木材生物质灰储存对水泥基复合材料性能的影响。

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

作者信息

Carević Ivana, Štirmer Nina, Serdar Marijana, Ukrainczyk Neven

机构信息

Department of Materials, Faculty of Civil Engineering, University of Zagreb, Fra Andrije Kačića Miošića 26, 10000 Zagreb, Croatia.

Institute of Construction and Building Materials, Technical University of Darmstadt, Franziska-Braun-Straße 3, 64287 Darmstadt, Germany.

出版信息

Materials (Basel). 2021 Mar 26;14(7):1632. doi: 10.3390/ma14071632.

DOI:10.3390/ma14071632

PMID:33810587

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8036677/

Abstract

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.

摘要

由于木质生物质产生的灰分大多最终被填埋，近期的研究聚焦于寻找其作为建筑行业潜在新原材料的经济和环境附加值。然而，要使木灰在建筑行业实现工业规模应用，必须制定妥善的储存策略。妥善储存木灰对确保水泥基复合材料应用的质量控制至关重要。本研究调查了从克罗地亚五个不同发电厂收集的木质生物质灰（WBA）的老化情况及其对水泥基复合材料性能的影响。使用热重分析（TGA）、粉末X射线衍射（XRD）、等温量热法以及初凝和终凝时间，对不同老化时间（长达一年）的WBA和水泥净浆进行了研究。结果表明，将WBA储存在密闭和敞口容器中分别导致主要是游离石灰和方镁石的碳化和水化，这影响了WBA水泥净浆的反应活性和凝结时间。