Other formats:
BibTeX
LaTeX
RIS
@article{1842604,
author = {Sotiriadis, K. and Hlobil, M. and Viani, A. and Macova, P. and Vopalensky, M.},
article_location = {OXFORD},
article_number = {NOV},
doi = {http://dx.doi.org/10.1016/j.cemconres.2021.106566},
keywords = {Thaumasite sulfate attack; X-ray micro-computed tomography; Solid state NMR spectroscopy; Nanoindentation; Thermodynamic modelling},
language = {eng},
issn = {0008-8846},
journal = {Cement and Concrete Research},
title = {Physical-chemical-mechanical quantitative assessment of the microstructural evolution in Portland-limestone cement pastes exposed to magnesium sulfate attack at low temperature},
url = {https://www.sciencedirect.com/science/article/pii/S0008884621002155?via%3Dihub},
volume = {149},
year = {2021}
}
TY - JOUR
ID - 1842604
AU - Sotiriadis, K. - Hlobil, M. - Viani, A. - Macova, P. - Vopalensky, M.
PY - 2021
TI - Physical-chemical-mechanical quantitative assessment of the microstructural evolution in Portland-limestone cement pastes exposed to magnesium sulfate attack at low temperature
JF - Cement and Concrete Research
VL - 149
IS - NOV
SP - 106566
EP - 106566
PB - Elsevier Ltd
SN - 00088846
KW - Thaumasite sulfate attack
KW - X-ray micro-computed tomography
KW - Solid state NMR spectroscopy
KW - Nanoindentation
KW - Thermodynamic modelling
UR - https://www.sciencedirect.com/science/article/pii/S0008884621002155?via%3Dihub
N2 - The changes in structural integrity and microstructure of Portland-limestone cement pastes were investigated in the course of magnesium sulfate attack at low temperature. A deterioration front, consisting of three distinct layers (brucite, gypsum, leached cement matrix), swelled in time due to the expansive nature of the deterioration products, generating cracks and subsequently detaching from the sound cement matrix, continuously promoting the process. Gypsum and thaumasite characterized the leached matrix, which experienced extensive cross-linking of the aluminosilicate structures, as a result of decalcification and dealumination of the calcium silicate hydrates (C-(A-)S-H), impairing the overall mechanical performance. C-S-H of low packing density was most severely affected by the process, as confirmed by the significant drop in nano-mechanical properties. The increased rate of deterioration with limestone content was tentatively attributed to the prevalent morphology of the C-S-H phase. Results were validated by thermodynamic simulations, indicating that the real systems did not reach equilibrium.
ER -
SOTIRIADIS, K., M. HLOBIL, A. VIANI, P. MACOVA and M. VOPALENSKY. Physical-chemical-mechanical quantitative assessment of the microstructural evolution in Portland-limestone cement pastes exposed to magnesium sulfate attack at low temperature. \textit{Cement and Concrete Research}. OXFORD: Elsevier Ltd, 2021, vol.~149, NOV, p.~106566-106581. ISSN~0008-8846. Available from: https://dx.doi.org/10.1016/j.cemconres.2021.106566.
|
