Design of polymeric binders to improve the properties of magnesium phosphate cement

0541635 - ÚTAM 2022 RIV GB eng J - Journal Article
Zárybnická, Lucie - Machotová, J. - Mácová, Petra - Machová, Dita - Viani, Alberto
Design of polymeric binders to improve the properties of magnesium phosphate cement.
Construction and Building Materials. Roč. 290, July (2021), č. článku 123202. ISSN 0950-0618. E-ISSN 1879-0526
R&D Projects: GA ČR(CZ) GA20-01280S
Institutional support: RVO:68378297
Keywords : magnesium phosphate cement * acrylic latex * self-crosslinking * emulsion polymerization
OECD category: Materials engineering
Impact factor: 7.693, year: 2021
Method of publishing: Limited access
https://doi.org/10.1016/j.conbuildmat.2021.123202

In the context of reducing the environmental impact of cement manufacturing, magnesium phosphate cements raise interest as alternative binders in construction, for immobilization of wastes, and recycling purposes. Their use in applications is somehow limited by short setting time, brittleness and low water resistance, this calls for the use of additives. Two polymer additives were designed adopting emulsion polymerization, an environmentally friendly solution to make available polymers as water-based latex dispersions. The composites containing 5 wt% of polymer, exhibited better elastic behaviour, with up to twice the toughness of the reference sample and of a sample produced with commercial styrenebutadiene rubber latex. Moreover, the additives reduced the apparent porosity, promoted phosphate crystallization, modified the size and shape of crystals, and effectively retarded the reaction, extending working time. The acrylic emulsion developing keto-hydrazide self-crosslinking reaction imparted better properties to the composite, thanks to the synergistic effect with the MPC setting reaction.
Permanent Link: http://hdl.handle.net/11104/0319165