- Tytuł:
- Setting reaction of a olivine-based Mg-phosphate cement
- Autorzy:
-
Pavese, Alessandro
Gobetto, Roberto
Godinho, Jose R.A.
Viani, Alberto
Borfecchia, Elisa
Celikutku, Cem
Jafri, Sadaf Fatima
Bernasconi, Davide
Bordignon, Simone
Wehrung, Quentin
Zárybnická, Lucie
Maximenko, Alexey - Opis:
- The cementitious properties of natural Mg-rich olivine when reacted with a phosphoric acid solution are investigated, as a function of acid concentration and liquid/solid mass ratio. The obtained cements are composed of residual olivine crystals and amorphous silica nanoparticles dispersed in a dense and compact newberyite (MgHPO4∙3H2O) matrix. The latter was mostly formed by packed micrometric tabular crystals, although evidence of the presence of a fraction of amorphous MgHPO4 was also found. Water content in the raw mix was observed to play a pivotal role on the reaction pathway, either promoting porosity or hindering the crystallization of the products. Up to 57 % of olivine reactivity, whose dissolution was promoted by the curing temperature (60 °C) and low pH, was achieved. All in all, these results indicate that the industrial mineral olivine may serve a viable source of Mg for the production of phosphate cements.
- Dostawca treści:
- Repozytorium Uniwersytetu Jagiellońskiego
Artykuł