Determination of the optimum parameters in the high resolution thermogravimetric analysis (HRTG) for cementitious materials
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In this article, the methodology to implementation of high resolution thermogravimetric analysis (HRTG) for construction materials like Portland cement pastes is presented. The aim of this technique is to make easier the identification of the decomposition reactions that frequently are overlapping on conventional thermogravimetric analysis (TG) like is the case of some mineral phases in the cement pastes. The optimum parameters related to sample mass and purge flow gas were established. It is necessary carried out the analysis with high quantity of sample (60 mg in this case) and without purge gas in order to get better results and excellent reproducibility. The tests have average heating rate higher than 3 °C min−1 in the temperature range studied (35–300 °C), showing that the HRTG is not time-expensive technique.
KeywordsHigh resolution thermogravimetry Portland cement Decomposition Variable heating rate
The authors expressed their thanks to ARGOS Cement Company and to COLCIENCIAS (project 20201007768) of Colombia for their economic support for the realization of this research. Also, we would like thank to MICINN (Spanish Ministry of Science and Innovation) and FEDER for the support of the project BIA 2007-63252.
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