Integration of clayey materials in the engineered covers and improvement of their performance evaluation techniques

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The extraction of mineral resources plays an important role in the Canadian economy. However, while removing these valuable commodities, large volumes of waste are often generated. These wastes have the potential to adversely impact the environment if not properly managed. Special attention is required when the wastes contain iron sulfide minerals. The oxidation of sulfides by atmospheric oxygen tends to lead to the acidification of meteoric waters; this phenomenon is known as acid mine drainage (AMD). In these situations, actions must be taken at the mine site to prevent environmental impacts caused by AMD. Different management options and rehabilitation strategies are available to inhibit AMD production. Despite the development of these techniques, there is still work that must be performed to improve their performance both technically and economically.