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Adhesives Technology The Cracker 11lb CRKR Case 4
THE CRACKER is a non-explosive expansive demolition powder mixed with water and poured into pre-drilled holes to split concrete, rock, and masonry. Virtually noiseless and vibration-free for indoor or outdoor work where blasting is not permitted.
- Indoor and Outdoor Use, Dry or Humid
- Where Blasting or Heavy Equipment Is Not Allowed
- Crack Development in 2 to 4 Hours at 75°F
$575.50
Availability:
In stock
Drop Shipped Adhesives Technology THE CRACKER Non-Explosive Demolition Agent, 11 lb
THE CRACKER from Adhesives Technology is a non-explosive expansive demolition powder mixed with water and poured into pre-drilled vertical holes to split concrete, rock, and masonry. It is virtually noiseless and vibration-free, so crews use it indoors or outdoors in dry or humid conditions where blasting is not permitted or heavy equipment is impractical. Typical crack development is 2 to 4 hours at 75°F.
Key Features
- Non-explosive splitting of reinforced concrete and hard stone
- Virtually noiseless and vibration-free for indoor or sensitive sites
- Indoor and outdoor use in dry or humid conditions
- Used where blasting or heavy equipment is not permitted
- Initial cracking in 2 to 4 hours at 75°F
- Vacuum-packed powder for vertical hole placement
Applications
- Indoor and outdoor concrete demolition
- Sites where blasting is not permitted
- Locations inaccessible to typical demolition equipment
- Rock and masonry splitting
- Sensitive sites where noise or vibration is unacceptable
Technical Specifications
| Property | Value |
|---|---|
| Chemistry | Non-explosive expansive demolition powder |
| Part number | CRKR |
| Color | Concrete gray |
| Expansion pressure | Over 8,500 psi (59 MPa) within 24 hours |
| Initial cracking at 75°F | 2 to 4 hours |
| Coverage per bag | 7.5 lin ft of 1 1/2 in. holes; 10 lin ft of 1 1/4 in. holes |
| Hole diameter | 1 1/2 in. below 73°F; 1 1/4 in. at 73°F and above |
| Mix water per bag | 33 oz below 73°F; 39 oz at 73°F and above |
| Substrate temperature | 32 to 100°F (0 to 35°C) |
| Minimum hole depth | 4x diameter; 7 1/2 in. cold / 6 in. warm |
| Shelf life | 36 months unopened, 40 to 95°F |
| Packaging | 11 lb (5 kg) bag, case of 4 |
Product documents: THE CRACKER Technical Data Sheet (PDF) | THE CRACKER Safety Data Sheet (PDF)
Frequently Asked Questions
Can THE CRACKER be used indoors where blasting is not allowed?
Yes. THE CRACKER is a non-explosive expansive powder used where blasting is not permitted, where heavy equipment cannot reach, or where noise and vibration are unacceptable. Indoor demolition of concrete is a primary listing.
Does THE CRACKER work in humid conditions as well as dry?
Yes. THE CRACKER is listed for indoor and outdoor use in either dry or humid environments. Humidity is not the stop. Mixing-water temperature versus substrate temperature is what the sheet controls, not air humidity.
Does THE CRACKER belong in vertical holes rather than open horizontal pours?
Yes. THE CRACKER is a vacuum-packed powder placed in vertical or slightly downward-sloped holes. Holes that punch through the member will let the mix run out. Do not pump it. Do not funnel it. Vertical-hole placement is how the expansion is confined.
How does time-to-crack for THE CRACKER change with substrate temperature?
At about 75F, THE CRACKER typically shows initial cracking in 2 to 4 hours. Colder substrates stretch that toward 12 to 48 hours. Warmer substrates can crack in 1 to 3 hours. Measure the concrete or rock temperature and match mixing water to Table 2 on the current sheet.
Can THE CRACKER be used where vibration has to stay off an adjacent structure?
Yes. Compared with conventional demolition, THE CRACKER is virtually noiseless and free from vibration. That is why it is used next to occupied buildings, sensitive equipment, and sites that cannot take blasting or a hoe-ram.
Does THE CRACKER need a free edge or relief face to break toward?
Yes. Like a blast, THE CRACKER needs an area of least resistance, a free edge, toward which it can break. In bedrock or a slab with no free edge, a small opening is cracked first to give relief, then the remaining holes are filled.
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