Abstract
The paper presents an experimental study on the durability of geopolymer stabilised compacted earth (GSCE) samples exposed to various wetting–drying (w-d) cycles at different pH and salt concentration conditions. Compressive strength, splitting tensile strength, weight loss, and moisture content were determined after 1, 3, 6, 9, and 12 w-d cycles. The microstructure, mineralogical and chemical compositions were characterised by SEM, XRD, and FTIR techniques. The results showed that after 12 w-d cycles, all samples tested had compressive strengths higher than 4.5 MPa. This value was higher than the minimum value required by the standards. The samples exposed to the pH = 4 solution had the highest performance. The results show the potential application of GSCE in severe conditions.
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