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Chemically bonded cements formulated with by-products of magnesium oxide
Formosa Mitjans, Joan; Aranda, Ma; Chimenos Ribera, Josep Maria; Rosell Amigó, Juan Ramón; Ginés, O.; Fernández Renna, Ana Inés
Universitat Politècnica de Catalunya. Departament de Construccions Arquitectòniques II; Universitat Politècnica de Catalunya. NOLIN - Física No-Lineal i Sistemes Fora de l´Equilibri; Universitat Politècnica de Catalunya. GICITED - Grup interdisciplinar de ciència i tecnologia a l'Edificació
The casting of magnesium and potassium phosphate (KMgPO4•6H2O; K-struvite) cements becomes possible after the aqueous reaction between magnesium oxide and potassium dihydrogen phosphate. This reaction is quite exothermic and allows the resulting paste setting in just few minutes. Those cements, when are cast with magnesium oxides of high purity, are used to retain and encapsulate special residues and as repairing concrete mortar, as it is described in the bibliography. However, it is also possible formulate those cements using low grade magnesium oxides, which cost are nearly 10 or 15 times cheaper than those of high grade. The aim of this work is to evaluate the possibility of using low grade magnesium oxides (˜70% MgO), obtained from the calcinations process of natural magnesites, for KMgPO4•6H2O cement casting. The research and selection of the best formulation for obtaining that cement will be done also from the point of view of their mechanical properties as for their setting time.
Peer Reviewed
Àrees temàtiques de la UPC::Enginyeria dels materials::Assaig de materials::Assaigs químics
Cement
Materials--Testing
Phosphate cement
K-struvite
chemical cement
magnesium and potassium phosphate
Ciment
Assaigs de materials
Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/publishedVersion
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