| Title: | Experimental carbonation study for durability assessment of novel cementitious materials |
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| Authors: | ID Robič, Sebastijan (Author)
ID Šajna, Aljoša (Author)
ID Hanžič, Lucija (Author)
ID Machner, Alisa (Author)
ID Bjørndal, Marie Helene (Author)
ID De Weerdt, Klaartje (Author)
ID Gu, Yushan (Author)
ID Bary, Benoit (Author)
ID Lample, Rosamaria (Author) |
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| Files: |  PDF - Presentation file, download (9,29 MB)
MD5: 9894BB38311A12D91AA0F5BC762F8F04
Description: Odprti dostop
PDF - Presentation file, download (2,20 MB)
MD5: 4E4ED91028BE9281399BA445A6D142D7
 URL - Source URL, visit https://www.zag.si/dl/coms2020-21-proceedings-2.pdf
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| Language: | English |
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| Typology: | 1.08 - Published Scientific Conference Contribution |
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| Organization: |  ZAG - Slovenian National Building and Civil Engineering Institute
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| Abstract: | 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. |
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| Keywords: | concrete, absorption of water, carbonation, durability assessment, model verification |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Publication date: | 01.01.2021 |
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| Publisher: | Slovenian National Building and Civil Engineering Institute |
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| Year of publishing: | 2021 |
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| Number of pages: | Str. 128-135 |
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| PID: | 20.500.12556/DiRROS-17965  |
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| UDC: | 624 |
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| COBISS.SI-ID: | 64712707 |
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| Copyright: | © 2021 Slovenian National Building and Civil Engineering Institute |
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| Note: | Nasl. z nasl. zaslona;
Opis vira z dne 26. 5. 2021;
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| Publication date in DiRROS: | 25.01.2024 |
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| Views: | 596 |
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| Downloads: | 448 |
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