Effect of geopolymer cement stabilisation on fatigue life of pavement sub-bases with recycled demolition aggregates

Recycled Construction and Demolition (C&D) materials have traditionally been considered as waste materials in Australia. This study evaluates the behaviour of C&D materials when stabilized with geopolymers. Fly Ash (FA) and ground granulated blast furnace. A large scale tank test was also carried out to ascertain the fatigue performance of the stabilized C&D materials for pavement base/subbase applications and was also used for verification of the numerical finite element model. A small strain constitutive model was defined to predict settlements under fatigue loading test. This research proposes to replace high quality quarry materials with C&D materials stabilized with geopolymer binder.