PSI - Issue 67

I. Flores-Vivián et al. / Procedia Structural Integrity 67 (2025) 80–89 Ismael Flores-Vivián / Structural Integrity Procedia 00 (2024) 000 – 000

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Figure 8. FT-IR spectra of pastes with 7M and 12M NaOH concentration

Figure 9 . (a) R10 paste, b) ZN10 paste and c) ZY10 paste at the age of 7 days.

4. Conclusions Both the pastes with the addition of Zeolite NaY and ZN did not show major differences with respect to the reference paste, showing a similar degree of polymerization, according to the positions of the absorption bands in the FT-IR analysis, and agreeing with the microstructural analysis performed in the SEM images. On the other hand, the increase in the molarity of the NaOH of the AA promotes the dissolution of bonds, promoting the formation of aluminum-rich species and a higher degree of polymerization.