Effect of gamma irradiation on creep properties of cement paste analogues

Elena Tajuelo Rodriguez, Yann Le Pape, Thomas M. Rosseel, William A. Hunnicutt

Research output: Contribution to conferencePaperpeer-review

Abstract

Calcium Silicate Hydrates with Ca/Si = 0.75, 1, and 1.33 were synthesized and irradiated to an absorbed dose of ~ 25 MGy. Chemical analyses and nanoindentation tests were performed on irradiated and control samples. Structural analyses showed no loss of interlayer water with irradiation as per the position of the basal peak in XRD patterns. The basal distance was ~12Å, ~11Å, and ~10Å for Ca/Si = 0.75, 1, and 1.33 respectively. Thermal analyses indicated a similar weight loss percentage (16-17%) at 1000°C for both control and irradiated samples, suggesting no change in total water content with irradiation. Nanoindentation tests for creep response showed less creep for irradiated than control samples.

Original languageEnglish
Pages602-607
Number of pages6
StatePublished - 2019
Event19th International Conference on Environmental Degradation of Materials in Nuclear Power Systems - Water Reactors, EnvDeg 2019 - Boston, United States
Duration: Aug 18 2019Aug 22 2019

Conference

Conference19th International Conference on Environmental Degradation of Materials in Nuclear Power Systems - Water Reactors, EnvDeg 2019
Country/TerritoryUnited States
CityBoston
Period08/18/1908/22/19

Funding

This research was supported by the US DOE, Office of Nuclear Energy, Light Water Reactor Sustainability (LWRS) Program, under contract DE-AC05-00OR22725 with UT-Battelle, LLC, via ORNL. The authors acknowledge Zach Burns, ORNL, for his assistance in the design of the capsules used in the gamma irradiation, and Maryla Wasiolek and Don Hanson, GIF, SNL, for providing photographs of the irradiator and cooling setup, and performing the irradiation experiment.

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