Geochemical processes can drive gradual but significant changes in the physical properties of construction materials used in tailings storage facilities, with potential implications for long-term stability and performance. This presentation examines the types of geochemical reactions—such as mineral dissolution, precipitation, weathering, and cementation—that may alter strength, permeability, drainage performance, and material behavior over time.
Drawing on industry observations, published case examples, and conceptual models developed through MEND- and INAP-supported research, the presentation outlines key risk factors, conditions that influence reaction rates, and where these changes are most likely to occur within a facility. It also discusses practical considerations for material selection, design, and monitoring to help identify and manage geochemically driven geotechnical risks over the full service life of a structure.
