Elena Sutormina (Avtor), Marjan Marinšek (Avtor), Anton Meden (Avtor)

Povzetek

This work considers the reactions of dolomite powder mixed with Portland cement during ageing under accelerating conditions (60 °C, water or alkaline medium). The phase composition and microstructure of cement-dolomite mortars were studied using X-ray diffraction (XRD), thermogravimetric analysis (TGA), and scanning electron microscopy with X-ray microanalysis (SEM-EDS). The results showed that the alkalinity of the medium increased the dolomite reaction degree but did not affect the reaction products’ composition. The formation of the hydrotalcite-like phase with the gen-eral formula $Mg_4Al_2(CO_3)_{1−x}(OH)_{12+2x}·nH_2O$ proved to be the predominant route of dolomite consumption in the pres-ence of available aluminium in the hardened cement paste. Then, after three months of ageing, an interlayer anions re-placement became noticeable: carbonate anions in the structure of hydrotalcite are gradually replaced by hydroxide ones.

Ključne besede

dolomite-cement mortars;accelerating ageing conditions;dedolomitisation;hydrotalcite-like phase;interlayer anions replacement;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: UL FKKT - Fakulteta za kemijo in kemijsko tehnologijo
UDK: 666.971.4
COBISS: 177681923 Povezava se bo odprla v novem oknu
ISSN: 1580-3155
Št. ogledov: 10
Št. prenosov: 0
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: dolomitno cementne malte;pogoji pospešenega staranje;dedolomitizacija;hidrotalcitne faze;anionska medplastna izmenjava;
Vrsta dela (COBISS): Članek v reviji
Strani: str. 371-379
Letnik: ǂVol. ǂ70
Zvezek: ǂno. ǂ3
Čas izdaje: 2023
DOI: 10.17344/acsi.2022.7907
ID: 21815786