Download or read book Empleo de aditivos para el concreto en el Per written by Jorge Zegarra Pellanne and published by . This book was released on 1986 with total page 119 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Gua para el empleo de aditivos para el concreto written by Nueva Serie IMCYC n and published by . This book was released on 1974 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Gu a para el empleo de aditivos en el concreto written by ACI Committe 212 (Estados Unidos) and published by . This book was released on 1976 with total page 83 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Gu a para el empleo de aditivos en el concreto written by and published by . This book was released on 1974 with total page 83 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Gu a para el empleo de aditivos en el concreto written by and published by . This book was released on 1978 with total page 83 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Guia para el empleo de aditivos en el concreto written by American Concrete Institute and published by . This book was released on 1974 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Guia para el empleo de aditivos en el concreto written by and published by . This book was released on 1976 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Technology of Concrete when Pozzolans Slags and Chemical Admixtures are Used written by and published by . This book was released on 1985 with total page 686 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Agrindex written by and published by . This book was released on 1992 with total page 814 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Qui n es qui n written by and published by . This book was released on 1992 with total page 930 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Coal Tar Creosote written by C. Melber and published by WHO. This book was released on 2004 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: On cover: IPCS International Programme on Chemical Safety. Published under the joint sponsorship of the United Nations Environment Programme, the International Labour Organization and the World Health Organization, and produced within the framework of the Inter-organization Programme for the Sound Management of Chemicals (IOMC)
Download or read book Self Healing Phenomena in Cement Based Materials written by Mario de Rooij and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 279 pages. Available in PDF, EPUB and Kindle. Book excerpt: Self-healing materials are man-made materials which have the built-in capability to repair damage. Failure in materials is often caused by the occurrence of small microcracks throughout the material. In self-healing materials phenomena are triggered to counteract these microcracks. These processes are ideally triggered by the occurrence of damage itself. Thus far, the self-healing capacity of cement-based materials has been considered as something "extra". This could be called passive self-healing, since it was not a designed feature of the material, but an inherent property of it. Centuries-old buildings have been said to have survived these centuries because of the inherent self-healing capacity of the binders used for cementing building blocks together. In this State-of-the-Art Report a closer look is taken at self-healing phenomena in cement-based materials. It is shown what options are available to design for this effect rather than have it occur as a "coincidental extra".
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 Superplasticizers written by Vangipuram Seshachar Ramachandran and published by Natural Resources Canada, Canada Centre for Mineral and Energy Technology. This book was released on 1997 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book has been prepared with the aim of integrating information about the chemistry and application of concrete superplasticizers in a manner relevant to concrete engineers and technologists. The opening chapter introduces basic aspects of concrete science as background for what follows. Chapters 2-4 discuss the chemical synthesis of superplasticizers, methods used to characterize those chemicals, and techniques for evaluation of their effect in cementitious systems. Subsequent chapters cover: the influence of superplasticizers on hydration of cement materials; rheology of cementitious systems; issues related to the mode of action and compatibility of superplasticizers; the effect of superplasticizers on fresh concrete; mechanical properties and durability of concrete; innovative applications of superplasticizers in concrete; superplasticizer dispensing, specifications, and standards; patents related to superplasticizers; and current and future trends in the use of superplasticizers in concrete.
Download or read book Concrete International written by and published by . This book was released on 1992 with total page 1198 pages. Available in PDF, EPUB and Kindle. Book excerpt:
