Using Limestone Mining Waste to Stabilize Expansive Soils in Ceará, Brazil

The article delves into the innovative use of limestone mining waste to stabilize expansive soils in Ceará, Brazil. It highlights the significant environmental and economic impact of the ornamental and building stone industry in the region, particularly the issue of waste disposal. The study focuses on the municipalities of Santana do Cariri and Nova Olinda, where limestone extraction generates substantial waste. The research explores the potential of this waste to mitigate soil expansion, a common problem in semiarid regions that can cause substantial damage to infrastructure. By conducting physical and mineralogical characterizations, along with oedometric tests, the study assesses the effectiveness of limestone waste in reducing soil expansion. The results demonstrate that waste can significantly decrease soil swelling and swelling pressure, offering a sustainable solution to both mining waste management and soil stabilization challenges. The article concludes by emphasizing the economic viability and environmental benefits of this approach, making it a valuable resource for professionals seeking innovative solutions in geotechnical engineering and waste management.