Gum arabic as a sustainable modifier for lime-metakaolin mortars
Artykuł w czasopiśmie
MNiSW
140
Lista 2024
| Status: | |
| Autorzy: | Brzyski Przemysław, Matejdes Marián, Medved Igor, Slaný Michal |
| Dyscypliny: | |
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| Rok wydania: | 2025 |
| Wersja dokumentu: | Drukowana | Elektroniczna |
| Język: | angielski |
| Wolumen/Tom: | 493 |
| Numer artykułu: | 143146 |
| Strony: | 1 - 26 |
| Impact Factor: | 8,0 |
| Web of Science® Times Cited: | 0 |
| Scopus® Cytowania: | 0 |
| Bazy: | Web of Science | Scopus |
| Efekt badań statutowych | NIE |
| Finansowanie: | This research was funded by the Polish Ministry of Education and Science within the grant number FD-20/IL-4/009. This research was also supported by the Czech Ministry of Education, Youth and Sports, the institutional research program No. RVO: 11000. The authors also acknowledge the financial support of this research by the project Slovak Grant Agency VEGA (Grant 1/0278/25). |
| Materiał konferencyjny: | NIE |
| Publikacja OA: | TAK |
| Licencja: | |
| Sposób udostępnienia: | Witryna wydawcy |
| Wersja tekstu: | Ostateczna wersja opublikowana |
| Czas opublikowania: | W momencie opublikowania |
| Data opublikowania w OA: | 14 sierpnia 2025 |
| Abstrakty: | angielski |
| A low mechanical strength and a slow setting process of lime mortars limit the scope of their applications. One of the possibilities for improving their parameters while maintaining sustainability is the use of admixtures of natural origin. This paper assesses the potential of modifying the properties of a lime mortar with gum arabic (GA) at the amount of 1 wt%, 3 wt%, and 5 wt% of the binder mass. A problematic factor in the use of GA is its liquefying properties (limiting the use of mortar), and therefore, another variable was the amount of mixing water. Reducing the amount of water (in the case of 5 wt% of GA) resulted in a reduced liquefaction effect, maintaining optimal consistency and significantly increasing strength. Adding water gradually without reducing the amount can prevent the GA-modified mixture from thinning out. Using each dose of GA increased the water retention capacity of the fresh mortar and reduced its drying shrinkage. Increasing the amount of GA reduced the water absorption capacity, and total porosity, while increasing the pore size of the hardened mortars (confirmed by MIP). A significant benefit is the increase in the flexural and compressive strengths of mortars with an increase in the GA content, reaching a maximal increase of 55 % and 76 %, respectively, at 5 wt% of GA with respect to the reference mortar. Only the 1 wt% of GA admixture caused a deterioration in the mortar's workability and a decrease in its strength. SEM analysis showed the effect of higher GA doses on the formation of tightly packed agglomerations of film-coated lime particles. FTIR analysis revealed that the presence of GA alters the carbonation behavior and organic profile of the mortar matrix. XRD analysis and the phenolphthalein test also demonstrated the effect of GA on the carbonation process. The tests showed varied ranges of measured mortar properties, which allows for their wider use in comparison with unmodified lime-metakaolin mortar. |
