and those obtained in beams with CFRP reinforcement. tested under point load, as well as establishing the influence it has on the capacity of the beams to bending. The process of elaboration of the specimens with and without CFRP reinforcement and with the same amount of reinforcing steel is described, as well as the test carried out under point load to each beam, the amount of CFRP reinforcement is detailed, all this based on a beam obtained from the structural analysis carried out for a model building subjected to different overloads to generate an increase in the bending moment, making it necessary to place the CFRP reinforcement. Finally, the comparison between ...
19
artículo
Publicado 2021
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This article deals with the flexural reinforcement of reinforced concrete beams through carbon fiber reinforced polymer (CFRP), with the main objective of comparing the results obtained with a theoretical reinforcement design and those obtained in beams with CFRP reinforcement. tested under point load, as well as establishing the influence it has on the capacity of the beams to bending. The process of elaboration of the specimens with and without CFRP reinforcement and with the same amount of reinforcing steel is described, as well as the test carried out under point load to each beam, the amount of CFRP reinforcement is detailed, all this based on a beam obtained from the structural analysis carried out for a model building subjected to different overloads to generate an increase in the bending moment, making it necessary to place the CFRP reinforcement. Finally, the comparison between ...
20
tesis de grado
Publicado 2022
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Ante la necesidad de nuevos materiales que cumplan con las especificaciones requeridas para la estabilización de subrasantes, se propone el reciclaje y la reutilización de los residuos de construcción y demolición de concreto (RCD-C) con la finalidad de compensar la contaminación ambiental y al mismo tiempo preservar los recursos naturales no renovables, ante el incremento de la generación de residuos de construcción y demolición, que tienen como disposición final los botaderos y vertederos informales de las ciudades. Este estudio experimental evalúa la influencia de la adición de RCD-C en la estabilización de subrasantes de baja capacidad portante (CBR), para lograr el objetivo se adicionó 2%, 5%, 9%, 15% y 25% de RCD-C al material de la subrasante. Durante el proceso experimental se desarrollaron ensayos para determinar las propiedades físicas, mecánicas y químicas del ...
