Results 31 to 40 of about 81 (74)
Revista Técnica de la Facultad de Ingeniería, 2007 En esta investigación se realizaron mezclas de dos tipos comerciales de policloruro de vinilo con polietilenos lineales de baja densidad (PELBD) y polietilenos de alta densidad (PEAD) puros y funcionalizados. Para la funcionalización de los polietilenos se emplearon diferentes proporciones de iniciador (dicumilperóxido) y 10 ppc de agente ...
Jeanette González +3 more
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Influencia de la inclusión de desecho de PVC sobre el CBR de un material granular tipo subbase
Revista Ingenierías Universidad de Medellín, 2011 En Colombia, los materiales granulares de alta calidad para la conformación de estructuras de pavimentos flexibles son de difícil obtención. En algunas ocasiones el Ingeniero de carreteras debe trabajar con materiales granulares que no cumplen los ...
Edgar Rodríguez Rincón +3 more
doaj
, 2021 For many years, agriculture has been seriously damaged as a result of the uncontrolled use of chemical fertilizers, which damage and wear down the land. Organic agriculture ensures us quality products for our food. Using products such as "biosol" will improve agriculture and, therefore, our diet.
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Revista Facultad Nacional de Agronomía Medellín, 2011 La semilla de vitabosa (Muccuna deeringiana) es una alternativa de fuente proteica para la producción de alimento animal, actualmente en Colombia se obtiene un bajo aprovechamiento de esta semilla por el desconocimiento de su alto potencial nutricional ...
Ángel Francisco Rojas Barahona +1 more
doaj
Awareness of toxic chemicals in entertainment and educational materials
Revista Ciencias Biomédicas, 2012 Introduction: security offered by the materials used to manufacture some tools forrecreational activities and/or educational assistance may not have been adequatelycontrolled.
Fontalvo-Rivera Dilia +6 more
doaj
, 2019 The main problem in designing a petrochemical complex is the cailculation of the optimum size of the plants that comprise it, because plants to be very large or very small generate overruns in the future. This paper presents a mathematical model designed in an Excel spreadsheet that allows to calculate the optimal size of the complex and interrelated ...
Céspedes Morante, Jorge Benigno +3 more
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Ingeniería básica de una planta de producción de policloruro de vinilo (PVC) granular
, 2016 In the present project it is carried out the basic engineering of a production plant of granular polyvinylchloride (PVC) from chlorine and ethylene as raw materials. This plant has an annual production capacity of 55,000 tons per year. The industrial complex in which this process takes place has got two different plants of manufacture: vinyl chloride ...
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Sustitución del agregado fino por Policloruro de Vinilo en el concreto estructural
This article is of an experimental nature, since the behavior of structural concrete was evaluated by adding PVC to replace the fine aggregate by 20%, 30% and 40%. The physical properties of polyvinyl chloride (PVC) and the aggregates (fine and coarse) were determined, obtaining that the specific weight of PVC is 1.14 g/cm3 and that of the fine ...
Cabrera Sanchez, Cleisler +1 more
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, 2019 This research shows the construction and performance analysis of four solar collectors with a recirculation pump and different design parameters. These collectors use water as a primary working fluid. The components of such equipment are two PVC pipe collectors black painted and two M pipe nominal diameter collectors of 0,0127 m (1/2 inch) and 15 m of ...
Calero Tixe, Ernesto Fabián +1 more
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