TiO2改性煤气化粗渣基地质聚合物的微观结构与性能

煤气化渣可分为粗渣和细渣,其有在碱激发领域应用的潜力。本文对煤气化粗渣的理化性能进行了研究,使用煤气化粗渣制备了地质聚合物,并对其进行了TiO₂的改性研究。结果表明,在煤气化粗渣基地质聚合物中掺入一定量的TiO₂可明显改善其力学性能。当掺入质量分数为10.0%的TiO₂时,样品28 d的抗压强度可从23.4 MPa提高到42.9 MPa。此外,通过对样品进行物相分析与微观结构分析, TiO₂的掺入明显改善了地质聚合物的微观结构,促进了碱激发反应,提高了材料的力学性能。

Microstructure and Properties of TiO2 Modified Coal Gasification Coarse Slag Based Geopolymer

Coal gasification slags can be divided into coarse slag and fine slag,which has potential application in alkali-activation field.The physical and chemical properties of coal gasification coarse slag were studied,and the geopolymer was prepared by using coal gasification coarse slag,meanwhile geopolymer modified by TiO₂ was studied.The results show that the mechanical properties of coal gasification coarse slag based geopolymer significantly improve by adding a certain amount of TiO₂.When 10.0%(mass fraction)TiO₂ is added,the 28 d compressive strength of the sample increases from²3.4 MPa to 42.9 MPa.In addition,through phase and microstructure analysis of the samples,the addition of TiO₂ significantly improves the microstructure of the geopolymer,promotes the alkali-activation reaction,and improves the mechanical properties of the material.