H2 production under gamma irradiation of a calcium aluminate cement: An experimental study on both cement pastes and its stable hydrates

The objective of this paper is to investigate the use calcium aluminate cements as alternative within context nuclear waste stabilization by solidification. Using an external 60Co source, effect γ-radiation on H2 gas production one cement-based materials (cement “Ciment Fondu”) and its stable hydrates, was studied. amount produced these cement pastes found be much lower (up five times less) than that Portland containing same water, especially in low range water ratios (W/C ≤ 0.4) where essentially engaged hydrates. two major hydrates Ciment Fondu, gibbsite AH3 katoite hydrogarnet C3AH6, very compared with main other (Portland cement, Calcium Sulfo-Aluminate Magnesium Phosphate cements). type hydroxyl groups and/or molecular influences significantly production. Thus, nature hydrate a key parameter aim optimizing matrices respect under irradiation. XRD analysis shows crystal structures are preserved up high doses electron irradiation (3 GGy). This makes (CAC) potential good candidates for conditioning from point view their stability