粉煤灰地聚合物力学性能影响因素研究综述

摘要/Abstract

摘要： 粉煤灰地聚合物是以粉煤灰为硅铝质原料制备的,具有强度高、耐高温、耐腐蚀、有效固封金属离子等优点。但它固有的脆性以及需高温养护才能快速获得高强度的特点限制了其运用范围,而以纤维作为增强材料不仅可以提高粉煤灰地聚合物的强度,还可以改善其延性和韧性。本文主要从粉煤灰原料特性、碱激发剂、养护制度和增强材料四方面入手,重点阐述了粉煤灰粒径和化学组成,碱激发剂的种类、用量和模数,升温养护时间和初期养护温度对抗压强度的影响,以及纤维对粉煤灰地聚合物抗压强度和弯曲性能的影响。最后,根据现有的研究成果,对四种影响因素分别是如何影响粉煤灰地聚合物力学性能进行总结。

关键词: 地聚合物, 粉煤灰, 碱激发剂, 养护环境, 纤维, 力学性能

Abstract: Fly ash geopolymer is prepared by using fly ash as a silico-alumina raw material. It has the advantages of high strength, high-temperature resistance, corrosion resistance, and effective sealing of metal ions. However, its inherent brittleness and the need for high-temperature curing to quickly obtain high strength limits its scope of application, and the use of fiber as a reinforcing material for fly ash geopolymer can not only increase its strength, but also improve its ductility and toughness. Starting from four aspects: the characteristics of fly ash raw materials, alkali activator, curing system and reinforcing materials, the effects of the particle size and chemical composition of fly ash, the type, dosage and modulus of alkali activator, the heating curing time and initial curing temperature on the compressive strength, and the effect of fiber on the compressive strength and flexural performance of fly ash geopolymers were reviewed. Finally, based on the existing research results, how the four influencing factors affect the mechanical properties of fly ash geopolymers were summarized.

Key words: geopolymer, fly ash, alkali activator, curing environment, fiber, mechanical property

中图分类号:

TU526

彭玉清, 郭荣鑫, 林志伟, 张敏. 粉煤灰地聚合物力学性能影响因素研究综述[J]. 硅酸盐通报, 2021, 40(3): 858-866.

PENG Yuqing, GUO Rongxin, LIN Zhiwei, ZHANG Min. Review on Influencing Factors of Mechanical Properties of Fly Ash Geopolymer[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(3): 858-866.

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