Physical-chemical-mechanical quantitative assessment of the
microstructural evolution in Portland-limestone cement pastes
exposed to magnesium sulfate attack at low temperature

J 2021

Physical-chemical-mechanical quantitative assessment of the microstructural evolution in Portland-limestone cement pastes exposed to magnesium sulfate attack at low temperature

SOTIRIADIS, K., M. HLOBIL, A. VIANI, P. MACOVA, M. VOPALENSKY et. al.

Basic information

Original name

Physical-chemical-mechanical quantitative assessment of the microstructural evolution in Portland-limestone cement pastes exposed to magnesium sulfate attack at low temperature

Authors

SOTIRIADIS, K., M. HLOBIL, A. VIANI, P. MACOVA and M. VOPALENSKY

Edition

Cement and Concrete Research, OXFORD, Elsevier Ltd, 2021, 0008-8846

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

20500 2.5 Materials engineering

Country of publisher

United Kingdom of Great Britain and Northern Ireland

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

URL

Impact factor

Impact factor: 11.958

RIV identification code

RIV/00216224:14740/21:00124437

Organization unit

Central European Institute of Technology

DOI

http://dx.doi.org/10.1016/j.cemconres.2021.106566

UT WoS

000713249700008

Keywords in English

Thaumasite sulfate attack; X-ray micro-computed tomography; Solid state NMR spectroscopy; Nanoindentation; Thermodynamic modelling

Abstract

V originále

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.

Links

90043, large research infrastructures

Name: CIISB

Citovat

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. 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.

@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.

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