Download or read book Empleo de aditivos en la fabricaci n de materiales written by Mikel Zaton Orcasitas and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: De los múltiples materiales de construcción utilizados, el cemento Portland es con diferencia el más u sado . Deb ido a esto, es uno de los materiales sobre los que se ha efectuado un mayor volumen de investigación, tanto en comportamiento mecánico como químico . Sin embargo, estos estudios se centran sobre todo en el cemento portland gris, dejando de lado otro tipo de cemento como el blanco. Por ello, en aras de aumentar el conocimiento existente sobre el comportamiento de cemento blanco, este Trabajo de Fin de Master propone llevar a cabo dos fases experimentales diferenciadas, sobre cómo afecta a una serie de pastas formadas por cemento blanco, la adición de aditivos colorantes y superfluidificantes a base de policarboxilatos. Para ello, por una parte, se realiza una caracterización microestructural a edades de 7 y 28 días, por medio de espectrografía infrarroja y an álisis por difracción de rayos X. Con el objetivo de comprobar si la adición de pigmentos amarillo y verde a dosificaciones de 1%, 3%, 5% y 15% afectan al proceso de hidratación del cemento. De la misma manera a estas pastas se les añadirá un 1% de superf luidificante, junto con una reducción de agua. Por otro lado, se estudiará el efecto que tienen estos aditivos en la trabajabilidad de las pastas, este análisis se realizará estudiando las características reológicas . La composición de las pastas a analiza r, será la misma que en la fase anterior, solo que se añadirá una dosificación de cemento adicional (10%). A modo de conclusiones, se observa, que el uso de estos aditivos no causa cambios significativos en el proceso de hidratación de las pastas, más all á de producir ligeros retrasos en la hidratación de algunos compuestos. En cuanto a la trabajabilidad, se determina que a grandes dosificaciones de aditivos colorantes, la afectación a las propiedades reológicas de las pastas es notable, debido sobre todo a la absorción del agua por parte de los pigmentos.
Download or read book Working Papers written by and published by . This book was released on 1963 with total page 650 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings written by and published by . This book was released on with total page 1336 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book F A O Fisheries Biology Technical Paper written by and published by . This book was released on 1969 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Colecci n Legislativa Agricultura Y Alimentaci n written by and published by . This book was released on 1995 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Machinery Lloyd written by and published by . This book was released on 1950 with total page 2032 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Price and Welfare Effects of The Value Added Tax Evidence from Mexico written by Rodrigo Mariscal and published by International Monetary Fund. This book was released on 2018-11-08 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this paper we analyze the incidence of the VAT and its effects on the income distribution. To identify these effects, we rely on two tax reforms undertaken in Mexico that increased the VAT rate for a group of cities and left the rest unaffected. We compare the inflation rate of the affected cities with the exempted cities before and after the law changed. We find that the effect on prices is limited and conclude that the burden of the tax is indeed shared between producers and consumers. Regarding welfare, we find that the VAT is progressive in both absolute and relative terms to the overall expenditure. Finally, we show that an identical change in the VAT rate when inflation is high and persistent doubles its pass-through to inflation and its welfare loss for the average household.
Download or read book Journal of the American Concrete Institute written by American Concrete Institute and published by . This book was released on 1969 with total page 770 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes the ACT news letter (title varies slightly).
Download or read book Design of Composite Structures Against Fatigue written by Rayner M. Mayer and published by . This book was released on 1996 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Good Practice for the Small scale Production of Bottled Coconut Water written by Rosa Sonya Rolle and published by Food & Agriculture Org.. This book was released on 2007 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nature provides an ideal sterile package for coconut water in the form of the intact coconut. However, on cutting through the coconut, the coconut water is exposed to the elements and rapidly deteriorates. Application of the cold preservation process described in this guide can slow this rapid deterioration while preserving the delicate flavour of the product. In this manner bottled coconut water, when stored at 0 ̊-4 ̊ C, can have a shelf-life of 10 days to three weeks. This guide is designed to serve as a learning resource for micro and small-scale enterprises which bottle coconut water as well as a training resource for extension agents and trainers.
Download or read book Practical Food Rheology written by Ian T. Norton and published by John Wiley & Sons. This book was released on 2010-12-01 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rheology is fundamentally important in food manufacturing in two major senses. Understanding the way in which a substance moves and behaves is essential in order to be able to transport and mix it during processing. Secondly, the rheology of a product dictates much of the consumer experience, e.g. in relation to texture and mouthfeel. This book doesn’t overwhelm the reader with complex mathematical equations but takes a simple and practically-focused approach, interpreting the implications of rheological data for use in different food systems. Through this approach industry-based food developers / rheologists, students, and academics are given clear, concise interpretation of rheological data which directly relates to actual perceived functionality in the food. The functionality may relate to texture, structure and mouthfeel, and may result as a function of temperature, pH, flocculation, concentration effects, and mixing. The interpretative view is based on the principle that the food rheologist will produce a graph, for example of viscosity or gelation profiling, and then have to extract a practical meaning from it. For example, if viscosity falls with time as a function of pH, this knowledge can be used to tell the customer that the viscosity can be followed with just a pH meter and a stopwatch. Rheological measurements have shown that once the pH has dropped 1 unit after 10 minutes, the viscosity has been halved. This is the type of practical and valuable information for customers of the industrial food rheologist which the book will enable readers to access. Key features: A uniquely practical approach to the often difficult science of food rheology Includes chapters introducing the basics of food rheology before moving on to how data can be usefully and easily interpreted by the food scientist Can be used as a teaching aid on academic or industry-based courses
Download or read book Concrete International written by and published by . This book was released on 1987 with total page 1264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pavement Engineering written by Rajib B. Mallick and published by CRC Press. This book was released on 2017-10-16 with total page 1013 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pavement Engineering will cover the entire range of pavement construction, from soil preparation to structural design and life-cycle costing and analysis. It will link the concepts of mix and structural design, while also placing emphasis on pavement evaluation and rehabilitation techniques. State-of-the-art content will introduce the latest concepts and techniques, including ground-penetrating radar and seismic testing. This new edition will be fully updated, and add a new chapter on systems approaches to pavement engineering, with an emphasis on sustainability, as well as all new downloadable models and simulations.
Download or read book EPA 625 1 written by and published by . This book was released on 1976-04 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Calcined Clays for Sustainable Concrete written by Fernando Martirena and published by Springer. This book was released on 2017-10-27 with total page 546 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume focuses on research and practical issues linked to Calcined Clays for Sustainable Concrete. The main topics are geology of clays, hydration and performance of blended system with calcined clays, alkali activated binders, applications in concrete and mortar, durability of concrete under various aggressive conditions, and economic and environmental impacts of the use of calcined clays in cement based materials. This book compiles the different contributions of the 2nd International Conference on Calcined Clays for Sustainable Concrete, which took place in La Habana, December 5th-7th, 2017.The papers update the latest research in their field, carried out since the last conference in 2015. Overall it gives a broad view of research on calcined clays and their application in the field of construction, which will stimulate further research into calcined clays for sustainable concrete.
Download or read book Methods in Lignin Chemistry written by Stephen Y. Lin and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 595 pages. Available in PDF, EPUB and Kindle. Book excerpt: An up-to-date compilation of the theoretical background and practical procedures involved in lignin characterization. Whenever possible, the procedures are presented in sufficient detail to enable the reader to perform the analysis solely by following the step-by-step description. The advantages and limitations of individual methods are discussed and, more importantly, illustrated by typical analytical data in comparison to results obtained from other methods. This handbook serves the need of researchers and other professionals in academia, the pulp and paper industry as well as allied industries. It is equally useful for those with no previous experience in lignin or lignocellulosics.
