Overburden Recycling in Manufacture of Composite Materials for Road Construction at Mines
D. V. Bespolitov, N. A. Konovalova, P. P. Pankov, N. D. Shavanov
Trans-Baikal Institute of Railway Transport, Chita, 672040 Russia
Keywords: Mine road, dedusting, waste recycling, overburden, fly ash, mechanical activation, composite material, stabilizer
Abstract
The authors discuss feasibility of high-tonnage direct inclusion of overburden in composites for the construction of road layers at mines. It is found that overburden has a strength as per State Standard GOST 23558-94 and the prolonged dedusting effect. The optimal contents of the binder and fly ash are 8 and 10% by mass, respectively. Mechanical activation of fly ash for 1 min enlarges its specific surface by 2 times. The frost-resistant composites modified with mechanically activated fly ash and stabilizer (1% by mass) have the strength grades M20-M40.
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