How Does Non Explosive Demolition Agent Work?

Chemical mixtures that expand on setting in drilled holes to split rock

Non-explosive demolition agents are chemicals that are an alternative to explosives and gas pressure blasting products in demolition, mining, and quarrying.[1] To use non-explosive demolition agents in demolition or quarrying, holes are drilled in the base rock as they would be for use with conventional explosives. A slurry mixture of the non-explosive demolition agent and water is poured into the drill holes. Over the next few hours the slurry expands, cracking the rock in a pattern somewhat like the cracking that would occur from conventional explosives.

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Non-explosive demolition agents offer many advantages including that they are silent and do not produce vibration the way a conventional explosive would. In some applications conventional explosives are more economical than non-explosive demolition agents. In many countries these are available without restriction, unlike explosives which are highly regulated.

The active ingredient is typically calcium oxide, "burnt lime," and is typically mixed with Portland cement and modifiers.

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These agents are much safer than explosives, but they have to be used as directed to avoid steam explosions during the first few hours after being placed.

Typical applications / parameters Application Parameter Usage amount (kg/m3) Aperture (mm)[clarification needed] Pitch-row (cm)[clarification needed] Array pitch (cm)[clarification needed] Bore depth Light Rock 30–45 30–50 30–50 H[clarification needed] 8–10 Medium-hard Rock 30–45 25–40 20–35 1.05H 10–15 Hard Granite 35–45 20–40 20–30 1.05H 18–20 Rock Cutting 30–40 20–35 50-80 H 5–15 Unreinforced Concrete and Boulder Stones 35–50 20–30 25–35 0.9H 8–15 Reinforced Concrete 30–45 15–25 15–25 H 15–25

Many patents describe non-explosive demolition agents containing CaO, SiO2 and/or cement.[2]

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See also

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• Plug and feather
• Explosive material
• Mining

Dexpan® Non-Explosive Demolition Agent / Expansive Grout is a cement with an amazing 18,000 PSI expansive strength when mixed with water. Poured into the same holes explosives are traditionally placed in, Dexpan® breaks, cracks, and splits reinforced concrete and rocks safely.
As an alternative to explosive blasting, traditional demolition tools, and quarry mining equipment, Dexpan® works without the worries of noise, explosions, air blasts, ground vibrations, flying rocks, and dust.
Dexpan® does not require permits, special training, or high-cost insurance. It is safer, easier, and more cost effective than its alternatives.

• 3 easy steps to use: drill, mix and pour. (How to use Dexpan?)
• Controlled demolition and easy clean up.
• Works without explosion, noise, vibration or dust
• Top 5 Benefits for Demolition Contractors
• Top 5 Benefits for Stone Quarrying

What can Dexpan help you with? Concrete Demolition, Cutting, Breaking and Removal (Click to see hundreds of job photos) Rock Splitting, Cracking, Breaking and Excavating (Click to see hundreds of job photos) Mining and Quarrying Stone, Granite, Marble, Limestone, Sandstone (Click to see hundreds of job photos) Underwater Projects (Click to see hundreds of job photos) Depending on rock / concrete temperature, there are 3 types of Dexpan®: Dexpan® I – (usable temperature of F° 77 ~ 104 or C° 25 ~ 40)
Dexpan® II – (usable temperature of F° 50 ~ 77 or C° 10 ~ 25)
Dexpan® III – (usable temperature of F° 23 ~ 50 or C° -5 ~ 10) Dexpan is available in 3 types of packing: