<p>Conventional pavement-quality concrete (PQC) used in concrete pavements exhibits poor workability and consumes significant energy due to its rigorous vibration requirements. This also requires more labourers and generates noise during construction. Self-consolidating concrete (SCC) addresses some issues, but its high flowability and poor shape-holding ability limit its use in slip-form paving for concrete pavements. An innovative SCC, semi-flowable self-consolidating concrete (SFSCC), bridges this gap by combining PQC’s shape stability with SCC’s self-compaction, enabling slip-form placement while eliminating vibration, making it economical and energy-efficient. This paper reviews the effect of various agro-industrial by-products (Fly ash, ground granulated blast furnace slag, rice husk ash, sugarcane bagasse ash as supplementary cementitious materials (SCM), Ceramic waste, coal bottom ash, copper slag, ferrochrome slag, waste foundry sand, iron slag, reclaimed asphalt pavement, recycled concrete aggregate, and steel slag as aggregates) and fibres (basalt, coir, glass, jute, polypropylene, and steel fibres) on the fresh, mechanical and durability properties of SCC and SFSCC. The physical, chemical, mineralogical, and morphological characteristics of these by-products were also outlined. Use of these by-products promotes sustainability, reduces the carbon footprint, and aligns with multiple United Nations Sustainable Development Goals (SDGs). The review reveals that research on SFSCC remains limited, particularly regarding the use of agro-industrial waste as substitutes for virgin aggregates, and highlights significant research opportunities. Overall, the study provides existing knowledge on the role of agro-industrial by-products and fibres in developing the SFSCC and highlights its potential as a sustainable material for concrete pavement construction.</p>