Alkali-Activated Binders offer an excellent low-carbon, durable and environmentally sensitive alternative to Portland cement. Their reaction mechanism, involving dissolution, orientation and hardening, is not widely understood. This captures the current state of the art for both professionals and academics, updating the 2005 work Alkali-activated Cements and Concretes. It surveys:The raw materials and their propertiesThe hydration and microstructure development of alkali-activated slag/fly ash/metakaoline bindersThe mechanical properties and durability of alkali-activated slag/fly ash/metakaoline binders and concretesVarious other cementing systems and their applicationsFiber-reinforced alkali-activated binders and concretesRelated standards and specificationsTheir carbon footprint and life cycle analysis