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
@conference {2120, title = {PERFORMANCE OF FLY ASH-BASED GEOPOLYMER MORTAR}, journal = {European Mortar Summit 2015}, year = {2015}, month = {2015-05-21 00:00:00}, pages = {40-52}, address = {Lisboa}, abstract = {This study has investigated the joint effect of several mix parameters on the properties of
}, keywords = {cost analysis, Energy Efficiency, Foam geopolymers, Mix design, Thermal insulators}, author = {Abdollahnejad, Z. and Felix, T. and Pacheco-Torgal, F. and Aguiar, J. B.} }
foam geopolymers. The mix parameters analysed through a laboratory experiment of 54
different mortar mixes were, sodium silicate/sodium hydroxide mass ratio (2.5, 3.5, 4.5),
activator/binder mass ratio (0.6, 0.8, 1.0), chemical foaming agent type (hydrogen peroxide
(H2O2) and sodium perborate (NaBO3)) and foaming agent mass ratio content (1\%, 2\%, 3\%).
Properties, SEM and FTIR analysis and cost analysis are included. The results show that the
sodium perborate over performs hydrogen peroxide leading to a lower overall thermal
conductibility of foam geopolymers. The use of an activator/binder ratio of 0.8 a sodium
silicate/sodium hydroxide of 2.5 led to the lowest thermal conductivity. Mixtures with a low
thermal conductivity of around 0.1 W/(m.{\textordmasculine}K) and a compressive strength of around 6 MPa
were achieved. The cost analysis show that the foaming agents are responsible for a small
percentage of foam geopolymers total cost (less than 10\%) being that the alkaline activators
are responsible for more than 80\%.
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