jackhammers, polymers, and diamonds: new applications in explosives
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Jackhammers, Polymers, and Diamonds: New Applications in Explosives. Dr. Christa Hockensmith Energetic Materials Research and Testing Center, New Mexico Institute of Mining and Technology, Socorro, NM 87801. Explosives. What is an explosive? - PowerPoint PPT PresentationTRANSCRIPT
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Jackhammers, Polymers, and Diamonds: New Applications
in Explosives
Dr. Christa Hockensmith
Energetic Materials Research and Testing Center,
New Mexico Institute of Mining and Technology,
Socorro, NM 87801
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Explosives• What is an explosive?
• An explosion releases enormous amounts of energy from a chemical reaction of explosive materials.
• The power of an explosion comes from the extremely short amount of time (~1/100 second or less) during which heat and gas are generated.
• Characteristics:• Exothermic reaction• Extremely high temperatures• Extremely high pressures• Blast or pressure wave present…the damaging agent
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The Impact of Explosive Energy at 0 ms and after 19 ms to a cinder block wall
protected with a steel plate
John E. Crawford, Karagozian & Case, USA and Shengrui Lan, Karagozian & Case, USADESIGN AND IMPLEMENTATION OF PROTECTIVE TECHNOLOGIES FOR IMPROVING BLAST RESISTANCE OF BUILDINGSEnhancing Building Security Seminar, March 23, 2005, Singapore
Test 6 Interior_full.wmv
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Uses of Explosives
• 1. the usual…munitions, bombs,
fireworks, explosive materials for
the military, mining, excavations,
roads, demolitions, etc.
• 2. the unusual…power tools, diamonds,
polymeric tools, the untested ideas.
• 3. let’s look at them one at a time:
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Explosive-assisted Tools
• 1. Many tools are powered with hydraulic fluids or compressed air.
• 2. Therefore, compressors and fluid lines must be available at the site where the tools are used.
• 3. Explosive cartridges can be used to power the tools (create pressure so the tool functions) eliminating compressors and fluid lines.
• 4. Tools then have mobility not previously available.
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Schematic for Explosive-powered Jack Hammer
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Other Explosive-powered Tools
• 1. nail guns, on-site machining tools, spray guns, chipping tools,and various other tools ordinarily powered with air or fluids.
• 2. explosive-powered toolscan also be used to giveeasier access to inaccessible, recreation or search sites.• 3. An explosive-powered pininsertion tool could be used in rock climbing or rescueoperations.
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Production of Industrial Diamonds
• Almost 220,000 lb are synthesized annually for use as abrasives, cutting edges, in grinding wheels, and in the mining industry (drill bits).
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Industrial Diamond Production with Explosives
• 1. A canister is packed with carbon and enclosed with explosives at the manufacturer’s facility…diamonds are naturally formed by pressure and heat.
• 2. The pressure wave and heat from the explosion creates the pressure and temperature needed to produce industrial diamonds.
• 3. The canister explosives are detonated with explosives on the exterior of the canister.
• 4. The canister containing reacted carbon is shipped unopened to the manufacturer and new canisters are received.
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Explosive-aided Polymers
• 1. polymeric materials are used as a coating around other chemicals that are to be delivered during a manufacturing process.
• 2. a small explosive charge ruptures the polymeric exterior coating freeing the chemicals for delivery at the appropriate place and time.
• 3. polymeric coating protects the deliverables and increases shelf life during storage.
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More Explosive-aided Polymers• 1. Medical supplies such as electrolytes and nutritional
supplements in solution are packaged in plastic containers.
• 2. Shipping, handling, and heat may deform the containers.
• 3. A small explosive charge can create enough inert gas to reshape the container.
• 4. A filter prevents contamination of medical solutions.
• 5. Inert gas prevents leakage, loss of sterility, and decreases the amount of polymer necessary for container manufacture.
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The Untried and Untested
• 1. A very large explosive detonation can create industrial diamonds. What about small detonations?
• 2. Very small detonations could destroy tumors…except many tumors have high vascularization.
• 3. Small detonations that implode rather than explode the tumor may prevent uncontrolled bleeding and the body will clear the debris.
• 4. Even smaller detonations may clear plugged arteries and blood vessels without running balloons through those vessels.
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The Untried and Untested• 5. Partial inflation of devices such as life rafts,
automobile air bags, parachutes, etc. for testing and repair.
• 6. Single detonations of these devices partially inflate
and multiple detonations fully inflate.
• 7. Small tab attached to food trays or popcorn bags is pulled and detonates explosive lining in bag or tray. Food is cooked/warmed as necessary for serving without chemical reactions that leave waste chemicals behind.
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EMRTC Thanks you for your Attention
• Please visit us at www.emrtc.nmt.edu
• We are sponsoring an Explosives Camp for students 16 years and older June 21-27, 2009. Please contact us for more information on this program:
• 575-835-5348 or 5492