Phase transformations of water in hardened cement paste a low-temperature DSC investigation

Phase transformations of water in hardened cement paste a low-temperature DSC investigation

Differential scanning calorimety (DSC) was used to investigate the properties of gel pore water in hardened cement paste (hcp). By comparing heating and cooling thermograms using a step scanning procedure evidence was found for new phase transitions due to structured water. The new transitions occur...

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Veröffentlicht in:Cement and concrete research 1990-03, Vol.20 (2), p.236-242
Hauptverfasser: Beddoe, R.E., Setzer, M.J.
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Setzer, M.J.
description Differential scanning calorimety (DSC) was used to investigate the properties of gel pore water in hardened cement paste (hcp). By comparing heating and cooling thermograms using a step scanning procedure evidence was found for new phase transitions due to structured water. The new transitions occur at −31 °C and −24 °C during cooling. On drying the transitions vanish near relative humidities of 70% and 88%, respectively. An approximately cylindrical shape was deduced for the gel pores. The sorption hysteresis was also investigated.
doi_str_mv 10.1016/0008-8846(90)90076-A
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title Phase transformations of water in hardened cement paste a low-temperature DSC investigation
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