Geopolymer・Alkali-activated materialsⅡ

[1118] COMPRESSIVE STRENGTH OF ALKALI-ACTIVATED MATERIAL USING SEWAGE SLUDGE ASH WITH SUPPLEMENTARY BINDERS

Mohsin ALI¹, Chikako FUJIYAMA¹ (1.Yokohama National University)

Keywords:sodium hydroxide molarity、sewage sludge ash、GGBS、silica fume、fly ash

This study develops a mix design for alkali-activated material (AAM) using sewage sludge ash, GGBS, silica fume, and fly ash with (12M to 16 M) NaOH molarities. The 28-day compressive strength of 42.80 MPa was achieved with SSA -GGBS at 12M, while 36.68 MPa and 39.58 MPa were recorded with 14% SF at 12M and 10% FA at 14M, respectively. However, higher molarity and SSA replacement ratios negatively affected compressive strength. Furthermore, the hardening mechanism of AAMs in this study was assumed based on microstructure analysis.