Explosive Power or Strength

The power, or strength of an explosive, is one of the most iihportant properties of interest to the user. It is usually expressed in terms of power per unit weight, which is appropriate for comparing explosives used in charges measured by weight. It can alternatively be expressed as power per unit volume, which is appropriate for explosives which are used to fill boreholes of a given size. The relation between the two depends solely on the density, so that the one is readily calculated from the other. 

Taylor (1952), Measurement of Detonation by Dautriche (pp 24-28) and by Rapid-Photography Methods (28-32) Heat of Explosion by Calorimetric Bomb (40-2) Temperature of Explosion (43-7) Power or Strength of High Explosives by Trauzl Lead Block Test, Ballistic Mortar Test and pendulum Test (185-86)... 

Measurement of power (or strength) of HE s by Trauzl Test, Pendulum Test and Ballistic Mortar Test) 14) Anon, " Military Explosives , TM 9-1910 (1955), 68-71 (Definition of "power and description of tests) 14a) W.E. Gordon et al,... 

Detonation Processes Properties of Explosive Affecting Them. This is a very broad subject and might include Chapman-Jouguet parameters (See Table under "Detonation, Chapman-Jouguet Parameters in ), thermohydrodynamic properties, brisance, density, power or strength, pressure of detonation, temperature of detonation, sensitivity to impact, sensitivity to initiation and detonation velocity... 

Chapter 6, 1 Assessment of Explosives", which includes Power or Strength (pp 65-8) Velocity of Detonation (69-72) Sensitiveness, to Friction and to Impact (72—6) Stability on Storage (76—8) Fume Test (78—9) and Miscellaneous Tests, such as for. Brisance and Speed of Gelatinization of NC (79—80). Chapter 7 Gallery Testing of Permitted Explosives (85—9)... 

Pouvoir ou Force des explosifs, Essais (Power or Strength of Explosives, Tests),... 

The power or strength of an explosive is a measure of its ability to do useful work. This is also termed the potential of an explosive and is the total quantity of heat given off by an explosive at constant volume. The volume of gas (V) and heat of explosion (Q) can be calculated independently. The explosive power of an explosive is then obtained on multiplying Q with V that is, (Equation 1.15) ... 

Available Energy in Detonation (and Explosion), also called Maximum Available Work Potential. See under Detonation (and Explosion) Power, Available Energy (or Maximum Available Work Potential) and Strength in ... 

Detonation (or Explosion), Power Available Energy (or Maximum Available Work Potential) and Strength in. 

The explosive power of picric acid is somewhat superior to that of -> TNT, both as regards the strength and the detonation velocity. Picric acid is prepared by dissolving phenol in sulfuric acid and subsequent nitration of the resulting phenoldisulfonic acid with nitric acid or by further nitration of dinitrophenol (prepared from dinitrochlorobenzene). The crude product is purified by washing in water. 

The strength of an explosive is its most important characteristic and is a measure of the conversion of its exothermic energy of combustion into mechanical disruption or power. The strength is usually... 

Ballistic Strength. 100% T NT (BuM ine s) Explosion Temperature. Does not expld or ignite at 360° or below Heat of Combustion. 8l8.1kcal/mole Hygroscopicity. Practically none Impact Sensitivity. Comparable to TNT Power. By Trauzl test, 103% TNT Rifle Bullet Test. No detonations from impact of. 30 cal bullet at 90 ft Thermal Stability. Unsatisfactory, loses 49% of wt in 48 hrs at 75° (International Test) Velocity of Detonation. No information Salts of (m-Nitrophenyll-dinitromethane. Milone and Massa (Ref 2) prepd several metallic salts and found that their expl power decreased with increasing atomic v/t of the metal Following are some of the expl salts K salt—yel crysts ... 

The maximum potential power of an explosive can be calculated, or it can be measured by techniques such as those developed by Cook. A typical method consists of firing the explosive under water and measuring the energy liberated in the various forms, such as shock wave in the water, the work of expansion of the gas bubble, etc. These figures have limited practical value as the methods of application of explosives are of low and variable efficiency. A more practical measurement of strength can be obtained by the measurement of cratering efficiency. This, again, demands considerable expense and also requires the availability of uniform rock. 

Explosion Strength or Power. As regards energy content and high deton velocity, NGc occupies first place by the customary methods... 

Physiological Properties. See under Toxicity Power. See under Explosive Strength Pressure Developed on Explosion of One Kilogram in One Liter— I2498kg/cm2 for NGc vs 12048 for NG (Ref 6, p 298 Ref 19, p 132) Reaction on Explosion, See Decomposition (or Explosion) Equation... 

In addition to aluminium, calcium silicide or ferro-silicon, the use of silicon was also recommended. The comparative figures illustrating the effect of the addition of these compounds on the strength of the explosive have been given by Sar-torius [70] (Table 59). The power is expressed in terms of expansion in the lead block (taking picric acid as 100). 

Perchloric acid is extremely hygroscopic and is a very powerful oxidizer. Contact of organic materials with anhydrous or concentrated perchloric acid can lead to violent explosions. For this reason, the application of perchloric acid has serious limitations. The acid strength, although not reported, can be estimated to be around //0 —13 for... 

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