Lucija Hanžič (Avtor), Sebastijan Robič (Avtor), Alisa Machner (Avtor), Marie Helene Bjørndal (Avtor), Klaartje De Weerdt (Avtor), Yushan Gu (Avtor), Benoit Bary (Avtor), Rosa Maria Lample Carreras (Avtor), Aljoša Šajna (Avtor)

Povzetek

Durability predictions of concrete structures are derived from experience-based require- ments and descriptive exposure classes. To support durability predictions, a numerical model related to the carbonation resistance of concrete was developed. The model couples the rate of carbonation with the drying rate. This paper presents the accelerated carbonation and moisture transport exper- iments performed to calibrate and verify the numerical model. They were conducted on mortars with a water-cement ratio of either 0.6 or 0.5, incorporating either a novel cement CEM II/C (S-LL) (EnM group) or commercially available CEM II/A-S cement (RefM group). The carbonation rate was determined by visual assessment and thermogravimetric analysis (TGA). Moisture transport experi- ments, consisting of drying and resaturation, utilized the gravimetric method. Higher carbonation rates expressed in mm/day−0.5 were found in the EnM group than in the RefM group. However, the TGA showed that the initial portlandite (CH) content was lower in the EnM than in the RefM, which could explain the difference in carbonation rates. The resaturation experiments indicate an increase in the suction porosity in the carbonated specimens compared to the non-carbonated specimens. The study concludes that low clinker content causes lower resistance to carbonation, since less CH is available in the surface layers; thus, the carbonation front progresses more rapidly towards the core.

Ključne besede

malta;absorpcija vode;karbonizacija;ocena trajnosti;verifikacija modela;odprti dostop;mortar;absorption of water;carbonation;durability assessment;model verification;open access;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: ZAG - Zavod za gradbeništvo Slovenije
Založnik: Molecular Diversity Preservation International
UDK: 620.1/2
COBISS: 90016515 Povezava se bo odprla v novem oknu
ISSN: 1996-1944
Št. ogledov: 6
Št. prenosov: 2
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarni jezik: Slovenski jezik
Sekundarne ključne besede: malta;absorpcija vode;karbonizacija;ocena trajnosti;verifikacija modela;
Komentar vira: Nasl. z nasl. zaslona; Opis vira z dne 17. 12. 2021; This article belongs to the Special Issue Feature papers on construction materials for a sustainable future 2020/21; Št. članka 6253;
Strani: str. 1-17
Letnik: ǂVol. ǂ14
Zvezek: ǂiss. ǂ21
Čas izdaje: 2021
DOI: 10.3390/ma14216253
ID: 19478720