Potential of Using Wood Biomass Ash in Low-Strength Composites

Materials

Jelena Šantek Bajto¹  Marija Bezinović¹  Nina Štirmer¹  Ana Baričević¹  Ivana Carević¹  Keti Kristović² 

[1] Department of Materials, Faculty of Civil Engineering, University of Zagreb, Fra Andrije Kačića Miošića 26, 10000 Zagreb, Croatia;Trames Ltd., Šipčine 2, 20 000 Dubrovnik, Croatia;

关键词: wood biomass ash;    hydraulic lime;    coal fly ash;    historical buildings;   

DOI  :  10.3390/ma14051250

来源: DOAJ

【 摘 要 】

Reducing greenhouse gas emissions and dependence on fossil fuels is the cornerstone of all European climate and energy strategies. Consequently, renewable energy sources are becoming more competitive with fossil fuels. The largest source of bioenergy in the European Union is biomass-fired power plants. Therefore, the European coal phase-out strategy led to an increased use of wood biomass as a sustainable fuel, generating large amounts of wood biomass ash (WBA). In the research studies reported so far, WBA has been mainly used in cementitious composites. However, given the similarities between the chemical composition of WBA and hydraulic lime (HL), this research focused on its potential classification as a building lime. Overall, three different sources of fly WBA were considered for the preparation of binders as mixtures of WBA and coal fly ash (CFA) in different ratios. The contribution of each binder mixture on the paste and mortar properties was analyzed based on the chemical composition, setting time, volume stability, and contribution to the mortar strength (compressive and flexural). In general, it can be concluded that the studied binders can meet the criteria of EN 459-1. However, special attention should be paid to the volume deformations and the setting time.

【 授权许可】

Unknown