Szczegóły publikacji
Opis bibliograficzny
Tracing the early and long-term hydration of fast setting cementitious material (${Ca_7ZrAl_6O_{18}}$) and calcium aluminate cement (CAC) pastes by means of electrochemical impedance spectroscopy and other methods / Dominika MADEJ, Andrzej Kruk // Construction and Building Materials ; ISSN 0950-0618. — 2018 — vol. 164, s. 94–102. — Bibliogr. s. 102, Abstr. — Publikacja dostępna online od: 2018-01-02
Autorzy (2)
- AGHMadej Dominika
- Kruk Andrzej
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 111467 |
|---|---|
| Data dodania do BaDAP | 2018-01-15 |
| Tekst źródłowy | URL |
| DOI | 10.1016/j.conbuildmat.2017.12.208 |
| Rok publikacji | 2018 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Construction and Building Materials |
Abstract
Electrochemical impedance spectroscopy (EIS) has been employed to track the variation in hydration kinetics for fast setting cementitious material (Ca7ZrAl6O18) and standard calcium aluminate cement (CAC). In a pure form, Ca7ZrAl6O18 reacts very violently with water, resulting in an immediate formation of the Ca-Al hydrates which cause an abnormal electrical response of cement pastes at higher frequencies appearing as sharp-edged holes of the resistance Z' versus hydration time. It was found that the same effects were delayed about 45 min for CAC paste. The proposed new electrochemical equivalent model R-1(CPE1(R2W1))W-2, different from a classic one, R-1(CPE1(R2W1)), can better explain phenomena of the early stage hydration process of cementitious compounds. The EIS experimental results were supplemented with both thermal analysis (DTA-TG-EGA) and SEM analysis of changes in the morphology and microstructure of cement paste that allow to track the hydration progress. (C) 2017 Elsevier Ltd. All rights reserved.
