TGA helps is identifying various phases present in the concrete, like portlandite, calcite, C-A-H, C-A-S-H etc. Most often CH content is measured to check the hydration reaction i.e. if CH content has reduced that means it has been used up in the hydration reaction. These various phases break down at different  temperatures to release chemically bound water in case of hydration products and CO2 in case of calcite. This release of chemically bound water and CO2 helps in identifying the various phases present. But to start the experiment, make sure that your sample is free from physically bound water, that is present in pores as it hasn't reacted to form any hydration product. There are various ways to remove physically bound water and to stop further hydration. You can quantify the proportions of the various phases present in your hardened cement paste with the help of derivative curves. Attached is a list of some common phases present in cement paste along with the references, they will be quite handy for phase identification. Also attached are few important research papers where TGA has been used.

http://www.sciencedirect.com/science/article/pii/S0008884610002577

http://www.sciencedirect.com/science/article/pii/S0958946512001400

http://www.sciencedirect.com/science/article/pii/S0169131713004316

http://www.sciencedirect.com/science/article/pii/S0008884610002577

http://link.springer.com/article/10.1007/s10973-006-7712-1#page-1

http://link.springer.com/article/10.1007/s10973-013-3017-3#page-1

Important online book to refer:

http://www.elgi.hu/sites/default/files/files/K%C3%B6nyvtar/Alkalmi_teljes/Fodvari_egyben.pdf

I think the above links and the attached file showing breakdown temperatures of various phases will be of good help.

TGA is mainly employed to investigate the composition of a material and its evolution with temperature. In the case of concrete it can provide a quick way to assess the repartition of the different phases in your sample (which is typically a powder of some grams extracted from your concrete specimen). Plese read this very brief and very instructive introduction:

http://www.google.fr/url?sa=t&rct=j&q=&esrc=s&source=web&cd=8&ved=0CEwQFjAH&url=http%3A%2F%2Fwww.empa.ch%2Fplugin%2Ftemplate%2Fempa%2F*%2F95268&ei=RQBKVJnVCs3aaJrOgZgL&usg=AFQjCNGEqgysGSC8K4uyByXMy3UCUE-opA&bvm=bv.77880786,d.d2s&cad=rja

you can make use of the paper in the below link dear;

ftp://ftp.ecn.purdue.edu/olek/PTanikela/To%20Prof.%20Olek/Data/Calcium%20hydroxide%20TGA/carbonation3.pdf

TGA helps is identifying various phases present in the concrete, like portlandite, calcite, C-A-H, C-A-S-H etc. Most often CH content is measured to check the hydration reaction i.e. if CH content has reduced that means it has been used up in the hydration reaction. These various phases break down at different  temperatures to release chemically bound water in case of hydration products and CO2 in case of calcite. This release of chemically bound water and CO2 helps in identifying the various phases present. But to start the experiment, make sure that your sample is free from physically bound water, that is present in pores as it hasn't reacted to form any hydration product. There are various ways to remove physically bound water and to stop further hydration. You can quantify the proportions of the various phases present in your hardened cement paste with the help of derivative curves. Attached is a list of some common phases present in cement paste along with the references, they will be quite handy for phase identification. Also attached are few important research papers where TGA has been used.

http://www.sciencedirect.com/science/article/pii/S0008884610002577

http://www.sciencedirect.com/science/article/pii/S0958946512001400

http://www.sciencedirect.com/science/article/pii/S0169131713004316

http://www.sciencedirect.com/science/article/pii/S0008884610002577

http://link.springer.com/article/10.1007/s10973-006-7712-1#page-1

http://link.springer.com/article/10.1007/s10973-013-3017-3#page-1

Important online book to refer:

http://www.elgi.hu/sites/default/files/files/K%C3%B6nyvtar/Alkalmi_teljes/Fodvari_egyben.pdf

I think the above links and the attached file showing breakdown temperatures of various phases will be of good help.

https://file.scirp.org/pdf/JMMCE_2014061313211702.pdf

It's very useful informations.

REGARDS