Characterised by its low density, self-compacting nature and high thermal insulation, foamed concrete is especially attractive for several construction works. While it is widely used for non-structural applications, such as void filling or road subbases, its application as a load-bearing material is still very restricted. To address these limitations, this thesis contributes to a broader research effort aimed at developing and industrialising high-strength foamed concrete (HSFC), and at proving that the material can be a viable and lightweight alternative to traditional concrete. More precisely, the work presented investigates the impact of fine aggregates, testing how different sand types affect the material’s compressive strength without compromising its low weight.