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Titel:

Gypsum formation mechanisms and their contribution to crystallisation pressure in sulfate resistant hardened cement pastes during early external sulfate attack at low sulfate concentrations

Dokumenttyp:
Zeitschriftenaufsatz
Autor(en):
Wagner, Matthias; Decker, Marco; Kunther, Wolfgang; Machner, Alisa; Beddoe, Robin E.; Heisig, Anne; Heinz, Detlef
Abstract:
Gypsum formation mechanisms during external sulfate attack were studied on Portland cements of various C3A content exposed to low sulfate concentrations. Though ettringite is acknowledged as the main expansive phase during external sulfate attack, the simultaneous formation of gypsum can cause expansion of laboratory samples prepared with SR Portland cement. The comparison of free expansion, expansion pressure, sulfur distribution, microstructure and thermodynamic modelling was used to identify...     »
Zeitschriftentitel:
Cement and Concrete Research
Jahr:
2023
Band / Volume:
168
Seitenangaben Beitrag:
107138
Volltext / DOI:
doi:10.1016/j.cemconres.2023.107138
Verlag / Institution:
Elsevier BV
E-ISSN:
0008-8846
Publikationsdatum:
01.06.2023
TUM Einrichtung:
Professur für Mineral Construction Materials
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