Victor Jiménez Arguelles, Luis Antonio Rocha Chiu, Aurora Poó Rubio
This article describes the main stages involved in the construction of the vertical shafts (large-diameter vertical wells), which are necessary for the subsequent construction of the tunnel´s sections. The different risk situations existing during the construction of the Eastern Drainage Tunnel in the valley of Mexico City (in Spanish, "Tunel Emisor Oriente") are analyzed. In order for this 52 km-long and 7.5 m-wide tunnel to carry part of the city’s sewage, 25 shafts must first be built, ranging from 55 to 150 meters deep. The magnitude of such a project implies working in different geographical areas and varied geological strata involving the presence of groundwater, which increases the risks due to possible landslides or flooding during excavation. As digging will occur in different types of soil, varying procedures must be used depending on soil type. Likewise, due to the magnitude of this kind of project, detailed scheduling and planning are required as simultaneous works on different fronts are necessary to meet deadlines. The study mentions that, while projects like these involve high risks for workers, analysis of activities and situations are conducted precisely to demonstrate that such risks can be considerably reduced.
{"title":"Risks involved in vertical shafts construction for the eastern drainage tunnel in Mexico","authors":"Victor Jiménez Arguelles, Luis Antonio Rocha Chiu, Aurora Poó Rubio","doi":"10.7764/ric.00016.21","DOIUrl":"https://doi.org/10.7764/ric.00016.21","url":null,"abstract":"This article describes the main stages involved in the construction of the vertical shafts (large-diameter vertical wells), which are necessary for the subsequent construction of the tunnel´s sections. The different risk situations existing during the construction of the Eastern Drainage Tunnel in the valley of Mexico City (in Spanish, \"Tunel Emisor Oriente\") are analyzed. In order for this 52 km-long and 7.5 m-wide tunnel to carry part of the city’s sewage, 25 shafts must first be built, ranging from 55 to 150 meters deep. The magnitude of such a project implies working in different geographical areas and varied geological strata involving the presence of groundwater, which increases the risks due to possible landslides or flooding during excavation. As digging will occur in different types of soil, varying procedures must be used depending on soil type. Likewise, due to the magnitude of this kind of project, detailed scheduling and planning are required as simultaneous works on different fronts are necessary to meet deadlines. The study mentions that, while projects like these involve high risks for workers, analysis of activities and situations are conducted precisely to demonstrate that such risks can be considerably reduced.","PeriodicalId":369360,"journal":{"name":"Revista Ingeniería de Construcción","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132266716","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. S. Bautista Morales, M. A. Cerna Vasquez, G. Sierra Beltran, S. E. Soto Abanto
Concrete is a material of massive use due to its strength and durability. However, it presents post-concreting anomalies that cause damage to structures, partially or totally, interrupting their service and reducing their designed useful life. The corrective maintenance is an anthropogenic intervention, which demands the use of epoxy additives, resins, tools, equipment and techniques that represent unforeseen costs, labor risks and environmental impact. In response is an anthropogenic, CaCO3 precipitating bacteria into concrete by biomineralization. This article seeks to determine the influence of Lysinibacillus sphaericus on the Compressive strength and self-repair of concrete f'c=350kg/cm2, previously carrying out tests for aggregates and culture media. The preparation of ABC concrete (Bacterial additive for concrete) in doses of 0, 15, 20 and 25ml/m3 of mix, the design of standard concrete with an A/C ratio of 0.43. At 28 days of setting, it reached a Compressive strength of 105% for the standard concrete, and the best strength obtained was by incorporating 25ml/m3, improving by 16% compared to the standard concrete. After 14 days of curing, SEM images showed 69% self-repair of the cracks.
{"title":"Contribution of lysinibacillus sphaericus to crack repairing and compressive strength in durable concrete","authors":"Y. S. Bautista Morales, M. A. Cerna Vasquez, G. Sierra Beltran, S. E. Soto Abanto","doi":"10.7764/ric.00064.21","DOIUrl":"https://doi.org/10.7764/ric.00064.21","url":null,"abstract":"Concrete is a material of massive use due to its strength and durability. However, it presents post-concreting anomalies that cause damage to structures, partially or totally, interrupting their service and reducing their designed useful life. The corrective maintenance is an anthropogenic intervention, which demands the use of epoxy additives, resins, tools, equipment and techniques that represent unforeseen costs, labor risks and environmental impact. In response is an anthropogenic, CaCO3 precipitating bacteria into concrete by biomineralization. This article seeks to determine the influence of Lysinibacillus sphaericus on the Compressive strength and self-repair of concrete f'c=350kg/cm2, previously carrying out tests for aggregates and culture media. The preparation of ABC concrete (Bacterial additive for concrete) in doses of 0, 15, 20 and 25ml/m3 of mix, the design of standard concrete with an A/C ratio of 0.43. At 28 days of setting, it reached a Compressive strength of 105% for the standard concrete, and the best strength obtained was by incorporating 25ml/m3, improving by 16% compared to the standard concrete. After 14 days of curing, SEM images showed 69% self-repair of the cracks.","PeriodicalId":369360,"journal":{"name":"Revista Ingeniería de Construcción","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123277939","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This document discusses the results obtained in the estimation of compression strength through the readings of the rebound hammer and ultrasonic pulse velocity on 9 columns of reinforced concrete. The estimation was performed by applying different SonReb models. The objective of the study is to evaluate which of the applied models is more consistent with the compression resistance value of 27.0 MPa obtained by press-breaking assay, for concretes manufactured with Ordinary Portland Cements P-35 (Type I) of domestic production and aggregates from Cuban quarries. The results obtained showed that the models proposed by RILEM and Tanigawa et al. were closest to the reference value with percentage difference below 4%. This research will allow the performance of non-destructive tests with more accurate results, in the restoration processes of the Historic Center of Havana, Cuba.
{"title":"Evaluation of the compressive strength of a reinforced concrete structure using different SonReb estimation methods","authors":"O. A., Cuetara R., Gonzalez R.","doi":"10.7764/ric.00031.21","DOIUrl":"https://doi.org/10.7764/ric.00031.21","url":null,"abstract":"This document discusses the results obtained in the estimation of compression strength through the readings of the rebound hammer and ultrasonic pulse velocity on 9 columns of reinforced concrete. The estimation was performed by applying different SonReb models. The objective of the study is to evaluate which of the applied models is more consistent with the compression resistance value of 27.0 MPa obtained by press-breaking assay, for concretes manufactured with Ordinary Portland Cements P-35 (Type I) of domestic production and aggregates from Cuban quarries. The results obtained showed that the models proposed by RILEM and Tanigawa et al. were closest to the reference value with percentage difference below 4%. This research will allow the performance of non-destructive tests with more accurate results, in the restoration processes of the Historic Center of Havana, Cuba.","PeriodicalId":369360,"journal":{"name":"Revista Ingeniería de Construcción","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123440591","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}
L. Medina Garcia, S. Betancourt, E. Rodriguez, L. F. Martins Ribeiro, M. Muniz de Farias
waste from the exploitation and processing of nickel laterites in Cuba and Brazil, the work takes as a hypothesis that, if it demonstrates the real possibility of using such waste as a partial substitute for aggregates in the production of asphalt concrete, the negative environmental impact caused by them in the places where they are deposited could be reduced. The objective of the work is, to demonstrate the suitability of mining waste from nickel and cobalt processing dams in the municipalities of Moa and Nicaro, in the province Holguín, Cuba. Such wastes come from Ammonium Carbonate Leaching and Pressurized Acid Leaching processes. The research methodology it has based on taking representative samples from the waste dams, their subsequent physical, chemical and mineralogical characterization, and the characterization of the aggregates and asphalt cement used in the mixtures under study. The design of the asphalt concrete mixtures was carried out using the Marshall method. Subsequently, a comparative analysis was made on the behavior of the asphalt concretes made with limestone and mining waste fillers investigated. It´s demonstrated, from the results of the laboratory tests, that it is possible to manufacture asphalt concretes with the use of mining residues from the processing of nickel laterites from Moa and Nicaro, satisfactorily fulfilling the required technical parameters.
{"title":"Use of mining wastes in asphalt concretes production","authors":"L. Medina Garcia, S. Betancourt, E. Rodriguez, L. F. Martins Ribeiro, M. Muniz de Farias","doi":"10.7764/ric.00071.21","DOIUrl":"https://doi.org/10.7764/ric.00071.21","url":null,"abstract":"waste from the exploitation and processing of nickel laterites in Cuba and Brazil, the work takes as a hypothesis that, if it demonstrates the real possibility of using such waste as a partial substitute for aggregates in the production of asphalt concrete, the negative environmental impact caused by them in the places where they are deposited could be reduced. The objective of the work is, to demonstrate the suitability of mining waste from nickel and cobalt processing dams in the municipalities of Moa and Nicaro, in the province Holguín, Cuba. Such wastes come from Ammonium Carbonate Leaching and Pressurized Acid Leaching processes. The research methodology it has based on taking representative samples from the waste dams, their subsequent physical, chemical and mineralogical characterization, and the characterization of the aggregates and asphalt cement used in the mixtures under study. The design of the asphalt concrete mixtures was carried out using the Marshall method. Subsequently, a comparative analysis was made on the behavior of the asphalt concretes made with limestone and mining waste fillers investigated. It´s demonstrated, from the results of the laboratory tests, that it is possible to manufacture asphalt concretes with the use of mining residues from the processing of nickel laterites from Moa and Nicaro, satisfactorily fulfilling the required technical parameters.","PeriodicalId":369360,"journal":{"name":"Revista Ingeniería de Construcción","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116476821","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. Nieto-Barbosa, R. Cubillos-González, G. Tibério Cardoso, A. Neckel, F. Novegil, I. Cerón Vinasco
Climate change is a progressive phenomenon that, although it can be mitigated, it cannot be stopped. As a consequence, the level of uncertainty is high to propose resilient design strategies to counteract its effects on people's comfort and health. Likewise, a limitation is the collection of information and access to climatic data of each place, so in the present work a cycle of temperature, relative humidity and wind speed measurements was proposed in a case study of social housing in the city of Tunja, Colombia. Thus, the objective of the article is to analyze and validate the reliability of the data collected on site. For this purpose, a descriptive statistical analysis of the information was carried out with tools such as Excel and PSPP version 1.4.1. As a result, it was found that, although the average level of reliability is acceptable, there are data below the minimum value of acceptability. It was concluded that descriptive statistics allows to know the margin of error to which the data are exposed and therefore reduce the uncertainty in the resilient design
气候变化是一个渐进的现象，虽然可以减缓，但无法阻止。因此，提出弹性设计策略以抵消其对人们舒适和健康的影响的不确定性水平很高。同样，每个地方的信息收集和气候数据的获取也是一个限制，因此在目前的工作中，在哥伦比亚Tunja市的社会住房案例研究中提出了温度、相对湿度和风速测量的循环。因此，本文的目的是分析和验证现场收集的数据的可靠性。为此，使用Excel和PSPP version 1.4.1等工具对信息进行描述性统计分析。结果发现，虽然可靠性的平均水平是可接受的，但仍有数据低于可接受的最小值。得出的结论是，描述性统计可以知道数据暴露的误差范围，从而减少弹性设计的不确定性
{"title":"Statistical analysis of climate measurements for resilient design in social housing","authors":"V. Nieto-Barbosa, R. Cubillos-González, G. Tibério Cardoso, A. Neckel, F. Novegil, I. Cerón Vinasco","doi":"10.7764/ric.00047.21","DOIUrl":"https://doi.org/10.7764/ric.00047.21","url":null,"abstract":"Climate change is a progressive phenomenon that, although it can be mitigated, it cannot be stopped. As a consequence, the level of uncertainty is high to propose resilient design strategies to counteract its effects on people's comfort and health. Likewise, a limitation is the collection of information and access to climatic data of each place, so in the present work a cycle of temperature, relative humidity and wind speed measurements was proposed in a case study of social housing in the city of Tunja, Colombia. Thus, the objective of the article is to analyze and validate the reliability of the data collected on site. For this purpose, a descriptive statistical analysis of the information was carried out with tools such as Excel and PSPP version 1.4.1. As a result, it was found that, although the average level of reliability is acceptable, there are data below the minimum value of acceptability. It was concluded that descriptive statistics allows to know the margin of error to which the data are exposed and therefore reduce the uncertainty in the resilient design","PeriodicalId":369360,"journal":{"name":"Revista Ingeniería de Construcción","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115567606","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. A. Rodríguez Moreno, C. Marín-Uribe, Luz Marcela Restrepo Tamayo
The IRI International Regularity Index is a performance indicator that evaluates the functional condition of a pavement structure. Its value is a key input for the management of road assets, allowing to establish the opportune moment for carrying out interventions on the pavement. In addition, it is used to receive road surfaces, assess vehicle operating costs, evaluate the profitability of road projects and establish the cash flow in the financial administration of the project. The IRI data obtained from measurements carried out in the field, feed the deterministic deterioration model that allows future estimations of the indicator and the development of pavement maintenance programs. This research proposes to evaluate in a probabilistic way the model of the IRI International Regularity Index of the HDM-4 program, by assigning probability density functions to the input variables from real data taken in the field. To achieve this objective, a Montecarlo-type simulation model was developed, where roads must be classified by their geographical location, structural capacity of the pavement and traffic intensity expressed in Number of Equivalent Axes. The research results provide the IRI characterized by probability density functions, allowing its estimation from an expected reliability value.
{"title":"PROBABILISTIC MODEL FOR PREDICTION OF INTERNATIONAL ROUGHNESS INDEX BASED ON MONTE CARLO","authors":"M. A. Rodríguez Moreno, C. Marín-Uribe, Luz Marcela Restrepo Tamayo","doi":"10.7764/ric.00021.21","DOIUrl":"https://doi.org/10.7764/ric.00021.21","url":null,"abstract":"The IRI International Regularity Index is a performance indicator that evaluates the functional condition of a pavement structure. Its value is a key input for the management of road assets, allowing to establish the opportune moment for carrying out interventions on the pavement. In addition, it is used to receive road surfaces, assess vehicle operating costs, evaluate the profitability of road projects and establish the cash flow in the financial administration of the project. The IRI data obtained from measurements carried out in the field, feed the deterministic deterioration model that allows future estimations of the indicator and the development of pavement maintenance programs. This research proposes to evaluate in a probabilistic way the model of the IRI International Regularity Index of the HDM-4 program, by assigning probability density functions to the input variables from real data taken in the field. To achieve this objective, a Montecarlo-type simulation model was developed, where roads must be classified by their geographical location, structural capacity of the pavement and traffic intensity expressed in Number of Equivalent Axes. The research results provide the IRI characterized by probability density functions, allowing its estimation from an expected reliability value.","PeriodicalId":369360,"journal":{"name":"Revista Ingeniería de Construcción","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116861540","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}
I. Pizarro Marchena, M.T. Françosob, H. Moraes Treiber, N. de Oliveira Stenico
The rapid deterioration and unsatisfactory performance of highway pavements are also related to the variation and excessive accumulation of moisture in the subgrade and in constituent layers. Hence, moisture control is essential to ensure, in part, the durability and good performance of these types of structures. Ground Penetration Radar (GPR) has proven to be a useful potential alternative for this purpose, given its non-invasive characteristics, preserving the integrity of the site under observation, in addition to the ability to quickly and continuously collecting data. This study aims at evaluating the sensitivity of the GPR to moisture changes and to investigate the influence that calibration models have on predicting moisture content in a compacted tropical soil. Deformed lateritic soil samples were used and subjected to physical properties' characterization and compaction tests. A 1600 MHz antenna GPR was used for data acquisition in a controlled laboratory environment. On the whole, the results showed that GPR is a promising alternative, with both satisfactory accuracy in moisture assessment and sensitivity when monitoring changes in moisture content in compacted soils
{"title":"Assessment and Monitoring of Moisture Content Variation in Compacted Tropical Soil Using GPR Data","authors":"I. Pizarro Marchena, M.T. Françosob, H. Moraes Treiber, N. de Oliveira Stenico","doi":"10.7764/ric.00073.21","DOIUrl":"https://doi.org/10.7764/ric.00073.21","url":null,"abstract":"The rapid deterioration and unsatisfactory performance of highway pavements are also related to the variation and excessive accumulation of moisture in the subgrade and in constituent layers. Hence, moisture control is essential to ensure, in part, the durability and good performance of these types of structures. Ground Penetration Radar (GPR) has proven to be a useful potential alternative for this purpose, given its non-invasive characteristics, preserving the integrity of the site under observation, in addition to the ability to quickly and continuously collecting data. This study aims at evaluating the sensitivity of the GPR to moisture changes and to investigate the influence that calibration models have on predicting moisture content in a compacted tropical soil. Deformed lateritic soil samples were used and subjected to physical properties' characterization and compaction tests. A 1600 MHz antenna GPR was used for data acquisition in a controlled laboratory environment. On the whole, the results showed that GPR is a promising alternative, with both satisfactory accuracy in moisture assessment and sensitivity when monitoring changes in moisture content in compacted soils","PeriodicalId":369360,"journal":{"name":"Revista Ingeniería de Construcción","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115682991","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}
P. N. Ojha, Brijesh Singh, Pranay Singh, Piyush Mittal, Abhishek Singh
Las Normas India IS:456-2000 y Europea EC:02-2004 para el diseño de estructuras de hormigón se limitan al hormigón con resistencia a la compresión de 55 MPa y 90 MPa respectivamente. Para definir los parámetros del bloque de tensión y para el diseño de estructuras de hormigón utilizando hormigón de muy alta resistencia (100 MPa a 150MPa) es necesario contar con un comportamiento tensión-deformación bien definido y, especialmente, con los valores experimentales para la deformación en la tensión máxima y la capacidad de deformación última. El presente estudio intenta satisfacer estas necesidades mediante la evaluación experimental del comportamiento a la tensión-deformación de nueve probetas cilíndricas de hormigón no confinado sometidas a una compresión entre 100 MPa y 150 MPa, en una máquina de ensayos a la compresión servo-controlada (controlada por tensión). Los valores de deformación registrados para el esfuerzo máximo del hormigón de 100 MPa y 150 MPa fueron de alrededor de 3.000 y 3.500 micro deformaciones respectivamente. En comparación con el hormigón normal y de alta resistencia, el tramo ascendente de las curvas para el hormigón de muy alta resistencia es mucho más pronunciado y se aproxima a una trayectoria recta, además coinciden la deformación en el esfuerzo máximo y la deformación última, representando un área insignificante de endurecimiento por deformación posterior al pico. El Transformador Diferencial de Variación Lineal (LVDT) y el compresometro mostraron diferentes deformaciones para la misma probeta y carga. Esto demuestra el rol de la relación de la longitud de calibre utilizada en estos dispositivos de medición de tensión
{"title":"Determinación experimental de las características de tensión-deformación del hormigón de muy alta resistencia no confinado en compresión, incluida la comparación con hormigón de resistencias normal y alta","authors":"P. N. Ojha, Brijesh Singh, Pranay Singh, Piyush Mittal, Abhishek Singh","doi":"10.7764/ric.00046.21","DOIUrl":"https://doi.org/10.7764/ric.00046.21","url":null,"abstract":"Las Normas India IS:456-2000 y Europea EC:02-2004 para el diseño de estructuras de hormigón se limitan al hormigón con resistencia a la compresión de 55 MPa y 90 MPa respectivamente. Para definir los parámetros del bloque de tensión y para el diseño de estructuras de hormigón utilizando hormigón de muy alta resistencia (100 MPa a 150MPa) es necesario contar con un comportamiento tensión-deformación bien definido y, especialmente, con los valores experimentales para la deformación en la tensión máxima y la capacidad de deformación última. El presente estudio intenta satisfacer estas necesidades mediante la evaluación experimental del comportamiento a la tensión-deformación de nueve probetas cilíndricas de hormigón no confinado sometidas a una compresión entre 100 MPa y 150 MPa, en una máquina de ensayos a la compresión servo-controlada (controlada por tensión). Los valores de deformación registrados para el esfuerzo máximo del hormigón de 100 MPa y 150 MPa fueron de alrededor de 3.000 y 3.500 micro deformaciones respectivamente. En comparación con el hormigón normal y de alta resistencia, el tramo ascendente de las curvas para el hormigón de muy alta resistencia es mucho más pronunciado y se aproxima a una trayectoria recta, además coinciden la deformación en el esfuerzo máximo y la deformación última, representando un área insignificante de endurecimiento por deformación posterior al pico. El Transformador Diferencial de Variación Lineal (LVDT) y el compresometro mostraron diferentes deformaciones para la misma probeta y carga. Esto demuestra el rol de la relación de la longitud de calibre utilizada en estos dispositivos de medición de tensión","PeriodicalId":369360,"journal":{"name":"Revista Ingeniería de Construcción","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132503727","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The present analysis was developed by creating a detailed analysis of each article selected for the corroboration of the information and the subsequent comparison between them in order to encourage research of alternative methods of concrete production that will allow the reduction of pollution and will improve the quality and efficiency of concrete. The materials used were nanosilica, pozzolana, and recycled crushed brick that were subjected to laboratory studies with the goal of knowing their properties and of developing mix designs with different content percentages to have a broad study population and achieve representative results. These mix designs were used to create specimens that were tested in different periods to analyze their behavior in various situations. After testing, it was possible to determined that the addition of these materials are effective, in creating concrete of greater strength in the case with the addition of nanosilica, in the case of pozzolana, greater strength can be obtained at a reduced cost due to it being a natural material with various deposits where the material can be obtained in this country and throughout the world, and in the case of the addition of crushed brick, concrete with a similar strength to a conventional type can be obtained at a reduced cost of fabrication due to being a recycled
{"title":"Analysis and comparison of improved concrete with the addition of different types of materials","authors":"D. Benel Ramírez","doi":"10.7764/ric.00067.21","DOIUrl":"https://doi.org/10.7764/ric.00067.21","url":null,"abstract":"The present analysis was developed by creating a detailed analysis of each article selected for the corroboration of the information and the subsequent comparison between them in order to encourage research of alternative methods of concrete production that will allow the reduction of pollution and will improve the quality and efficiency of concrete. The materials used were nanosilica, pozzolana, and recycled crushed brick that were subjected to laboratory studies with the goal of knowing their properties and of developing mix designs with different content percentages to have a broad study population and achieve representative results. These mix designs were used to create specimens that were tested in different periods to analyze their behavior in various situations. After testing, it was possible to determined that the addition of these materials are effective, in creating concrete of greater strength in the case with the addition of nanosilica, in the case of pozzolana, greater strength can be obtained at a reduced cost due to it being a natural material with various deposits where the material can be obtained in this country and throughout the world, and in the case of the addition of crushed brick, concrete with a similar strength to a conventional type can be obtained at a reduced cost of fabrication due to being a recycled","PeriodicalId":369360,"journal":{"name":"Revista Ingeniería de Construcción","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129924685","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}
Pranay Singh, Brijesh Singh, P. Ojha, A. Trivedi, Abhishek Singh, Chirag Pede
The study presents an experimental investigation of the fracture behavior of hardened slag and fly ash-based alkali-activated normal and high-strength geopolymer concrete compared with conventional Ordinary Portland Cement (O.P.C.) based concrete with steel and hybrid fibers. The fracture parameters considered in the experimental investigation include fracture energy, stress intensity factor, energy release rate, and characteristic length. The study concludes that the observed differences in conventional and geopolymer concrete's fracture and mechanical performance agree with the microstructural differences between these concrete systems reported in past literature. The slag-based geopolymer concrete is marginally inferior to the O.P.C.-based concrete, with similar compressive strength in fracture performance. Also, hybrid fiber reinforcement improves the fracture performance of geopolymer concrete more than steel fiber alone. Contrary to geopolymer concrete, steel fiber reinforced conventional concrete is superior to hybrid fiber reinforced conventional concrete in terms of fracture behavior.
{"title":"FRACTURE BEHAVIOR OF SLAG & FLY ASH-BASED GEOPOLYMER CONCRETE IN COMPARISON WITH OPC-BASED CONVENTIONAL CONCRETE, INCLUDING THE EFFECT OF STEEL AND HYBRID FIBERS","authors":"Pranay Singh, Brijesh Singh, P. Ojha, A. Trivedi, Abhishek Singh, Chirag Pede","doi":"10.7764/ric.00075.21","DOIUrl":"https://doi.org/10.7764/ric.00075.21","url":null,"abstract":"The study presents an experimental investigation of the fracture behavior of hardened slag and fly ash-based alkali-activated normal and high-strength geopolymer concrete compared with conventional Ordinary Portland Cement (O.P.C.) based concrete with steel and hybrid fibers. The fracture parameters considered in the experimental investigation include fracture energy, stress intensity factor, energy release rate, and characteristic length. The study concludes that the observed differences in conventional and geopolymer concrete's fracture and mechanical performance agree with the microstructural differences between these concrete systems reported in past literature. The slag-based geopolymer concrete is marginally inferior to the O.P.C.-based concrete, with similar compressive strength in fracture performance. Also, hybrid fiber reinforcement improves the fracture performance of geopolymer concrete more than steel fiber alone. Contrary to geopolymer concrete, steel fiber reinforced conventional concrete is superior to hybrid fiber reinforced conventional concrete in terms of fracture behavior.","PeriodicalId":369360,"journal":{"name":"Revista Ingeniería de Construcción","volume":"26 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131956690","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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