Effects of Thermally Treated Flue Gas Desulfurization (FGD) Gypsum on the Class-C Fly Ash-Based Geopolymer
Effects of thermally treated flue gas desulfurization (FGD) gypsum on the Class-C fly ash-based geopolymer were explored. Geopolymers: (a) CFA made from 100％ of fly ash, and (b) CFA-FGDG made from 90％ of fly ash and 10％ of FGD gypsum baked at 800 ℃ for 1 h, were evaluated after curing at 75 ℃ for 8 h followd by 23 ℃ for 28 d. XRD patterns indicated that the product is mainly amorphous gel. In FT-IR, the main peaks have been attributed to asymmetric stretching of Al-O/Si-O bonds and Si-O-Si/Si-O-Al bending, and the peaks in the specimen of CFA-FGDG are more significant than that in specimen of CFA. In SEM-EDXA, CFA-FGDG has a small quantity of lathy products wrapped over the spherical fly ash except the amorphous gel. The Si/Al ratios in specimens of CFA and CFA-FGDG were 3.15 and 2.62, thus, the main products indicated to be geopolymers which give the mechanical performance.
Flue gas desulphurization (FGD) gypsum fly ash geopolymer thermal treatment
Xiaolu Guo Huisheng Shi Warren A Dick
Key Laboratory of Advanced Civil Engineering Materials (Tongji University), Ministry of Education Sh School of Environment and Natural Resources, The Ohio State University, 1680 Madison Avenue, Wooster
国际会议
6th Asian Symposium on Polymers in Concrete(第六届亚洲聚合物混凝土国际会议)
上海
英文
135-141
2009-10-29（万方平台首次上网日期，不代表论文的发表时间）