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TitlePhase development of NaOH activated blast furnace slag geopolymers cured at 90°C
Publication TypeConference Paper
Year of Publication2009
AuthorsZhang, B., Mackenzie K.J.D., Bigley C., Ryan M.J., and Brown I.W.M.
Conference NameAIP Conference Proceedings
Date Published2009
AbstractGeopolymers were synthesized from blast furnace slag activated with different levels of NaOH and cured at 90°C. The crystalline and amorphous phases of the resulting geopolymers were characterized by XRD quantitative analysis, and 29Si and 27Al MAS NMR. Amorphous species are predominant in materials at all NaOH levels. In the amorphous phase, aluminium substituted silicate species (Q 2(1Al)) dominated among the species of Q 0, Q 1, Q 2(1Al) and Q 2 (where Q n(mAl) denotes a silicate tetrahedron [SiO 4] with n bridging oxygen atoms and m adjacent tetrahedral substituted with an aluminate tetrahedron [AlO 4]). In addition, it was also found that 4-fold coordination aluminium [AlO 4] species ( 27Al chemical shift 66.1ppm) in low NaOH containing materials differs from the species ( 27Al chemical shift 74.3ppm) in high NaOH containing materials. © 2009 American Institute of Physics.

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