Centro de Território, Ambiente e Construção
Escola de Engenharia da Universidade do Minho
Campus de Azurém
4800-058 Guimarães, Portugal
Phone: + 351 253 510 200 (517 206)
Fax: + 351 253 510 217
Email: geral@ctac.uminho.pt
@inbook {3072, title = {Using Thymolphthalein for Accelerated Carbonation Testing of High Volume Fly Ash Cementitious Blends}, booktitle = {Service Life and Durability of Reinforced Concrete Structures}, year = {2019}, month = {2019-09-01 00:00:00}, pages = {17-30}, publisher = {Springer, Cham}, organization = {Springer, Cham}, edition = {RILEM}, abstract = {Phenolphthalein is the most common pH indicator used to measure the
}, keywords = {Carbonation, Thymolphthalein}, isbn = {978-3-319-90235-7}, issn = {2211-0844}, doi = {10.1007/978-3-319-90236-4}, url = {https://link.springer.com/chapter/10.1007/978-3-319-90236-4_2}, author = {Reis, R. C. and Cam{\~o}es, A. and Ribeiro, M.} }
carbonation depth of cementitious materials. It is simple and quick to use, but according
to some authors, is not an appropriate tool. Moreover, this substance is in the
candidate list as a substance of very high concern by European Chemicals Agency.
This article discusses the use of thymolphthalein rather than phenolphthalein. Accelerated
carbonation tests were performed on cement mortars and high volume fly ash
mortars. Once this kind of mixtures has low carbonation resistance additional alkalinity
was provided by adding hydrated lime during its fresh mixture, and by curing
the samples immersed in a calcium hydroxide solution. The results showed that the
best indicator was the thymolphthalein, mainly for blends with lower carbonation
depth. It was also checked\ that adding alkalinity can be useful for increasing the
carbonation resistance.
The Centre for Territory, Environment and Construction (CTAC) is a research unit of the School of Engineering of University of Minho (UMinho), recognised by the “FCT – Fundação para a Ciência e Tecnologia” (Foundation for Science and Technology), associated to the Department of Civil Engineering (DEC), with whom it shares resources and namely human resources.
Currently CTAC aggregates 24 researchers holding a PhD of which 20 are faculty professors of the Civil Engineering Department. Read more
Centro de Território, Ambiente e Construção
Escola de Engenharia da Universidade do Minho
Campus de Azurém
4800-058 Guimarães, Portugal
Phone: + 351 253 510 200 (517 206)
Fax: + 351 253 510 217
Email: geral@ctac.uminho.pt