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Magnesium phosphate cements formulated with a low-grade MgO by-product: physico-mechanical and durability aspects
Formosa, J; Lacasta Palacio, Ana María; Navarro Ezquerra, Antonia; del Valle Zermeño, Ricardo; Niubó Eslava, Maria; Rosell Amigó, Juan Ramón; Chimenos Ribera, Josep Maria
Universitat Politècnica de Catalunya. Departament de Física Aplicada; Universitat Politècnica de Catalunya. Departament de Construccions Arquitectòniques II; Universitat Politècnica de Catalunya. GICITED - Grup interdisciplinar de ciència i tecnologia a l'Edificació
Chemically Bonded Phosphate Ceramics (CBPCs) and, in particular, Magnesium Phosphate Cements (MPCs), show properties very adequate for using as repair mortar for concrete constructions. The obtainment of MPC using MgO-containing by-products as raw materials was proposed by the authors in previous works. There, formulations including boric acid as additive were optimized to obtain good mechanical properties and proper setting times. The current study aims to analyze the viability of the developed formulations to be used as repair mortar. Adhesion to concrete surfaces was evaluated, and in all cases good adhesion strength values were obtained. The durability tests, including freeze/thaw cycles and salts crystallization cycles, have shown an excellent behavior, especially the samples containing the higher amount of boric acid. These promising results indicate that MPC formulated with a low-cost MgO by-product can be an interesting alternative to other repair mortars. In addition to economic benefits in terms of cost of production, the use of by-products has a positive impact on environmental and sustainability aspects.
Peer Reviewed
Àrees temàtiques de la UPC::Edificació::Materials de construcció::Nous materials de construcció
Àrees temàtiques de la UPC::Edificació::Construcció sostenible
Building materials
Low-grade magnesium oxide
Magnesium oxide
Repair mortar
Morter (Material de construcció)
Materials de construcció

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