TY - JOUR
T1 - The effect of concentration on the structure and crystallinity of a cementitious waste form for caustic wastes
AU - Chung, Chul Woo
AU - Turo, Laura A.
AU - Ryan, Joseph V.
AU - Johnson, Bradley R.
AU - McCloy, John S.
PY - 2013
Y1 - 2013
N2 - Cement-based waste forms have long been considered economical technologies for disposal of various types of waste. A solidified cementitious waste form, Cast Stone, has been identified to immobilize the radioactive secondary waste from vitrification processes. In this work, Cast Stone was considered for a Na-based caustic liquid waste, and its physical properties were analyzed as a function of liquid waste loading up to 2 M Na. Differences in crystallinity (phase composition), microstructure, mesostructure (pore size distribution and surface area), and macrostructure (density and compressive strength) were investigated using various analytical techniques, in order to assess the suitability of Cast Stone as a chemically durable waste. It was found that the concentration of secondary waste simulant (caustic waste) had little effect on the relevant engineering properties of Cast Stone, showing that Cast Stone could be an effective and tolerant waste form for a wide range of concentrations of high sodium waste.
AB - Cement-based waste forms have long been considered economical technologies for disposal of various types of waste. A solidified cementitious waste form, Cast Stone, has been identified to immobilize the radioactive secondary waste from vitrification processes. In this work, Cast Stone was considered for a Na-based caustic liquid waste, and its physical properties were analyzed as a function of liquid waste loading up to 2 M Na. Differences in crystallinity (phase composition), microstructure, mesostructure (pore size distribution and surface area), and macrostructure (density and compressive strength) were investigated using various analytical techniques, in order to assess the suitability of Cast Stone as a chemically durable waste. It was found that the concentration of secondary waste simulant (caustic waste) had little effect on the relevant engineering properties of Cast Stone, showing that Cast Stone could be an effective and tolerant waste form for a wide range of concentrations of high sodium waste.
UR - http://www.scopus.com/inward/record.url?scp=84875453197&partnerID=8YFLogxK
U2 - 10.1016/j.jnucmat.2013.02.035
DO - 10.1016/j.jnucmat.2013.02.035
M3 - Article
AN - SCOPUS:84875453197
SN - 0022-3115
VL - 437
SP - 332
EP - 340
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
IS - 1-3
ER -