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
@JournalArticle {2788, title = {Evaluation of Hydration of Cement Pastes Containing High Volume of Mineral Additions}, journal = {European Journal of Environmental and Civil Engineering}, year = {2017}, month = {2017-05-22 00:00:00}, pages = {1-17}, publisher = {Taylor \& Francis}, abstract = {The use of mineral additions is a common practice in the production of cementitious materials. Recently proposed usage of high amounts of cement replaced by mineral additions requires the study of the chemical interaction of these additions with the cement. This study intends to evaluate, by means of TG/DTG techniques, XRD and compressive strength, the effect of high volume of mineral additions in the hydration of cementitious pastes. Pastes with 50{\textendash}70\% of cement replaced by mineral addition and with different combinations of fly ash\ and metakaolin were evaluated, two pastes without mineral addition and two other pastes with lime addition. Results showed TG/DTG and XRD techniques are more suitable for evaluating kinetics of reactions of hydration, making it possible to quantify the substantial reduction in the levels of portlandite in hydrated pastes containing high volumes of mineral additions. These techniques allowed to find important differences in the evaluation of calcium hydroxide, because its morphology can change in the presence of additions. Also showed that it is possible to achieve, enhanced or even high compressive strength (50{\textendash}80\ MPa) in concretes containing reduced cement contents. As well as more resistance against harmful agents and carbonation attack.
}, keywords = {cement hydration, Mineral additions, Portland cement, TG/DTG, XRD}, issn = {19648189, 21167214}, doi = {10.1080/19648189.2017.1327892}, url = {http://www.tandfonline.com/doi/full/10.1080/19648189.2017.1327892}, author = {Anjos, M. A. S. and Reis, R. and Cam{\~o}es, A. and Duarte, F. and Jesus, C.} }
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 25 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