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 |
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| Hauptverfasser: | , |
| Format: | Artikel |
| Sprache: | eng |
| Online-Zugang: | Volltext |
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| Zusammenfassung: | 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. |
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| ISSN: | 0008-8846 1873-3948 |
| DOI: | 10.1016/0008-8846(90)90076-A |