Omar Khalid
Plastic explosives are soft and hand-mouldable solid forms of explosive material. They are commonly used for shock hardening high-manganese percentage steel and in military applications. C-4, Semtex, and Composition C are some examples of plastic explosives. They are often odorized with taggant chemicals, which give them a sharp, acrid, and 'biting' smell, like badly burnt almonds.
| Characteristics | Values |
|---|---|
| Smell | Sharp, acrid, and biting, like badly burnt almonds. |
| Composition | RDX, plastic binder, plasticizer, and usually a marker or odorizing taggant chemical. |
| Variants | C-2, C-3, C-4, Semtex, PE-4, Nitrols, Nobel 808 |
| Texture | Similar to modelling clay |
| Detonation | Only possible through a shockwave, such as a detonator or blasting cap |
| Gases Released | Nitrogen, water, carbon oxides, and other gases |
| Velocity of Detonation | 8,092 m/s (26,550 ft/s) |
| Uses | Military, demolition, commercial blasting, shock hardening high manganese percentage steel, and train rail components |
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What You'll Learn
- C-4 is a common plastic explosive with a clay-like texture
- C-4 is highly stable and insensitive to most physical shocks
- Plastic explosives are used for shock hardening high-manganese steel
- Semtex is a plastic explosive invented in Czechoslovakia in the 1950s
- Explosives like TNT have a sharp, acrid, and biting smell post-detonation
C-4 is a common plastic explosive with a clay-like texture
C-4, or Composition C-4, is a plastic explosive that is widely used. It is a member of the Composition C family of chemical explosives, which includes C-2 and C-3. C-4 is composed of explosives, a plastic binder, and a plasticizer to make it malleable. It also usually contains a marker or odorizing taggant chemical.
C-4 has a texture similar to modelling clay and can be molded into any desired shape. This makes it ideal for explosive demolition, where it can be formed into shapes that can cut through structural members. It is also used in military demolition, where soldiers pack it into cracks and crevices to blow up heavy walls. Its malleability also allows it to be used in the reactive armor of tanks, where it is sandwiched between two plates of steel.
C-4 is a very stable explosive that is insensitive to most physical shocks. It cannot be detonated by a gunshot or by dropping it onto a hard surface. It also does not explode when set on fire or exposed to microwaves. Instead, it can only be detonated by a shockwave, such as the one produced by a detonator. When detonated, C-4 releases nitrogen, water, carbon oxides, and other gases, resulting in a powerful explosion.
C-4 is a common explosive used in terrorist attacks worldwide due to its stability, destructive power, and ease of smuggling. It has also been used in acts of domestic and state terrorism.
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C-4 is highly stable and insensitive to most physical shocks
C-4, or Composition C-4, is a type of plastic explosive that is commonly used in military applications. It has a clay-like texture and can be moulded into any desired shape, making it highly versatile for explosive demolition.
One of the key characteristics of C-4 is its stability and insensitivity to most physical shocks. This means that it is difficult to detonate unintentionally. For example, C-4 cannot be detonated by a gunshot or by dropping it onto a hard surface. It is also not susceptible to ignition from fire or exposure to microwaves.
The insensitivity of C-4 is due in part to the large amount of binder used in its composition. Tests have shown that even when subjected to rifle bullets, only a small percentage of C-4 samples burned, and none exploded. This stability is also attributed to the fine nitramine particles used in its composition, which help to absorb and suppress shock.
To detonate C-4, a combination of extreme heat and a shockwave is required. Typically, this is achieved by using a detonator or blasting cap, which creates the necessary conditions for a controlled explosion. The resulting explosion produces a shockwave that travels at a velocity of 8,092 m/s (26,550 ft/s), generating a powerful blast.
The stability and insensitivity of C-4 to physical shocks make it a relatively safe explosive to handle and transport, contributing to its widespread use in military and demolition applications.
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Plastic explosives are used for shock hardening high-manganese steel
Plastic explosives are soft and hand-mouldable solid forms of explosive material. They are commonly used for explosive demolition and include Semtex and C-4. C-4 is composed of explosives, plastic binder, plasticizer, and usually a marker or odorizing taggant chemical. It is very stable and insensitive to most physical shocks and can only be detonated by a shock wave.
The shockwave of explosive detonation generation and the interaction of metal produce intensive stress waves in the soils, which make and produce a hardening effect in the workpiece surface layer to a certain depth. The formula sequence of the mixed explosive is epoxy resin, ethylenediamine, dibutyl phthalate, and hexogen. The plastic sheet explosive is pasted to a thickness of 4mm. This method improves the surface hardness and wear resistance of high-manganese steel, improves operational efficiency, and saves a large amount of steel.
The first plastic explosive was gelignite, invented by Alfred Nobel in 1875. During World War II, the British used a plastic explosive as a demolition charge. This was Composition C, which was 88.3% RDX and 11.7% non-oily, non-explosive plasticizer. It was plastic between 0 and 40 °C (32–104 °F) but was brittle at colder temperatures and gummy at higher temperatures. One of the simplest plastic explosives was Nobel's Explosive No. 808, also known as Nobel 808 or Explosive 808, which had a distinctive smell of almonds.
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Semtex is a plastic explosive invented in Czechoslovakia in the 1950s
Plastic explosives are soft and hand-mouldable solid forms of explosive material. They are also known as putty explosives within the field of explosives engineering. The first plastic explosive was gelignite, invented by Alfred Nobel in 1875.
Semtex is a general-purpose plastic explosive used in commercial blasting, demolition, and certain military applications. It is very stable and durable, withstanding a temperature range of -40°C to 60°C, and is also waterproof. Its stability, explosive power, and extreme plasticity made it the primary explosive of the Warsaw Pact armies. It was also widely exported, notably to the governments of North Vietnam and Libya. However, its untraceability and unidentifiability made it notoriously popular with terrorists, and it became closely associated with terrorist attacks. This led to a decline in sales and stricter rules governing its export. Since 2002, all of Explosia's trading has been controlled by a government ministry, and a detection taggant has been added to produce a distinctive vapour signature to aid detection.
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Explosives like TNT have a sharp, acrid, and biting smell post-detonation
Plastic explosives are soft and hand-mouldable solid forms of explosive material. They are commonly used for explosive demolition, shock-hardening high manganese percentage steel, and in reactive tank armour. C-4 and Semtex are two examples of plastic explosives. C-4 is composed of explosives, plastic binder, plasticizer, and usually a marker or odorizing taggant chemical. It has a texture similar to modelling clay and can be detonated only by the shock wave from a detonator or blasting cap.
Semtex is a general-purpose plastic explosive containing RDX and PETN. It is used in commercial blasting, demolition, and certain military applications. Semtex is highly malleable and can be used over a greater temperature range than other plastic explosives, remaining plastic between −40 and +60 °C. It is also waterproof.
While I cannot find a definitive answer to the smell of plastic explosives, it can be assumed that they smell similar to TNT, which has a sharp, acrid, and biting smell post-detonation due to the presence of nitrogen oxides in the released gases.
It is important to note that the smell of explosives may not always be noticeable or detectable, and it is not recommended to rely on smell alone to identify explosives or their remnants.
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Frequently asked questions
Plastic explosives are odourless until detonated. After detonation, they are likely to smell sharp, acrid and biting, like badly burnt almonds.
Plastic explosives are a soft and hand-mouldable solid form of explosive material. They are especially suited for explosive demolition and include substances such as Semtex and C-4.
C-4 is made of explosives, plastic binder, plasticizer to make it malleable, and usually a marker or odorizing taggant chemical.
C-4 is odourless until detonated. After detonation, it releases nitrogen, water and carbon oxides, as well as other gases, which are likely to smell sharp and acrid.
