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Expansive Cement
Expansive Cement

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Expansive Cement as a safe expansive demolition agent has been used safely and with great results

 

TECHNICAL MANUAL

 

Expansive Cement as a safe expansive demolition agent has been used safely and with great results by thousands of quarry owners, contractors and Homeowners all over the world. Safe use depends on following instructions and wearing safety goggles at all times. Although non-toxic, Non-explosive Demolition Agent is caustic, and can cause severe eye injury if splashed into the eyes while mixing or pouring. One cautionary note: With expansive demolition agents involves a phenomenon known as “blow-out shot”, This happens if the powder mix gets too hot and reacts with the water too quickly for the materials to expand laterally. The temperature can go above the boiling point of water before all the water has chemically combined with the Non-explosive Demolition AgentThis can result in a steam-driven explosion, which blows the Non-explosive Demolition Agent from the hole with sudden force. To avoid blowouts, follow the Instructions regarding mix water temperatures and hole sizes. Always wear safety goggles, and normally use drill holes 1 1/2" diameter. Blow dust out of holes after drilling, and keep Non-explosive Demolition Agent cool before use. 

 

HOLE PATTERN

 

1. Holes must be drilled so as to allow a free face for the Non-explosive Demolition Agent to push toward. For example, drilling at a 450 angle in a flat surface of ledge will push it upwards, but drilling straight down might not allow anywhere for the pressure to go.

2. To demolish a slab without pushing out the walls, which surround it, drill a cone shaped pattern at the center and fill these holes first. The cone will pop upwards and create a free face.

3. Hole pattern depends on tensile strength of what you're breaking, amount of rebar if any, and the size of the pieces you want when you're done. This can often be determined by experiment; a good starting point is to space holes one foot on center in rows one and a half feet on center. In non-reinforced concrete, holes may be spaced as far apart as 30 cm

4. Hole pattern also depends on how fast you need results. More holes spaced closer together will give faster break times and smaller pieces, but this costs more in labor and Non-explosive Demolition Agent 5. Boulders are much easier to break than reinforced concrete or ledge, and drill holes can be spaced further apart, especially if breaking speed is not critical.

6. Empty holes can also be used to direct cracks - they cost less than filled holes. For example, if you want to break a boulder into thirds. This will save money compared to filling all the holes, but will slow down the breaking time.

 

Keep Non-explosive Demolition Agent in storage. Choice the correct type for the weather.

 

Usage Tips:

 

1. Mix well and pour into holes while agitating the hole to make sure no air gaps are

in the hole.

2. Fill the hole almost to the top, leave at least 1/2 inch before reaching the top.

3. In the summer, the best time to use Non-explosive Demolition Agent is early in the morning or evening when temperature of material is low. High material temperature might cause blowout.

4. In the summer, cover holes to avoid direct sunlight. Example: using a tarp or wet hay.

5. In the summer, when it is very hot, you may put some ice into water, then mix with Non-explosive Demolition Agent 

6. Depending on the material, you may be able to mix Non-explosive Demolition Agent with more water to your lower cost if possible.

7. For better results, it is important to note both air and material temperature, Material temperature is the temperature inside of the rock or concrete which can be different from the air temperature. DO NOT GUESS! tie a strip the thermometer and lower it into the drill hole.

8. In winter, mix 1% calcium chloride with Non-explosive Demolition Agent. Example: 100 lbs of DEXPAN mix with 1lb of calcium chloride.

9. If Non-explosive Demolition Agent completely dried into powder and did not rack, pour additional water onto Non-explosive Demolition Agent filled holes.

10. Never fill glass or metal containers with Non-explosive Demolition Agent, or any container which widens towards the bottom.

11. Never pump Non-explosive Demolition Agent12. Mixing by hand lengthens mix time and is more likely to result in a blowout. When rock or concrete is above 730F, add 5 ounces of extra water per 5 kilo container (330, iced).

 

 

NOTES OF Expansive Cement  WORKING.

 

1. The most cost effective demolition technique for ledge is often a combination of Non-explosive Demolition Agent (to produce cracks) and a hydraulic hammer. Jack hammer, Drill holes can be spaced out further in this case.

2. The best way to demolish underwater rocks or concrete is to build a coffer dam and pump out the area. Non-explosive Demolition Agent hardens in fifteen to twenty minutes, and after that the area can be flooded again.

3. Non-explosive Demolition Agent must be used in holes; pouring it into existing cracks in rock will not work.

4. Safety goggles must be worn at all times by everyone in the area. Hard hats and steel-toed boots are a good idea on any construction or demolition site. As an added benefit, use of safety gear enhances your professional image in the eyes of the public, and avoids OSHA fines.

5. When using the usable temperature chart, bear in mind that the actual drill hole temperature may be much higher than the surrounding air temperature if it is in the sun or affected by nearby heat from machinery or from drilling the holes.

6. Cold temperature, hard rock, or holes spaced too far apart can lengthen breaking times. If it did not break overnight-wait a while before assuming failure. Non-explosive Demolition Agentcontinues to increase pressure for 24-28 hours

 

 

Oxide composition report (%wt)

SiO2

Al2O3

Fe2O3

Cao

5.1%

1.6%

2.5%

89.6%

98.8%

 

 

 

 

 

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