How to Use Expansive Mortar for Rock or Concrete Demolition

How to Use Expansive Mortar for Rock or Concrete Demolition

Expansive mortar is a powerful, non-explosive solution for breaking concrete and rocks quietly and safely. Whether you're removing boulders, demolishing concrete foundations, or quarrying natural stone, expansive mortar offers a reliable alternative to traditional blasting methods. In this article, we’ll guide you through the correct steps to use expansive mortar efficiently and effectively.

What You Need Before Starting

Before applying expansive mortar, make sure you have the following equipment and tools:

• A hammer drill with the appropriate diameter drill bit

• Safety goggles, gloves, and a dust mask

• A clean mixing bucket

• A mixing stick or drill mixer

• Water (preferably cold)

• Measuring tools

• Expansive mortar (like SUPERDRILL brand)

Step 1: Drill Holes

Use a hammer drill to make holes in the rock or concrete. The pattern and size of the holes depend on the type and size of the material you're breaking.

Hole Diameter: Usually 30mm to 40mm
    Hole Depth: 80% to 90% of the material thickness
    Spacing Between Holes: 10 to 40 cm depending on the material hardness

Tip: The holes should be clean and free of debris before applying mortar.

Step 2: Mix the Expansive Mortar

In a clean bucket, pour the expansive mortar slowly into water while stirring continuously. Follow the ratio instructions from the manufacturer—usually about 3 parts powder to 1 part water by weight.

Mixing Tips:

• Use cold water to delay premature expansion

• Stir for 2–3 minutes until the mixture is smooth and lump-free

• Do not remix or reuse after it starts to harden

Step 3: Pour the Mortar into the Holes

Immediately after mixing, carefully pour or funnel the mortar into each hole. Fill each hole up to the top, and make sure the mortar stays level to maximize pressure.

Do not overfill. Expansion starts within 30 minutes to 2 hours depending on temperature.

Step 4: Wait for Expansion and Cracking

The expansive mortar will gradually generate high internal pressure and cause the rock or concrete to crack. This usually happens between 2 to 12 hours after application, depending on the ambient temperature and material density.

Cracking Time (estimates):
 Hot climates: 2–4 hours
 Mild climates: 4–8 hours
 Cold climates: 8–12 hours

Do not attempt to speed up the reaction by applying heat. Let the process complete naturally.

Step 5: Remove Broken Material

After the cracks appear, use a pry bar, pickaxe, or excavator to remove the broken chunks. You’ll find the material separates easily along the fracture lines.

Safety Tips

• Always wear protective gear

• Do not look directly into holes during reaction

• Avoid standing near filled holes while cracking is occurring

• Store unused mortar in a dry, cool place

Why Choose SUPERDRILL Expansive Mortar?

SUPERDRILL expansive mortar is a trusted product used by construction and mining companies worldwide. It offers:

• Reliable and consistent cracking performance

• Fast reaction under various temperatures

• Eco-friendly and safe handling

• Competitive pricing for bulk orders

Learn more about our product:
 https://www.superdrill.cn/product/Expansive-Mortar.html

Conclusion

Using expansive mortar for rock or concrete demolition is simple, safe, and highly effective. With the right preparation and correct application, you can complete demolition tasks without noise, vibration, or explosives.

Need help or a quote? Contact SUPERDRILL today and speak with our technical experts:
 https://www.superdrill.cn/contact-us.html