Description
Chemical interaction of cement paste with sulphate from the groundwater, incl. pyrite oxidation products, has an impact on the calcium aluminate phases of the hydrated cement system (ettringite and calcium aluminate mono-sulphate (AFm) formation). Due to volume increase the concrete may be disrupted. However, volume changes are not expected to be significant.
OPA Category
Category as used in the OPA assessment
ILW backfill and liner
OPA Number
Number as used in the OPA assessment
2.07
Waste Relevance
Classes of waste to which this FEP is relevant
ILW
NEA V1 IFEP Reference(s)
Related IFEPs from the NEA V1 IFEP list from 1999
2.1.09, 2.1.07