caa a22 4500 463224051 CHVBK 20180405153221.0 cr unu---uuuuu 170326e20070501xx s 000 0 eng 10.1007/s10853-006-0533-6 doi (NATIONALLICENCE)springer-10.1007/s10853-006-0533-6 Influence of curing schedule on the integrity of geopolymers [Elektronische Daten] [D. Perera, O. Uchida, E. Vance, K. Finnie] The curing at ambient and controlled relative humidity (RH) with mild heating (40-60°C) of a metakaolinite-based geopolymer of molar ratios Si/Al and Na/Al of 2 and 1 respectively was studied. To obtain these geopolymers in a crack-free state, rapid drying during curing should be avoided. Curing at a lower RH (e.g. 30%) is preferable to that at a higher RH (e.g. 70%). Curing in an RH oven does not offer any advantage over curing at ambient followed by mild heating (40-60°C) in sealed containers. The compositions of the geopolymers were then varied somewhat to see the effect on open porosity for the same curing schedule. The compositions with Si/Al=1.86 and Na/Al<0.8 had an increased tendency to crack, probably due to the larger water loss during curing. The lowest open porosity of <1% was obtained for a geopolymer of composition Si/Al=2.14 and Na/Al=0.87, but this developed some cracks after 1year. However, the geopolymer of composition, Si/Al=2, Na/Al=1, on which most of the work was carried out when cured correctly did not crack even after 1year. Springer Science+Business Media, LLC, 2006 Perera D. Australian Nuclear science and Technology Organisation, Private Mail Bag 1, 2234, Menai, NSW, Australia aut Uchida O. Australian Nuclear science and Technology Organisation, Private Mail Bag 1, 2234, Menai, NSW, Australia aut Vance E. Australian Nuclear science and Technology Organisation, Private Mail Bag 1, 2234, Menai, NSW, Australia aut Finnie K. Australian Nuclear science and Technology Organisation, Private Mail Bag 1, 2234, Menai, NSW, Australia aut Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/9(2007-05-01), 3099-3106 0022-2461 42:9<3099 2007 42 10853 https://doi.org/10.1007/s10853-006-0533-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-006-0533-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Perera D. Australian Nuclear science and Technology Organisation, Private Mail Bag 1, 2234, Menai, NSW, Australia aut NATIONALLICENCE 700 1- Uchida O. Australian Nuclear science and Technology Organisation, Private Mail Bag 1, 2234, Menai, NSW, Australia aut NATIONALLICENCE 700 1- Vance E. Australian Nuclear science and Technology Organisation, Private Mail Bag 1, 2234, Menai, NSW, Australia aut NATIONALLICENCE 700 1- Finnie K. Australian Nuclear science and Technology Organisation, Private Mail Bag 1, 2234, Menai, NSW, Australia aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/9(2007-05-01), 3099-3106 0022-2461 42:9<3099 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer