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1. Formosa Mitjans, Joan. Formulaciones de nuevos morteros y cementos especiales basadas en suproductos de magnesio.

Degree: Departament de Ciència dels Materials i Enginyeria Metal·lúrgica, 2012, Universitat de Barcelona

The present thesis is focused in the assessment of some magnesium by-products and their potential reutilization for the formulation of different materials for several construction applications. Therefore, the use of industrial by-products for the development of construction materials highlights the sustainability criteria along with the environmental benefits associated with the reutilization of secondary materials whilst diminishing the extractive activities of natural resources. This thesis has been structured following the same pattern for the experimental work. Thus, the first part details the state of the art in what construction materials concerns as well as some of the construction solutions suggested. These solutions are, on the one hand, included in the development of mortars for passive fire protection (PFP) and, on the other hand, in the formulation of chemical bonded phosphate ceramics (CBPC) as a repairing material for concrete structures. The first part presents an exhaustive chemical, physical and morphological characterization of the by-products used. This preliminary characterization is of great importance in the development of the research because of the industrial origin of these by-products. In the first part of the experimental section, the first of the solutions proposed used two types of magnesium by-products [Low-Grade Magnesium Hydroxide (LG-MH) and Low-Grade Magnesium Carbonate (LG-MC)] in the formulation of PFP mortars, using conventional Portland cement as a binder. Both industrial by-products thermally decompose through endothermic processes in a wide range of temperatures, delaying the time needed to achieve a selected temperature. In this case, the mortars were formulated by using different percentages of both by-products as aggregates, obtaining a material with good thermal and mechanical properties and therefore feasible to be used as a PFP mortar. However, its utilization as a sprayed mortar can be limited because of the high density of the aggregates used. In this sense, the practical applicability can be improved by adding a lightweight aggregate such as vermiculite, without diminishing the rest of the assessed properties. Subsequently, in the second part of the experimental section, the viability of another magnesium by-product [Low-Grade Magnesium Oxide (LG-MgO)] is evaluated. In this case, for the development of chemical bonded phosphate ceramics (CBPC). The assessment was made by determining the mechanical properties of different dosages as well as by measuring the effect of a setting-time retarder additive, boric acid (HB), described in the literature as a good additive for this purpose while improving workability as well. This study has been realized by means of a statistical method, the design of experiments (DoE), with the purpose of obtain mathematical models that justify the interactions between different components in the mix and their effect in the mechanical properties and the setting-time. Moreover, the use of DoE enables the reduction in the number of… Advisors/Committee Members: [email protected] (authoremail), false (authoremailshow), Chimenos Ribera, Josep Ma. (director), Lacasta Palacio, Ana María (codirector), Chimenos Ribera, Josep Ma. (tutor), true (authorsendemail).

Subjects/Keywords: Argamassa; Mortero; Mortar; Ciment; Cemento; Cement; Magnesi; Magnesio; Magnesium; Subproductos industriales; Subproductes industrials; By-products; Prevenció d'incendis; Prevención de incendios; Fire prevention; Ciències Experimentals i Matemàtiques; 69

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APA (6th Edition):

Formosa Mitjans, J. (2012). Formulaciones de nuevos morteros y cementos especiales basadas en suproductos de magnesio. (Thesis). Universitat de Barcelona. Retrieved from http://hdl.handle.net/10803/97207

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Formosa Mitjans, Joan. “Formulaciones de nuevos morteros y cementos especiales basadas en suproductos de magnesio.” 2012. Thesis, Universitat de Barcelona. Accessed December 16, 2019. http://hdl.handle.net/10803/97207.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Formosa Mitjans, Joan. “Formulaciones de nuevos morteros y cementos especiales basadas en suproductos de magnesio.” 2012. Web. 16 Dec 2019.

Vancouver:

Formosa Mitjans J. Formulaciones de nuevos morteros y cementos especiales basadas en suproductos de magnesio. [Internet] [Thesis]. Universitat de Barcelona; 2012. [cited 2019 Dec 16]. Available from: http://hdl.handle.net/10803/97207.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Formosa Mitjans J. Formulaciones de nuevos morteros y cementos especiales basadas en suproductos de magnesio. [Thesis]. Universitat de Barcelona; 2012. Available from: http://hdl.handle.net/10803/97207

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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