Original ResearchPublished 5 October 2026Influence of alkali activator modulus on mechanical properties and microstructure of slag-fly ash geopolymer-solidified dredged sludgeYulin Wang · Yan Tian · Sisi Fang · Xianding Guo · Yating Fan · Jun Wang · Daohe Wu · Yinghua Cui · Xuexian You · Zipeng QinFrontiers in Materialsdoi 10.3389/fmats.2026.1861716