Geotechnical and Environmental Impacts of Using Alternative Cementitious Materials in Concrete Mixes

The construction industry remains one of the largest contributors to global carbon emissions, with ordinary Portland cement (OPC) production accounting for a significant share due to high energy consumption and carbon intensive clinker manufacturing processes. As infrastructure development accelerates worldwide, particularly in rapidly urbanizing regions, the demand for sustainable construction materials has become urgent. In recent decades, alternative cementitious materials (ACMs), including fly ash, ground granulated blast furnace slag (GGBS), silica fume, and rice husk ash, have gained attention as partial replacements for OPC in concrete mixes. This research paper investigates the geotechnical and environmental impacts associated with the use of alternative cementitious materials in concrete, emphasizing real world construction conditions and performance requirements. The study evaluates the influence of ACMs on parameters such as soil–structure interaction, compressive and long term strength development, durability under aggressive environmental exposure, permeability characteristics, and resistance to chemical attack. Environmental performance indicators including carbon footprint reduction, energy savings, industrial waste utilization, and lifecycle sustainability are also assessed. Experimental findings and recent literature indicate that ACM based concrete exhibits reduced permeability, enhanced resistance to sulfate and chloride ingress, and improved long term mechanical performance compared to conventional OPC concrete. These contribute to improved geotechnical behavior in foundations exposed to adverse soil conditions. Furthermore, adopting alternative cementitious materials can reduce greenhouse gas emissions while supporting circular economy principles. The study concludes that integrating ACMs into concrete production is an approach for construction without compromising geotechnical performance or structural reliability.