Performance Evaluation and Microstructure Characterization of Metakaolin-Based Geopolymer Containing Oil Palm Ash

Figure 3

Compressive strength of geopolymer mortar with different SiO₂/Al₂O₃ and heat curing time measured after (a) 2 hours, (b) 24 hours, and (c) 28 days.

(a)

(b)

(c)