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Dynamite

Dynamite

Made of

NitroglycerinClayCharcoalPaper

Brief description

Dynamite is an explosive made of Nitroglycerin adsorbed onto an absorbent material (like diatomaceous earth or clay) and wrapped in a protective casing. It was invented by Alfred Nobel as a safer and more manageable alternative to liquid nitroglycerin.

Use / Function

  • Mining: Blasting through rock to reach ore veins.
  • Construction: Demolishing structures, clearing land, and digging canals or tunnels.
  • Infrastructure: Essential for building railways and roads through mountainous terrain.
  • Warfare: Used as a demolition explosive (though less common than TNT in modern times).

Operating principle

Dynamite works by stabilizing the highly sensitive Nitroglycerin.

  1. Adsorption: The liquid nitroglycerin is soaked into an inert, porous substance. This spreads the liquid out, preventing small shocks from causing a chain reaction.
  2. Packaging: The mixture is shaped into sticks and wrapped in heavy paper or cardboard.
  3. Detonation: Because it is stabilized, dynamite usually requires a “detonator” or “blasting cap” (a small amount of a more sensitive explosive) to trigger the main explosion.

How it is created

WARNING: Industrial manufacturing only. Handling high explosives is extremely dangerous and strictly regulated worldwide.

The production of dynamite involves the careful incorporation of stabilized Nitroglycerin into an absorbent base.

  • Preparation of Adsorbent: Traditionally, diatomaceous earth (Kieselguhr) was used for its high porosity and inert nature. Other materials like specialized clays, sawdust, or wood pulp can also be used in modern variations.
  • Mixing Process: The liquid explosive is added to the dry absorbent in controlled environments. This process must minimize friction and static electricity to prevent accidental ignition.
  • Forming and Packaging: The resulting explosive paste is extruded into cylindrical sticks and encased in moisture-resistant paper or plastic tubes.

Materials needed

  • Nitroglycerin: The explosive component.
  • Absorbent: Diatomaceous earth, Clay, or specialized wood pulp.
  • Charcoal: Sometimes added to adjust the oxygen balance or sensitivity.
  • Paper: For the cartridges.
  • Beeswax: Often used for waterproofing and sealing.

Variants and improvements

  • Guhr Dynamite: The original Nobel version using diatomaceous earth.
  • Gelignite: Nitroglycerin dissolved in nitrocellulose, forming a gelatinous, waterproof explosive.
  • Ammonia Dynamite: Replaces some nitroglycerin with ammonium nitrate to increase safety and lower costs.

Limits and risks

  • Exudation: Over time, nitroglycerin can “leak” or “sweat” out of the sticks, forming highly sensitive liquid droplets on the exterior. This makes old dynamite extremely hazardous.
  • Freezing: Pure nitroglycerin can freeze, which may lead to erratic behavior or increased sensitivity during handling if not properly managed.
  • Toxicity: Handling the material without protection can lead to severe headaches and cardiovascular effects due to the vasodilator properties of nitroglycerin.
  • Fuses: Used to trigger the detonator from a safe distance.
  • Drill Bit: Used to create holes in rock for the dynamite sticks.