Details

Autor(en) / Beteiligte

• Le Pape, Y.
• Sanahuja, J.
• Alsaid, M. H. F.

Titel

Irradiation-induced damage in concrete-forming aggregates: revisiting literature data through micromechanics

Ist Teil von

• Materials and structures, 2020-06, Vol.53 (3), Article 62

Ort / Verlag

Dordrecht: Springer Netherlands

Erscheinungsjahr

2020

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The radiation-induced volumetric expansion (RIVE) of aggregate-forming minerals causes damage in concrete exposed to high levels of fast neutrons fluence ( > ∼ 10 19 n cm - 2 at kinetics energy above 0.1 MeV). Historical post-irradiation RIVE and Young’s modulus data obtained in test reactors were revisited using a polycrystalline homogenization model (self-consistent scheme) accounting for the aggregates’ minerals content and the formation of voids/cracks during irradiation. It was found that the formation of extra voids/cracks can contribute to the aggregate expansion more substantially than the cumulated expansions of aggregate-forming minerals. The rate of void creation appears to be inversely correlated to the silica content, although aggregates of higher silicate contents exhibit higher RIVEs. The loss of Young’s modulus decreases exponentially with the aggregates’ expansion. At a comparable RIVE level, the relative loss of modulus is more significant in aggregates of higher silica content.