INEXPLOSIVE DESTROYING COMPOSITION Russian patent published in 2000 - IPC

FIELD: stone cutting industry; construction of foundation pits, driving of working in construction of subway, breaking and destruction of monolithic objects in mining. SUBSTANCE: composition contains, %: boric acid 0.25-1.9; sodium nitrite 1.3-4.6; technical modernized lignosulfonate 0.1-0.4; the balance, finely divided calcium oxide of 96% concentration produced from mixture of burnt limestone and calcined gypsum taken in ratio of (1:1)-(1: 0.8). EFFECT: higher efficiency of breaking and dressing of rock and other monolithic materials at low temperatures from plus 5 to minus 15 C due to hydration temperature rise and pressure. 1 dwg, 2 tbl