粉煤灰基地聚物的性能影响因素及其凝胶产物研究进展

Research Development on Influencing Factors of Performances and Gel Products in Fly Ash-Based Geopolymer Material

粉煤灰基地聚物材料因绿色、低碳等优点受到建材行业关注。本文基于地聚物的形成及优势,分析了粉煤灰作为硅铝基材的优点,着重阐述了激发剂离子、养护方式和钙组分对粉煤灰基地聚物材料性能的影响,综述了粉煤灰基地聚物材料的凝胶产物变化及其反应机理研究进展。目前含钙固废作为添加物逐渐应用于改性粉煤灰基地聚物中,因此明确凝胶产物组成和反应机理将为粉煤灰基地聚物材料性能优化提供理论指导。

Fly ash-based geopolymer materials are favored in the building material industry owing to the advantages of green and low-carbon.Silica-aluminum precursors,alkali-activators and water are the basic components for geopolymeric reaction.However,the gel products in fly ash-based geopolymer material are changing with additional calcium content in system.In this paper,based on the formation and advantage of geopolymer,the advantage of fly ash was analyzed as silica-aluminum precursor.Also,the influences of activator ions,curing conditions and calcium-components were emphasized on the performances of modified fly ash-based geopolymer material.Furthermore,the research developments of gel products and reaction mechanisms were reviewed for fly ash-based geopolymer materials.Currently,the calcium-containing solid wastes tend to be utilized as the inorganic additives to improve the performances of modified fly ash-based geopolymer materials.Therefore,clarifying gel products and reaction mechanisms will provide the theoretical guidance for the performance optimization of fly ash-based geopolymer materials.