Study on preparation and compressive strength of fly ash geopolymer
WANG Yaguang
HAN Fenglan
ZHAO Shizhen
CHEN Yujie
MU Jingqiu
Abstract：In this study,fly ash geopolymer was prepared through alkali activation under different alkali content,curing tem-perature,stirring time and curing time. The compressive strengths of these samples were tested,and these samples were character-ized by XRD,FTIR,SEM. The results show that maximum strength of 39.81 MPa was obtained when 1300 g of fly ash,liquid-solid ratio of 0.45,19% of the alkali content,stirring time of 15 min,the curing temperature of 80℃,the curing time of 16h were used at 28th days of testing. The microstructural characteristic results investigated by XRD,FTIR showed that the depolymerization-polymerization reaction occurred between the glassiness in the fly ash and added alkali activator,the produced N-A-S-H during the polymerization was the main source of the strength of fly ash geopolymer.
Keywords：fly ashgeopolymeralkali activationcompressive strength
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 12-16 )