Breaking Rock or Concrete Using Dexpan - Keys to Success
Alternatives to Blasting & Jackhammering to Break Concrete
Okay, so you have decided to use Dexpan as an alternative to blasting, hydraulic breakers or jack hammering.
Maybe the nature of your project or surrounding environment made tool or machinery access difficult (hard-to-reach places, confined space or underwater). Maybe traditional methods or equipment will cause damage, noise, dust, pollution, danger or inconvenience to the surrounding environment.
Regardless of the reason, it is time to get the job done.
Instructions for Using Dexpan - Keys to Success
Below are a number of Keys to Success when using Dexpan to:
- ensure safety
- improve the effectiveness of the product
- save you time, aggravation and money
1. Correct Product
Select the correct Dexpan product (Dexpan I, Dexpan II, Dexpan III) based on material temperature and anticipated ambient temperature conditions.
Dexpan I 25 - 40 °C (77 - 104°F)
Dexpan II 10 - 25 °C (50 - 77°F)
Dexpan III -5 - 10 °C (23 - 50°F)
2. Drilling Pattern
A well-designed hole-drilling pattern will minimize consumption of Dexpan and improve performance. Click HERE for Drilling Patterns within our User Guide or CONTACT us, we will be happy to help.
3. Drilling Depth
Drill between 80 to 90% of the depth. Do not drill completely through the material.
NOTE: Product is most effective in materials at least 6" deep.
4. Expansion Space
Dexpan requires free space to expand into. Ensure there is sufficient empty space around the rock or concrete to be demolished to allow the material space to break apart.
a) breaking apart rock or concrete submersed in the earth does not allow for free space. In this case, a trenching drill will be required to remove material around the case.
b) In other applications, creating a series of empty holes may be advisable.
5. Pouring
Fix the holes within 10 to 15 minutes of mixing. During the summer, the best time to pour Dexpan is in the morning or evening when the material temperature is cooler.
6. Avoid Air Bubbles
Gradually pour the mixture into the holes to ensure no air gaps are trapped within. Poke a stick or rod down the hole if necessary.
7. Protect Against Blowouts
Cover holes from direct sunlight to avoid blowout. As necessary, use a tarp or damp hay to provide shade.
8. Breaking Time
Depending on ambient temperature, humidity and material hardness it takes 24 hours to allow for full expansion, but expansion may continue for an additional 24 to 36 hours.