TY  - JOUR
AU  - Ferrand, Karine
AU  - Klinkenberg, Martina
AU  - Caes, Sébastien
AU  - Poonoosamy, Jenna
AU  - Van Renterghem, Wouter
AU  - Barthel, Juri
AU  - Lemmens, Karel
AU  - Bosbach, Dirk
AU  - Brandt, Felix
TI  - Dissolution Kinetics of International Simple Glass and Formation of Secondary Phases at Very High Surface Area to Solution Ratio in Young Cement Water
JO  - Materials
VL  - 14
IS  - 5
SN  - 1996-1944
CY  - Basel
PB  - MDPI
M1  - FZJ-2021-03742
SP  - 1254 -
PY  - 2021
AB  - Static dissolution experiments were carried out with the reference International Simple Glass under hyperalkaline pH at 70 °C and very high SA/V ratio. Three aspects of glass dissolution behavior were investigated, (1) the rate drop regime and the residual rate (stage II), (2) the formation of secondary phases including thermodynamic aspects, and (3) the microstructure of the interface of altered glass and secondary phases. A very low residual rate of 6 × 10−6 g/m2d was determined based on boron release, which was several orders of magnitude lower than the initial rate established between the start of the experiments and the first sampling on day 59. The presence of a porous layer with a thickness varying between 80 nm and 250 nm and a pore size between 10 nm and 50 nm was observed. CSH phases with a low Ca/Si ratio of 0.3–0.4 and zeolites were also visible at the surface of the altered glass grains, but no glass alteration resumption occurred, probably due to an important pH decrease already at day 59. Thermodynamic calculations assuming congruent glass dissolution and precipitation of the dissolved aqueous species confirmed the precipitation of CSH phases and zeolites
LB  - PUB:(DE-HGF)16
C6  - 33800843
UR  - <Go to ISI:>//WOS:000628377300001
DO  - DOI:10.3390/ma14051254
UR  - https://juser.fz-juelich.de/record/897342
ER  -