Chapman-Jouguet Pressure
Definition
The detonation pressure at the reaction zone/product interface in a steadily propagating detonation. For ANFO at operational density, approximately 5 GPa (versus 30+ GPa for RDX). The lower CJ pressure reduces brisance and confines ANFO effectiveness to bulk charge applications in large-diameter boreholes.
Related terms
- Ammonium Nitrate Security Program (ANSP)
- A US DHS/CISA program mandated by the 2008 Farm Bill requiring registration of ammonium nitrate facilities and verification of purchaser identity. A...
- ANFO (Ammonium Nitrate Fuel Oil)
- A low-sensitivity bulk explosive mixture of prilled ammonium nitrate (94 per cent by weight) and fuel oil (6 per cent). The primary...
- DADP (Diacetone Diperoxide)
- A six-membered ring peroxide co-product of TATP synthesis. Less stable than TATP. Detected alongside TATP in post-blast samples where the synthesis conditions...
- EU Regulation 2019/1148
- The European Union regulation on the marketing and use of explosive precursors, restricting public access to hydrogen peroxide above 12%, nitric acid...
- HMTD (Hexamethylene Triperoxide Diamine)
- A peroxide explosive analogue of TATP, synthesised from hexamine (hexamethylenetetramine), hydrogen peroxide, and citric acid. Similar sensitivity profile. Detected by LC-MS/MS as...
- IMS Positive-Ion Mode
- An operating mode for ion mobility spectrometry instruments in which analyte ions are formed with positive charge through proton attachment or ammonium...
- India Ammonium Nitrate Rules 2012
- Rules promulgated under the Explosives Act 1884 by the Indian Ministry of Commerce and Industry, requiring PESO licences for import, manufacture, storage,...
- TATP (Triacetone Triperoxide)
- A cyclic peroxide explosive (C9H18O6) synthesised from acetone, hydrogen peroxide, and an acid catalyst. Sensitive to friction, heat, shock, and prolonged storage....
- Urea Nitrate
- An ionic explosive salt formed by neutralisation of urea with nitric acid. Detonation velocity approximately 3,400 m/s. Used in the 1993 World...
Explained in
- Improvised Explosives: TATP, ANFO, Urea Nitrate and Modern IEDsThe detonation pressure at the reaction zone/product interface in a steadily propagating detonation. For ANFO at operational density, approximately 5 GPa (vers...