Potential for sustainable utilization of dolerite rock processing dust to enhance geotechnical characteristics of expansive black cotton soil.

Dolerite, known for its aesthetic beauty and long-lasting durability, has been a cornerstone in the dimension stone industry for centuries. However, during the extraction and processing of this natural stone in the rock processing industries, dolerite rock dust, an often-overlooked by-product, is generated. This seemingly insignificant waste material is commonly viewed as a mere nuisance and discarded at dumping sites, resulting in significant health and environmental concerns in surrounding areas. As a result, there is a growing awareness of the importance of addressing this issue and exploring long-term sustainable solutions for dust control and reuse. Recent innovations in recycling and repurposing techniques align with the principles of a circular economy, transforming waste into a valuable resource and promoting economic prospects for the industry. In the pursuit of ushering in a new era of sustainability and resource efficiency, this study investigates the potential reuse of dolerite processing dust (DPD) in enhancing the geotechnical properties of expansive black cotton (BC) soils. The outcomes of the study reveal significant improvements in Atterberg limits, compaction properties, Swell index, as well as enhancements in unconfined compressive strength and California Bearing Ratio of DPD-treated BC soil. The incorporation of up to 20% dolerite processing dust (DPD) was identified as beneficial in enhancing the geotechnical properties of BC soil. This approach presents a greener and more sustainable application for DPD, marking a positive stride toward environmental responsibility and resource optimization. [ABSTRACT FROM AUTHOR]