A high early strength is one of the

A high early strength is one of the most important properties of pavement repair materials, to allow quick reopening to traffic. With this in mind, we have experimentally investigated geopolymers that use also locally available waste streams as raw materials. The geopolymer mortar was metakaolin (MK) mixed with parawood ash (PWA) or oil palm ash (OPA) as binder agents. The samples were characterized for compressive strength, drying shrinkage, and bond strength to Portland cement mortar with slant shear test. The experimental design varied the contents of PWA and OPA; the heat curing time (1, 2 and 4 h); and the hot mixture process. The hot mixture process resulted in very high early strength. In addition we achieved high compressive strengths, low drying shrinkage, and bond strength enhancement by the ashes.