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 {2561, title = {Bioactivity enhancement of calcined kaolin geopolymer with CaCl2 treatment}, journal = {ScienceAsia}, volume = {42}, year = {2016}, note = {Pangdaeng, S.; Sata, V.; Aguiar, J.B.; Pacheco-Torgal, F.; Chindaprasirt, Jarin; Chindaprasirt, P.. 2017. "Bioactivity enhancement of calcined kaolin geopolymer with CaCl2\ treatment",\ ScienceAsia\ 42, 6: 407 - 414.
}, month = {2016-12-01 00:00:00}, pages = {407-414}, publisher = {Thailands Natural Science \& Technology development agency}, abstract = {This paper reports that surface treatment with CaCl2 enhances the bioactivity of a calcined kaolin
}, keywords = {aluminosilicate, apatite, Metakaolin, SBF.}, issn = {1513-1874}, doi = {10.2306/scienceasia1513-1874.2016.42.407}, author = {Pangdaeng, S. and Sata, V. and Aguiar, J. B. and Pacheco-Torgal, F. and Chindaprasirt, J. and Chindaprasirt, P.} }
geopolymer. Calcined kaolin, NaOH solution, sodium silicate solution, and heat curing were used to form geopolymer pastes. A soaked-treatment method was applied to the geopolymer samples using CaCl2 solution as the ion exchange agent. The bioactivity of the material was determined by the simulated body fluid (SBF) in vitro testing method.
Scanning electron microscope images showed a dense apatite formation on the treated geopolymer surface after SBF immersion for only 3 days. The CaCl2 treatment promoted compressive strength and enhanced bioactivity by accelerating apatite precipitation and slowing down the rise in pH.
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