dc.contributor
Universitat Politècnica de Catalunya. Departament d'Enginyeria Civil i Ambiental
dc.contributor
Universitat Politècnica de Catalunya. EC - Enginyeria de la Construcció
dc.contributor.author
Salvador, Renan
dc.contributor.author
Pialarissi Cavalaro, Sergio Henrique
dc.contributor.author
Cincotto, Maria Alba
dc.contributor.author
Domingues de Figueiredo, Antonio
dc.identifier
Salvador, R., Pialarissi Cavalaro, S.H., Cincotto, M., de Figueiredo, A.D. Parameters controlling early age hydration of cement pastes containing accelerators for sprayed concrete. "Cement and concrete research", Novembre 2016, vol. 89, p. 230-248.
dc.identifier
https://hdl.handle.net/2117/90036
dc.identifier
10.1016/j.cemconres.2016.09.002
dc.description.abstract
The objective of this work is to parametrize the early age hydration behavior of accelerated cement pastes based on the chemical properties of cement and accelerators. Eight cements, three alkali-free and one alkaline accelerators were evaluated. Isothermal calorimetry, in situ XRD and SEM imaging were performed to characterize kinetics and mechanisms of hydration and the microstructure development. The reactivity of all accelerators is directly proportional to their aluminum and sulfate concentrations and to the amount and solubility of the setting regulator contained in cement. Alite hydration is enhanced if a proper C3A/SO3 ratio (between 0.67 and 0.90) remains after accelerator addition and if limestone filler is employed, because undersulfated C3A reactions are avoided. Combinations of compatible materials are recommended to enhance the performance of the matrix and to prevent an undesirable hydration behavior and its consequences in mechanical strength development.
dc.description.abstract
Peer Reviewed
dc.description.abstract
Postprint (author's final draft)
dc.format
application/pdf
dc.relation
http://www.sciencedirect.com/science/article/pii/S0008884616305026
dc.rights
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subject
Àrees temàtiques de la UPC::Enginyeria civil::Materials i estructures::Materials i estructures de formigó
dc.subject
Sprayed concrete
dc.subject
Formigó gunitat
dc.title
Parameters controlling early age hydration of cement pastes containing accelerators for sprayed concrete
