My concern is sintered ceramics deliver extremely high modulus(300-400 GPa), organic polymers have very low modulus(3-10 GPa). So, how about the modulus of inorganic polymer based matrix?
Samsur,
You can consider a range from 2-6 GPa. Check in : http://www.sciencedirect.com/science/article/pii/S0927775705004966 or http://www.sciencedirect.com/science/article/pii/S0927775706004493. You need to keep in mind that this values are of unsintered material, which has similar properties of OPC. Davidovits, in his book (Geopolymer - Chemistry and Applications) counts a value higher than 2 GPa.
Hi Marcelo,
Thanks for your reply and the links. Modulus of my materials is little higher than all found from the literature. As you mentioned about sintered material, do you have any experience in changing modulus of geopolymer by some high temperature treatment or post heating?
Hi Samsur,
About this, I've never worked in this approach, but as geopolymer has a similar behavior of ceramics when exposed a heat treatment, I think you can consider this in order to study the effect of heat treatment on the Young Modulus. I suggest you make a TG/DTA test and XRD (different temperatures from TG/DTA test) to observe the phase evolution of your GP from amorphous to crystalline related a temperature exposition (sintering). I believe that is a manner to predict a "correct" heat treatment for your material.
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