Characteristics of Environmentally Friendly Concrete Made from Tailings with the Addition of Sika Grout 215 New

With the rapid development of the construction sector, demand for construction materials is also rising, while natural material reserves are declining. To anticipate this, it is crucial to find alternative materials for concrete production, such as waste materials. The increase in mining and ore processing activities generates tailings waste, which can become an environmental burden if not properly managed.
The purpose of this study was to examine the characteristics of concrete using tailings waste as a sand substitute, with the addition of Sika Grout 215 as an additive. The tailings substitution for sand was 0%, 10%, 15%, and 20%.
The results showed that Sika Grout 215 New did not significantly increase the concrete's compressive strength. The use of tailings in the mixture affected the concrete's characteristics: the higher the tailings percentage, the longer the initial and final setting times. The compressive strength increased to an optimum of 26.31 MPa at 15% tailings substitution. The density increased, and the absorption rate decreased.
The results demonstrate the potential of tailings waste as an environmentally friendly, sustainable construction material.