Optimization of grading of sand in васkfill using metallurgical waste

Abstract

It is technologically and economically advisable to optimize grading of low-quality fine and very fine sand with increased content o f clay and dust particles used in preparation o f cemented backfill mixtures by adding blast-fumace granular slag screenings 0-5 mm in size without preliminary treatment. The relationships of the size modulus, specific grain area and clay/dust particle content of sand and the percentage of slag in the composite aggregate are obtained