INFLUENCE OF PHYSICAL PROPERTIES ON AMMONIUM NITRATE ON THE DETONATION BEHAVIOUR OF AMMONIUM NITRATE AND ACTIVATED CARBON MIXTURES

摘要

After the accidental explosion in Toulouse in 2001, the demand of the detail information on the detonation characteristics of ammonium nitrate has been increasing. To obtain a better understanding of detonation characteristics of ammonium nitrate (AN) and activated carbon (AC) mixtures steel tube test was carried out for various composition of different kinds of AN and AC mixtures and detonation velocity was measured. As a result of test powdered AN when mixed with AC showed higher detonation velocity than other type of AN such as prilled, phase stabilized and granular AN in a steel tube with the diameter of 35 mm and the length of 350 mm. Experimentally observed detonation velocities of all kinds of AN/AC compositions for each loading density were far below the theoretically predicted values calculated by the thermohdrodynamic CHEETAH code and they showed so-called a non-ideal detonation. Furthermore, to investigate the particle diameter effect of prilled AN, steel tube test was also carried out for sieved prilled ANs. It was found that the particle diameter has a strong influence on the detonation velocity of AN/AC mixtures.