Effect of Wood Biomass Ash Storage on the Properties of Cement Composites

Materials

卷:14

Marijana Serdar¹  Nina Štirmer¹  Ivana Carević¹  Neven Ukrainczyk² 

[1] Department of Materials, Faculty of Civil Engineering, University of Zagreb, Fra Andrije Kačića Miošića 26, 10000 Zagreb, Croatia;

[2] Institute of Construction and Building Materials, Technical University of Darmstadt, Franziska-Braun-Straße 3, 64287 Darmstadt, Germany;

关键词: wood biomass ash;    cement-based materials;    cement partial replacement;    aging;    hydration;    carbonation;   

DOI  :  10.3390/ma14071632

来源: DOAJ

【 摘 要 】

Since ash from wood biomass mostly ends up in landfills, recent research has focused on finding its economic and environmental added value as a potential new raw material in the construction industry. However, for wood ash to be used on an industrial scale in construction, a strategy for its proper storage must be defined. Proper storage of WBA is important to ensure quality control for applications in cementitious composites. This work investigated the aging of wood biomass ash (WBA) collected from five different power plants in Croatia and its influence on the performance of cementitious composites. WBA and cement pastes were investigated at different aging times (up to one year) using thermogravimetric analysis (TGA), powder X-ray diffraction (XRD), isothermal calorimetry and initial and final setting times. The results showed that storage of WBA in closed and open containers resulted in carbonation and hydration of mainly free lime and periclase, respectively, which affected the reactivity and setting times of WBA cement pastes.

【 授权许可】

Unknown