Assessment of the possibility of using a clay-hemp mixture modified with gum arabic as a wall material
Artykuł w czasopiśmie
MNiSW
140
Lista 2024
| Status: | |
| Autorzy: | Brzyski Przemysław |
| Dyscypliny: | |
| Aby zobaczyć szczegóły należy się zalogować. | |
| Rok wydania: | 2026 |
| Wersja dokumentu: | Elektroniczna |
| Język: | angielski |
| Wolumen/Tom: | 126 |
| Numer artykułu: | 116236 |
| Strony: | 1 - 33 |
| Impact Factor: | 7,4 |
| Web of Science® Times Cited: | 0 |
| Scopus® Cytowania: | 0 |
| Bazy: | Web of Science | Scopus |
| Efekt badań statutowych | NIE |
| Finansowanie: | These studies were financially supported by the Ministry of Science and Higher Education (Poland) under grants no. FD-20/IL-4/009 and FD-20/IL-4/999 |
| Materiał konferencyjny: | NIE |
| Publikacja OA: | NIE |
| Abstrakty: | angielski |
| The use of clay as unprocessed material is a sustanaible alternative to lime in composites based on hemp shives. Clay may be more readily available, including locally. However, the clay binding proces is not chemical and irreversible, hence its poor durability and low tolerance of contact with water. It is advisable to seek ecological ways of modifying the binder in order to expand the scope of composite's application by improving selected properties. In this work, the influence of composite modification with gum arabic (GA) at a dose of 1, 3, 5 wt% on its properties was assessed. The strength tests such as compression, flexural, splitting tension and longitudinal modulus of elasticity were performed. In addition, density, porosity, capillary rise, sorption moisture and thermal conductivity were investigated. The microstructure and morphology were characterized using SEM, FTIR and XRD analyses. GA promotes slightly greater moisture sorption capacity of the composite at RH above 90%. The presence of GA in the amount of 3 and 5 wt% decreased the absorptivity by capillary action. The benefit of using GA was the improvement of strength with increasing the share of GA. The strengths: flexural, compressive and splitting tensile were improved by a maximum of 183%, 64% and 105%, respectively. SEM analysis confirmed the formation of a compact microstructure and the interconnection of clay particles after the application of the highest amounts of GA. XRD and FTIR analyses revealed differences in the width and intensity of certain peaks, suggesting an interaction between the biopolymer hydrogel and the clay particle surface. The 5 wt% of GA allows for a reduction of the clay content, lowering the composite density, its thermal conductivity and maintaining higher strength than the reference composite. The improved mechanical properties due to the GA admixture, satisfactory thermal characterization (0.079-0.083 W/(m·K)) may bring benefits in the case of use the composite in wall blocks, subjecting them to accelerated drying |
