A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Ultramarine blue pigment degradation in cementitious materials: a new approach to the phenomenon
The paper analyses the degradation process of commercial ultramarine blue pigments in cementitious materials. For this purpose, two commercial pigments (with and without a protective coating) in different solutions and cement pastes are studied incrementally. The results show that pigment degradation occurs due to an ion exchange phenomenon; during hydration high ion contents are released, calcium and potassium being the most aggressive for the pigment. Calcium distorts the unit cell; between the sodium of the pigment and the potassium in the medium a cation exchange phenomenon takes place. Both processes lead to the diffusion of sulphate and sulphide ions from the pigment to the medium causing loss of colour and the formation of ettringite.
Ultramarine blue pigment degradation in cementitious materials: a new approach to the phenomenon
The paper analyses the degradation process of commercial ultramarine blue pigments in cementitious materials. For this purpose, two commercial pigments (with and without a protective coating) in different solutions and cement pastes are studied incrementally. The results show that pigment degradation occurs due to an ion exchange phenomenon; during hydration high ion contents are released, calcium and potassium being the most aggressive for the pigment. Calcium distorts the unit cell; between the sodium of the pigment and the potassium in the medium a cation exchange phenomenon takes place. Both processes lead to the diffusion of sulphate and sulphide ions from the pigment to the medium causing loss of colour and the formation of ettringite.
Ultramarine blue pigment degradation in cementitious materials: a new approach to the phenomenon
G. Rodríguez de Sensale (author) / S. Chinchón-Payá (author) / V. de Lima (author) / A. Aguado (author) / Ignacio Segura (author)
2024
Article (Journal)
Electronic Resource
Unknown
Metadata by DOAJ is licensed under CC BY-SA 1.0
Ultramarine blue pigment: A non-conventional pozzolan
| Online Contents | 2012
Ultramarine blue from Asturian “hard” kaolins
| Online Contents | 2008
Ultramarine blue from Asturian “hard” kaolins
| Online Contents | 2008
Preparation and characterization of high NIR reflective pigments based in ultramarine blue
| Online Contents | 2016
Fly ash as a potential starting reagent for the synthesis of ultramarine blue
| British Library Online Contents | 2004