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Experimental carbonation study for durability assessment of novel cementitious materials [Elektronski vir]Robič, Sebastijan ...The design process of concrete structures is carried out using standards and guidelines, while the durability predictions of concrete structures is supported only with exposure classes and ... experience-based requirements. To improve durability predictions of the carbonation resistance of concrete, a numerical model is being developed within the Horizon 2020 project EnDurCrete, coupling the rate of carbonation, and the drying rate. To verify the numerical model, an accelerated carbonation study was carried out. Experiments were conducted on mortars incorporating a novel CEM II/C (S-LL) cement, developed within the EnDurCrete project, and a commercially available reference cementCEM II/A-S. EnDurCrete mortars (EnM) and reference mortars (RefM) were prepared with water-cement ratios of 0.6 and 0.5 (denoted with label extensions -06 and -05). Visual assessments and thermogravimetric analysis (TGA) were used to measure the carbonation rates, which were found to be ~1.0 mm day-0.5 in EnM-06 and ~0.6 mm day-0.5 in RefM-06, while in EnM-05 and RefM-05 the values were ~0.7 and ~0.2 mm day-0.5 respectively. Additionally, TGA shows that the initial portlandite (CH) content is ~1.5 wt% in EnM-06 as opposed to ~3.0 wt% in RefM-06. The difference in the initial CH content in the two hydrated binders might explain the difference in their carbonation rate. During the moisture transport experiments a gravimetric method was used to determine mass changes as specimens underwent drying and resaturation with and without CO2 present. The drying led to a decrease in mass, but in the presence of CO2 this mass loss was compensated by the mass gain due to uptake of CO2 during carbonation. The resaturation experiments indicate an increase in the suction porosity in the carbonated samples compared to the non-carbonated samples.Source: Construction materials for a sustainable future [Elektronski vir] : proceedings of the 2nd International Conference CoMS 2020/21 : 20-21 April 2021, online conference : volume 2 (Str. 128-135)Type of material - conference contribution ; adult, seriousPublish date - 2021Language - englishCOBISS.SI-ID - 64712707
Author
Robič, Sebastijan |
Šajna, Aljoša |
Hanžič, Lucija |
Machner, Alisa |
Bjørndal, Marie Helene |
De Weerdt, Klaartje |
Gu, Yushan |
Bary, Benoit |
Lample, Rosamaria
Topics
beton |
vpijanje vode |
karbonizacija |
ocena trajnosti |
verifikacija modela |
odprti dostop |
concrete |
absorption of water |
carbonation |
durability assessment |
model verification |
open access
Author | Robič, Sebastijan ... |
Title | Experimental carbonation study for durability assessment of novel cementitious materials [Elektronski vir] |
Publication date | 2021-01-01 |
COBISS.SI-ID | 64712707 |
Publication version in repository | Publisher's version |
Publication licence | Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International |
Embargo | Immediate publication for public |
Project(s) from which the publication was funded
Title | Acronym | Project ID | Funder |
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New Environmental friendly and Durable conCrete, integrating industrial by-products and hybrid systems, for civil, industrial and offshore applications – EnDurCrete | EnDurCrete | 760639 |
European Commission |
Files that belong to the publication
Link |
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http://www.zag.si/dl/coms2020-21-proceedings-2.pdf |
https://dirros.openscience.si/IzpisGradiva.php?id=17965 |
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Robič, Sebastijan | 50085 |
Šajna, Aljoša | 13200 |
Hanžič, Lucija | 16432 |
Machner, Alisa | |
Bjørndal, Marie Helene | |
De Weerdt, Klaartje | |
Gu, Yushan | |
Bary, Benoit | |
Lample, Rosamaria |
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