국외전문학술

Sasui, S., Kim, G., Nam, J., Alam, S. F., Eu, H., Lee, Y., & Ahmad, M. (2023). Alkali activation of waste concrete powder: Effects of alkali type and concentration. Ceramics International, 49(10), 16260-16271.
Sasui, S., Kim, G., Nam, J., Alam, S. F., Eu, H., Lee, Y., & Ahmad, M. (2023). Alkali activation of waste concrete powder: Effects of alkali type and concentration. Ceramics International, 49(10), 16260-16271.
작성자 건설재료시공학연구실
조회수 821 등록일 2023.05.15
이메일
주저자 Sasui Sasui
교신저자
공동저자 Gyuyong Kim, Jeongsoo Nam, Syed Fakhar Alam, Hamin Eu, Yaechan Lee, Mahmood Ahmad
학술지명 Ceramics International

Concrete is a conventional material widely used for decades to build infrastructures. Consequently, a significant amount of waste concrete is being generated. Alkali activation of waste concrete powder (WCP) is a sustainable approach for efficiently recycling waste concrete to produce alkali-activated cement. Accordingly, this study recycled waste concrete by alkali activation of WCP. The effects of two alkali activators (NaOH and KOH) of various concentrations on the performance of alkali activated WCP cement were discussed. The synthesized samples were cured at room temperature for up to 28 days and then compressive strength test was performed. The samples were then characterized by Fourier transform infrared (FT-IR) spectroscopy, X-ray powder diffraction (XRD), scanning electron microscope (SEM) and energy dispersive X-ray spectroscopy (EDS). It was found that the NaOH-activated WCP outperformed the KOH-activated WCP. Moreover, activation by 8 M alkali solutions improved the compressive strength, microstructure, and reactivity of WCP. The findings of this study are significant for developing alkali-activated cement using waste concrete powder. 


https://doi.org/10.1016/j.ceramint.2023.01.224