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Literatura académica sobre el tema "Porous concrete"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 17 de junio de 2025

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Artículos de revistas sobre el tema "Porous concrete"

Fedyuk, R., A. Baranov, Yu Ilinsky, and Afonso Rangel Garcez de Azevedo. "PERFORMANCES OF HIGH POROUS CELLULAR CONCRETE." Construction Materials and Products 3, no. 5 (2020): 5–14. http://dx.doi.org/10.34031/2618-7183-2020-3-5-5-14.

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The widespread use of cellular concrete for enclosing structures forces researchers to develop ways to im-prove their performance and durability. Compositions of aerated and foam concrete with the use of waste heat power engineering have been developed. The optimal formulation ratios have been identified that con-tribute to the creation of a rigid interpore matrix and water-repellent pore protection. The regularities of the synthesis of aerated concrete and foam concrete were established, which consist in optimizing the processes of structure formation through the use of a polymineral cement-ash binder and a pore-forming agent. The mix composition intensifies the process of hydration of the system, which leads to the synthesis of a poly-mineral highly porous heterodispersed matrix. The increased activity and granulometry of aluminosilicates predetermine an increase in the number of contacts and mechanical adhesion between particles during com-paction, strengthening the framework of the interpore partitions. The mechanism of the influence of the composition of the concrete mix on the microstructure of the composite is established. The calculated sound insulation of airborne noise shows sufficient characteristics for using aerated concrete blocks as enclosing structures. One of the main advantages of aerated concrete is its low thermal conductivity, which is especial-ly important from the point of view of ensuring the energy efficiency of buildings and structures. Even in spite of the high values of open porosity of the developed aerated concrete, the rigid frame makes it possible to achieve almost 2 times higher frost resistance characteristics than that of the reference specimen

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Okamoto, T., and S. Naka. "Porous Concrete." Concrete Journal 54, no. 5 (2016): 542–47. http://dx.doi.org/10.3151/coj.54.5_542.

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McCain, George N., and Mandar M. Dewoolkar. "Porous Concrete Pavements." Transportation Research Record: Journal of the Transportation Research Board 2164, no. 1 (2010): 66–75. http://dx.doi.org/10.3141/2164-09.

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Skripkiūnas, Gintautas, and Vitoldas Vaitkevičius. "THE INFLUENCE OF COARSE AGGREGATE CONCENTRATION ON THE STRENGTH OF CONCRETE AND ON THE POROSITY OF CONCRETE MORTAR/STAMBIOJO UŽPILDO KONCENTRACIJOS ĮTAKA BETONO STIPRUMUI IR SKIEDININĖS DALIES PORINGUMUI." JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT 7, no. 6 (2001): 446–52. http://dx.doi.org/10.3846/13921525.2001.10531771.

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The results of experiments dealing with coarse aggregate concentration influence on the concrete strength and the structure of hardened cement paste and mortar of concrete are presented in the paper. Experiments were performed on concrete with dense coarse aggregate (crushed granite) which strength is more than strength of mortar and lightweight porous aggregate (expanded clay aggregate) with strength less than that of mortar. Physical and mechanical properties of concrete with dense coarse aggregate are presented in Table 1 and the concretes with the porous coarse aggregate in Table 2. The decrease of entrained air content with the increase of coarse aggregate concentration ϕσt were determined both for concretes with dense and porous coarse aggregate. The entrained air has a significant effect on concrete strength—1% of entrained air decreases the strength of concrete about 5% [11]. The influence of the coarse aggregate concentration on the compressive strength of concrete with the constant air content is presented in Figs 3 and 4. With the increase of coarse aggregate concentration the concrete strength decreases when the entrained air content in concrete is constant. The main reasons of the concrete strength reduction are the stress concentration and structural defects near the coarse aggregate. Coarse aggregate affects the structure of mortar. Dense coarse aggregate has negligible water absorption and does not change water content in mortar of concrete, and capillary porosity of mortar remains constant when the concentration of dense coarse aggregate ϕ st increases (Fig 5). Porous coarse aggregate (expanded clay aggregate) has large water absorption (more than 16%), therefore water content in mortar of concrete is reduced and capillary porosity of mortar is significantly reduced when the concentration of porous coarse aggregate ϕ st increases (Fig 5). The entrained air content in mortar with both dense and porous coarse aggregate decreases inverse proportionally to coarse aggregate concentration ϕ st (Fig 6). The investigations have shown that suitable selection of properties and volumetric concentration of coarse aggregate can reduce stress concentration in concrete and increase the concrete strength.

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Demchyna, B. H., Yu Ye Famuliak, and Kh B. Demchyna. "Modeling of porous concrete elements under load." Selected Scientific Papers - Journal of Civil Engineering 12, no. 2 (2017): 79–86. http://dx.doi.org/10.1515/sspjce-2017-0022.

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Abstract It is known that cell concretes are almost immediately destroyed under load, having reached certain critical stresses. Such kind of destruction is called a “catastrophic failure”. Process of crack formation is one of the main factors, influencing process of concrete destruction. Modern theory of crack formation is mainly based on the Griffith theory of destruction. However, the mentioned theory does not completely correspond to the structure of cell concrete with its cell structure, because the theory is intended for a solid body. The article presents one of the possible variants of modelling of the structure of cell concrete and gives some assumptions concerning the process of crack formation in such hollow, not solid environment.

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Plecas, Ilija. "Mathematical modelling of transport phenomena in concrete porous media." Epitoanyag - Journal of Silicate Based and Composite Materials 61, no. 1 (2009): 11–13. http://dx.doi.org/10.14382/epitoanyag-jsbcm.2009.3.

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Elizondo-Martinez, Eduardo-Javier, Piergiorgio Tataranni, Jorge Rodriguez-Hernandez, and Daniel Castro-Fresno. "Physical and Mechanical Characterization of Sustainable and Innovative Porous Concrete for Urban Pavements Containing Metakaolin." Sustainability 12, no. 10 (2020): 4243. http://dx.doi.org/10.3390/su12104243.

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Alternative materials to replace cement in pavements have recently been widely studied with the purpose of decreasing the environmental impacts that the construction industry generates. In this context, the implementation of sustainable urban drainage systems has grown, especially with porous pavements, with the intention to reduce water and environmental impacts. In the present investigation, the addition of alternative materials to minimize the use of cement in porous concrete pavements is evaluated. Starting from a partial substitution of Portland cement with metakaolin, experimental geopolymer concretes were produced with metakaolin and waste basalt powder according to several dosages. Two sets of mixtures were analyzed to evaluate the Porous Concrete Design (PCD) methodology for porous concrete mixtures with alternative materials. A deep analysis was proposed for the evaluation of the mechanical and volumetric properties of the mixtures. Results demonstrated that replacing 5% of cement with metakaolin can increase both permeability and indirect tensile strength. Geopolymer mixtures can achieve permeability significantly higher than the traditional porous concrete, but this decreases their indirect tensile strength. However, considering the promising results, an adjustment in the mix design of the geopolymer mixtures could increase their mechanical properties without negatively affecting the porosity, making these materials a suitable alternative to traditional porous cement concrete, and a solution to be used in urban pavements.

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Lian, Chun Qi, Zhu Ge Yan, and Simon Beecham. "Evaluation of Permeability of Porous Concrete." Advanced Materials Research 295-297 (July 2011): 873–79. http://dx.doi.org/10.4028/www.scientific.net/amr.295-297.873.

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One of the most important characteristics of porous concrete is the ability to capture and transport water. The permeability of porous concrete is therefore needs to be evaluated. This paper will investigate various methods for testing the permeability of porous concrete and compares the different results from falling head and constant head tests. The hydraulic theories were then applied into the analysis to determine the permeability of the porous concrete samples.

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Ramadhansyah, Putra Jaya, Mohd Yusak Mohd Ibrahim, Hainin Mohd Rosli, and Mohd Haziman Wan Ibrahim. "A Review of Porous Concrete Pavement: Applications and Engineering Properties." Applied Mechanics and Materials 554 (June 2014): 37–41. http://dx.doi.org/10.4028/www.scientific.net/amm.554.37.

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Porous concrete technology has been used since 1970s in various parts of the United State as an option to complex drainage systems and water retention areas.Porous concrete pavements have become popular as an effective stormwater management device to control the stormwater runoff in pavement. The objective of this paper is to study a pre-review on Porous concrete pavement and it previous laboratory study. From the literature, it was found that, the strength of the porous concrete pavementstill need to improve. To improve the strength of the porous concrete, various additive have been study as a part of porous concrete mix and yetthe optimum condition to produce good porous concrete still not been established. From the previous study, it was found that to prepare the porous concrete laboratory specimen, the use of standard Proctor hammer (2.5kg) and Pneumatic press (70 kPa compaction effort) resulted in the closest properties to the field porous concrete.

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Cahya, E. N., R. Haribowo, and E. Arifi. "Inclined porous concrete surface impact on infiltration using recycled concrete aggregate." IOP Conference Series: Earth and Environmental Science 930, no. 1 (2021): 012100. http://dx.doi.org/10.1088/1755-1315/930/1/012100.

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Abstract Predicting the infiltration rate on inclined surfaces is a pending case, especially when compared to rain intensity. The inclined surface has less ability to generate ponding, leading to higher runoff and higher erosion rates. In the rainy season, on the highway with a very steep slope, erosion usually occurs and becomes very dangerous. By using porous concrete, it is expected to receive higher infiltration and less runoff. This study aimed to determine the impact of the inclined surface of porous concrete on infiltration capacity. The research was conducted using both natural coarse aggregate and recycled coarse aggregate made from concrete waste. The infiltration and permeability test were conducted using porous concrete slabs under 0 to 30% inclined surface. It was shown that the infiltration rate is getting lower as the surface is being steeper. It was also shown that porous concrete made from recycled coarse aggregate has higher performance on permeability and infiltration rate compared to porous concrete made from the natural one.

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Tesis sobre el tema "Porous concrete"

Curtis, Kyle. "The Application of Porous Concrete." The University of Arizona, 2016. http://hdl.handle.net/10150/623460.

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Sustainable Built Environments Senior Capstone Project
The southwest region of the United States is stressed for potable water and needs to positively utilize its current water resource. With the urban environment being mostly made up of concrete, it is now crucial to assess its development and application. The concrete used today is a mixture of cement, water and aggregates and is not permeable. The non-permeable property of common concrete prevents natural water absorption by the earth and greatly inhibits water to percolate back into the local water table. As concrete, has developed, porous concrete has been discovered. Porous concrete or pervious pavement is made in the same way that concrete is made with cement, aggregate, and water, but the aggregate used in porous concrete creates pores that allow water to pass through. By allowing water to pass through concrete, urban development will result in greater ground water recharge. As global warming intensifies weather patterns across the planet, Tucson, Arizona will experience heavier rainfall seasons. As the world’s climate changes, Tucson will experience heavier monsoon rain fall events. With heavier rain fall events urban flooding will become more of an issue. Grey infrastructure is needed to manage flooding caused by heavy rain fall. Porous concrete can be used as an effective way to manage storm water. This capstone has undertaken an extensive range of literature reviews to identify where porous concrete can be used for storm water harvesting. The literature reviews range from climate change to the benefits of storm water harvesting. Porous concrete allows storm water to infiltrate through it and back into the local aquifer and directs storm water into retention ponds for treatment and reuse. Porous concrete is a low impact development (LID) building material, which will turn urban development into Sustainable development. Porous concrete if used correctly for storm water harvesting can reduce potable water stress, reduce pollutants found in local waters, and reduce the strain on current storm drains. The required maintenance associated with porous concrete is minimal and not costly, therefore will be only briefly explained throughout this research. While porous concrete has a wide range of benefits ranging from water percolation to the reduction of the heat island effect, this paper will focus on its use as a means of storm water harvesting.

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Roberts, Ian David. "Droplet evaporation from porous surfaces." Thesis, University of Manchester, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.294978.

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Virgiliis, Afonso Luís Corrêa de. "Procedimentos de projeto e execução de pavimentos permeáveis visando retenção e amortecimento de picos de cheias." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/3/3138/tde-08092010-122549/.

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O trabalho tem por objetivo apresentar procedimentos de projeto e execução de obras de pavimentos permeáveis visando sua aplicação prática como medidas compensatórias de drenagem urbana com a finalidade de retenção e amortecimento de picos de enchentes em cidades densamente urbanizadas. Os procedimentos propostos se baseiam na experiência adquirida para a implementação de dois tipos de pavimentos permeáveis; um com revestimento constituído de blocos intertravados de concreto e outro com revestimento de concreto asfáltico poroso, conhecido como camada porosa de atrito. Para subsidiar o trabalho uma pista experimental foi construída como área de estacionamento nas dependências do Centro Tecnológico de Hidráulica CTH na Universidade de São Paulo onde foi realizado o experimento. O local do estacionamento atua como um reservatório subsuperficial de águas pluviais sendo que sua estrutura, constituída de agregados granulares, abriga no interior de seus vazios a água infiltrada pelas camadas do pavimento. Recomenda-se, após os estudos, que os procedimentos e seqüências de atividades de projeto e execução de obras de pavimentos permeáveis sejam contemplados pelo poder público e privado como solução alternativa em diferentes empreendimentos urbanos como grandes áreas públicas ou particulares, estacionamentos, parques, quadras esportivas, passeios, calçamentos e ruas de pouca solicitação de tráfego entre outros.
The present work intents to show design and built procedures, of porous pavements; by paying attention on its practical appliances as compensatory option in urban drainage with purpose to retaining rainfall water by storage, reducing downstream flooding in cities with great urban density. The procedures here proposed are based in the know how acquired for the construction of two kinds of porous pavements: one built with interlocked concrete blocks and the other built with porous asphalt. In order to aid the present work, an experimental field was built as parking area inside the propriety of CTH Centro Tecnologico de Hidraulica in State University of Sao Paulo where the tests and experiments were made. The parking area is a reservoir structure where rain water is stored inside courses of aggregates. The storage volume is in the void space between particles of material that comes by infiltration trough the pavement layer. The commendation, after the studies, is that procedures and activities of design and build of porous pavements could be observed by government and private sector as alternative solution in many kinds of urban projects such as large public and private lots, parking areas sport fields side walks and streets, with low capacity of traffic loads, and so forth.

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Foster, Shiloh. "Porous Concrete: Proposal of UA Study and Best Practices." The University of Arizona, 2016. http://hdl.handle.net/10150/608602.

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Sustainable Built Environments Senior Capstone Project
Porous concrete pavements have been used in the eastern United States to effectively manage storm water when used as an alternative to impervious surfaces. This paper reviewed a wide body of available literature and research to examine their potential to reduce runoff at the University of Arizona. This study found that their unique structural properties enable them to infiltrate and detain large volumes of water in a stone sub-base below the slab, filtering out many street related contaminants without the need to install additional infrastructure. Porous concrete surfaces may support green development in the southwest where water is both a sensitive and valuable resource. However, long-term structural durability, clogging potential due to dust, and maintenance requirements have yet to be fully understood in this region. This paper then summarizes critical factors that affect the performance of porous concrete and proposes a framework for future study to be conducted by the University of Arizona in a way that would reduce runoff to major campus roads, contribute to a better understanding of sustainable storm water management in the southwest, and demonstrate leadership in environmental stewardship.

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Goede, William Gunter. "Pervious concrete investigation into structural performance and evaluation of the applicability of existing thickness design methods /." Pullman, Wash. : Washington State University, 2009. http://www.dissertations.wsu.edu/Thesis/Fall2009/w_goede_112409.pdf.

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Thesis (M.S. in civil engineering)--Washington State University, December 2009.
Title from PDF title page (viewed on Jan. 22, 2010). "Department of Civil and Environmental Engineering." Includes bibliographical references (p. 98-102).

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Mulligan, Ann Marie. "Attainable Compressive Strength of Pervious Concrete Paving Systems." Master's thesis, University of Central Florida, 2005. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/2630.

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The pervious concrete system and its corresponding strength are as important as its permeability characteristics. The strength of the system not only relies on the compressive strength of the pervious concrete but also on the strength of the soil beneath it for support. Previous studies indicate that pervious concrete has lower compressive strength capabilities than conventional concrete and will only support light traffic loadings. This thesis investigated prior studies on the compressive strength on pervious concrete as it relates to water-cement ratio, aggregate-cement ratio, aggregate size, and compaction and compare those results with results obtained in laboratory experiments conducted on samples of pervious concrete cylinders created for this purpose. The loadings and types of vehicles these systems can withstand will also be examined as well as the design of appropriate thickness levels for the pavement. Since voids are supposed to reduce the strength of concrete 1% for every 5% voids(Klieger, 2003), the goal is to find a balance between water, aggregate, and cement in order to increase strength and permeability, two characteristics which tend to counteract one another. In this study, also determined are appropriate traffic loads and volumes so that the pervious concrete is able to maintain its structural integrity. The end result of this research will be a recommendation as to the water-cement ratio, the aggregate-cement ratio, aggregate size, and compaction necessary to maximize compressive strength without having detrimental effects on the permeability of the pervious concrete system. This research confirms that pervious concrete does in fact provide a lower compressive strength than that of conventional concrete; compressive strengths in acceptable mixtures only reached 1700 psi. Extremely high permeability rates were achieved in most all mixtures regardless of the compressive strength. Analysis of traffic loadings reinforce the fact that pervious concrete cannot be subjected to large numbers of heavy vehicle loadings over time although pervious concrete would be able to sustain low volumes of heavy loads if designed properly. Calculations of pavement thickness levels indicate these levels are dependent on the compressive strength of the concrete, the quality of the subgrade beneath the pavement, as well as vehicle volumes and loadings.
M.S.C.E.
Department of Civil and Environmental Engineering
Engineering and Computer Science
Civil Engineering

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Aguirre, B., M. Anchiraico, J. Rodríguez, and F. García. "Sustainable urban pavement for cities affected by El Niño using porous concrete." IOP Publishing Ltd, 2021. http://hdl.handle.net/10757/655955.

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The El Niño phenomenon is caused by the change in atmospheric pressures, which produce the accumulation of hot surface waters on the eastern flank of the Pacific Ocean; causing intense rainfall that runs over the surface affecting the urban drainage of the city due to the lack of a permeable pavement; porous concrete allows infiltration of surface water runoff through its pores. The present investigation evaluates porous concrete in the range of w/c relationships of 0.30 and 0.32; the results indicate that the compressive strength, flexural strength and permeability coefficient increase; and that the surface runoff, cost, water footprint and carbon footprint are lower than conventional concrete.

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Hade, James D. "Determining the runoff coefficient for compressed concrete unit pavements in situ." Virtual Press, 1987. http://liblink.bsu.edu/uhtbin/catkey/483966.

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Roads and parking lots make up the largest percentage of manmade impervious surfaces in the world. Large amounts of runoff contribute to wastewater treatment plant overloads and subsequent raw sewage discharges. A high runoff rate reduces the groundwater recharge potential, causes stream bed erosion, and flooding which frequently results in the loss of life, property and /or crop damage. High runoff rates also cause surface pollutants to be washed into storm sewers, streams and other waterways, causing damage to aquatic plant and animal life. Pourous pavements are one of the tools which environmental engineers, landscape architects and planners may use in design for stormwater management to help reduce runoff.Previous investigators have assumed that compressed concrete block unit pavements, on a sand bed and gravel base, with sand joints, become impermeable over time. This study sought to determine the runoff coefficient for a trafficked pavement that has been in use for ten months. A Variable Intensity Portable Rain Simulator was used in 120 tests on nine plots from a pedestrian plaza and three plots from an intersection of a neighborhood outlet and a city street, paved with Unidecor (or Cobble-) Pavers. Three rainfall intensity ranges were tested for each pavement type; 0 to 7 millimeters per hour, 7 to 15 millimeters per hour, and 15 to 30 millimeters per hour. For storms with an intensity level of twelve millimeters per hour average, the runoff coefficient on the plaza was significantly different than that for the intersection. Additionally, it was found that for the three intensity ranges tested the runoff was significantly different for each range.Ball State UniversityMuncie, IN 47306

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Dry, Carolyn. "Design of systems for time delayed activated internal release of chemicals in concrete from porous fibers, aggregates of prills, to improve durability /." This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-05222007-091330/.

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Neithalath, Narayanan. "Development and characterization of acoustically efficient cementitious materials." Skokie, Ill. : Portland Cement Association, 2004. http://www.cement.org/bookstore/profile.asp?itemid=SN2924.

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Libros sobre el tema "Porous concrete"

Collins, R. J. Porous aggregates in concrete. CRC, 2004.

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R, Schaefer Vernon, Iowa. Dept. of Transportation., and National Concrete Pavement Technology Center., eds. Mix design development for pervious concrete in cold weather climates. Center for Transportation Research and Education, Iowa State University, 2006.

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Hamlin, Jennings, Kropp Jörg, Scrivener Karen, North Atlantic Treaty Organization. Scientific Affairs Division., and NATO Advanced Research Workshop on the Modelling of Microstructure and its Potential for Studying Transport Properties and Durability (1994 : Saint-Rémy-lès-Chevreuse, France), eds. The modelling of microstructure and its potential for studying transport properties and durability. Kluwer Academic Publishers, 1996.

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Vidal Molina, Paula, ed. Dilemas del Trabajo y las políticas laborales: entre Neoliberalismos y Buen Vivir en América Latina en el Siglo XXI. Ariadna Ediciones, 2021. http://dx.doi.org/10.26448/ae9789566095309.13.

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En estos tiempos contradictorios, este libro colectivo es imprescindible porque reúne una serie de autoras y autores de diversos países –Argentina, Brasil, Bolivia, Chile, Ecuador, España, México- que analizan y reflexionan acerca de los procesos socioeconómicos y políticos desarrollados en Nuestra América en las últimas décadas. El hilo común de la perspectiva de análisis está puesto en los procesos e inspirado en la crítica de la economía política, cuestión fundamental a la hora de pensar la sociedad actual y realizar la crítica radical a la sociedad capitalista, teniendo en consideración las realidades concretas de algunos de los países de América Latina.

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Lozano Medina, Andrés, and Guadalupe Oliver Téllez. Juventud y educación : una relación precaria. Universidad Pedagógica Nacional, 2017. http://dx.doi.org/10.47380/upnmx.libalm0000039.

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El tema de este trabajo se refiere a la juventud como el eje articulador entre la educación, las políticas educativas y los procesos escolares. En este libro se presentan varios trabajos de investigación que se discutieron a partir de las categorías: jóvenes, jóvenes y jóvenes estudiantes. Es parte de los estudios de la política educativa como un contexto general, porque todo el trabajo se está reuniendo, en el análisis de las acciones concretas de atención o falta de atención hacia esta población. Los temas particulares son el mercado laboral, el ausentismo y la apropiación de tecnologías de la información, la comunicación y las emociones.

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Vallejo Zambrano, Cristhian Rubén, Iván Marcelo Sornoza Palma, Erick Manuel Cantos Santana, et al. El síndrome Burnout riesgo laboral de nuestro tiempo. Mawil Publicaciones de Ecuador, 2021, 2022. http://dx.doi.org/10.26820/978-9942-602-04-6.

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La salud de los trabajadores es una preocupación que se ha plasmado en políticas y legislaciones en todo el mundo, a instancias de organizaciones internacionales tales como la Organización Internacional del Trabajo (OIT), la Organización Mundial de la Salud (OMS) y la propia Organización de las Naciones Unidas, que entienden el bienestar de los productores de los bienes materiales y espirituales de la Humanidad como parte específica de los Derechos Humanos. El resguardo de la salud de esta manera, los trabajadores es responsabilidad de los Estados y de las empresas y organizaciones donde se desarrollan las actividades productivas y de servicios, así como el deber de los sindicatos el de velar y luchar porque ese derecho que de garantizado y se lleve efectivamente a la práctica, mediante normas, legislaciones y políticas concretas. Las organizaciones internacionales, especialmente la OIT y la OMS, han definido claramente las condiciones de ese bienestar y han identificado las patologías frente a las cuales pueden desarrollarse planes de prevención, identificación y tratamientos adecuados. Entre esas enfermedades se encuentra el síndrome de Burnout.

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Manrique Ramírez, Faustina. Una experiencia guía de la investigación en la Maestría en Contabilidad. Universidad Libre sede principal, 2020. http://dx.doi.org/10.18041/978-958-5578-41-8.

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Este documento ofrece una reflexión enfocada en el acto de investigar, en el que, antes del mundo de las cosas, está lo humano, la subjetividad, la conciencia, lo social, lo cultural, porque a partir del sujeto se construye la objetividad de las cosas y del mundo. El libro surge tras la experiencia, en los últimos cinco años, de escuchar y observar a los estudiantes de la Maestría en Contabilidad, que en su mayoría son contadores públicos y tienen temor cuando piensan en investigar. Ellos manifiestan su falta de experiencia en este campo, y por eso mismo encuentran obstáculos para desarrollar un trabajo de investigación. Este texto busca que los estudiantes, como contadores públicos, se den cuenta de que sus miedos son normales, que no son solo de ellos, y que el sistema educativo sigue todavía un modelo conductista y poco crítico. De este modo, se procura demostrarles que ellos hacen un esfuerzo por cambiar en este campo la historia en la Contaduría Pública, por medio de aportes disciplinares y transdisciplinares en los cuales presentan alternativas de solución a problemáticas concretas de la realidad. El resultado de este escrito es una guía de investigación fundamentada en la experiencia de orientar a contadores públicos para vivir la investigación y no aprender investigación.

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Capítulos de libros sobre el tema "Porous concrete"

Hall, Christopher, and William D. Hoff. "Porous materials." In Water Transport in Brick, Stone and Concrete, 3rd ed. CRC Press, 2021. http://dx.doi.org/10.1201/9780429352744-1.

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Hall, Christopher, and William D. Hoff. "Water in porous materials." In Water Transport in Brick, Stone and Concrete, 3rd ed. CRC Press, 2021. http://dx.doi.org/10.1201/9780429352744-2.

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Hall, Christopher, and William D. Hoff. "Flow in porous materials." In Water Transport in Brick, Stone and Concrete, 3rd ed. CRC Press, 2021. http://dx.doi.org/10.1201/9780429352744-3.

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Mandal, Saroj, and Bibekananda Mandal. "Development of Porous Concrete with Recycled Aggregate." In Recent Technologies in Sustainable Materials Engineering. Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-34249-4_3.

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Müller, Hannah, Christoph Nething, Anja Schalk, Daria Kovaleva, Oliver Gericke, and Werner Sobek. "Porous Spatial Concrete Structures Generated Using Frozen Sand Formwork." In Springer Proceedings in Mathematics & Statistics. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-46804-0_9.

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Joohari, Ilya, Mohd Izzat Joohari, and Ang Ai Leen. "Material Properties of Porous Concrete Using Recycled Coarse Aggregates." In Regional Conference on Science, Technology and Social Sciences (RCSTSS 2016). Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0074-5_27.

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Kresin, Christopher, William James, and David Elrick. "Observations of Infiltration Through Clogged Porous Concrete Block Pavers." In Advances in Modeling the Management of Stormwater Impacts. CRC Press, 2021. http://dx.doi.org/10.1201/9781003208945-10.

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Shimizu, Goro. "Recycling of Crushed Bricks from Demolished Buildings as Cement-Based Porous Materials." In Environmental Ecology and Technology of Concrete. Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-983-0.301.

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Zhuang, Y., and H. L. Xiao. "Combination of Porous Ecological Concrete and Geocell in Riverbank Protection." In Environmental Science and Engineering. Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-2221-1_26.

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Zhuang, Y., and H. L. Xiao. "Experimental Study on Mix Proportioning Methodology for Porous Ecological Concrete." In Environmental Science and Engineering. Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-2221-1_32.

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Actas de conferencias sobre el tema "Porous concrete"

"Durability of Porous Concrete." In SP-212: Sixth CANMET/ACI: Durability of Concrete. American Concrete Institute, 2003. http://dx.doi.org/10.14359/12720.

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"Properties of High-Strength Porous Concrete." In SP-179: Fourth CANMET/ACI/JCI Conference: Advances in Concrete Technology. American Concrete Institute, 1998. http://dx.doi.org/10.14359/6038.

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Varlakov, Andrey P., Alexandr V. Germanov, Sergey A. Dmitriev, Alexandr S. Barinov, and Artur E. Arustamov. "Cementation of Problem LRW Using Porous Concrete." In ASME 2009 12th International Conference on Environmental Remediation and Radioactive Waste Management. ASMEDC, 2009. http://dx.doi.org/10.1115/icem2009-16139.

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Resumen

Problem wastes are defined as those wastes which are solidified with difficulty, have poor volumetric efficiencies or produce an unsatisfactory product, demands much of radiation safety of technological process. These wastes are organic liquid (oil, solvents, extractants, scintillation cocktail and others), high containing surface-active substances, subacid aqueous saline and high containing alpha nuclides LRW. The technology consists in as follows. First of all, porous concrete is prepared by a special mixer and placed into a container. The container is the standard drum 100 or 200 l. At the age-hardening of concrete not less than 28 days, when main hydration processes are finished, problem LRW is pumped into the pore space of the porous concrete matrix through previously positioned the special feed tube. The hardened porous concrete matrix is impregnated with problem liquid radioactive wastes which penetrate into the pore space. Depending on kind of LRW contents of waste in the final product has made 50–65% vol. The final conditioning product has meet requirements. LRW is fixed very reliable inside pores of the cement matrix.

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Horiguchi, T. "Development of controlled short-life porous concrete." In RILEM International Symposium on Environment-Conscious Materials and Systems for Sustainable Development. RILEM Publications SARL, 2005. http://dx.doi.org/10.1617/2912143640.036.

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Liao, Min-Chih, and Yen-Yu Lin. "Engineering Properties of Cold-Mix Porous Asphalt Concrete." In Eighth International Conference on Maintenance and Rehabilitation of Pavements. Research Publishing Services, 2016. http://dx.doi.org/10.3850/978-981-11-0449-7-186-cd.

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Ginting, Arusmalem, Prasetya Adi, and Yosep Prasetyo. "Porous Concrete using White Cement as Binding Agent." In International Conference on Applied Science, Engineering and Social Science. SCITEPRESS - Science and Technology Publications, 2019. http://dx.doi.org/10.5220/0009200900160020.

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"Porous Concrete for Underwater Organisms in a River." In SP-179: Fourth CANMET/ACI/JCI Conference: Advances in Concrete Technology. American Concrete Institute, 1998. http://dx.doi.org/10.14359/6078.

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"Properties and Application of Environmentally Friendly Porous Concrete." In SP-179: Fourth CANMET/ACI/JCI Conference: Advances in Concrete Technology. American Concrete Institute, 1998. http://dx.doi.org/10.14359/6035.

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Etse, Guillermo, Diego Said Schicchi, Antonio Caggiano, and Marianela Ripani. "Discontinuos Approach for Meso-Scale Modeling of Porous Materials Like Concrete Under High Temperatures." In 9th International Conference on Fracture Mechanics of Concrete and Concrete Structures. IA-FraMCoS, 2016. http://dx.doi.org/10.21012/fc9.301.

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Athanasiadis, Ignatios, Simon Wheeler, and Peter Grassl. "Modelling the Time Dependence of Transport Properties of Porous Materials." In 10th International Conference on Mechanics and Physics of Creep, Shrinkage, and Durability of Concrete and Concrete Structures. American Society of Civil Engineers, 2015. http://dx.doi.org/10.1061/9780784479346.043.

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