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Title:

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

Document type:
Zeitschriftenaufsatz
Author(s):
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...     »
Journal title:
Cement and Concrete Research
Year:
2023
Journal volume:
168
Pages contribution:
107138
Fulltext / DOI:
doi:10.1016/j.cemconres.2023.107138
Publisher:
Elsevier BV
E-ISSN:
0008-8846
Date of publication:
01.06.2023
TUM Institution:
Professur für Mineral Construction Materials
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