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A Historic Revolution in Black Limestone Paving Slabs Production

1. Introduction

The black limestone paving slabs industry is undergoing a major transformation with advancements in composite panel production. As a natural, noble, and elegant building material, marble composite boards are rapidly gaining popularity among users and construction companies. They are expected to replace traditional materials like ceramic tiles, floors, and glass, becoming a symbol of high-end luxury decoration.

This breakthrough in curing technology on wet surfaces offers significant advantages to composite panel manufacturers and users, including:

• Energy savings
• Process simplification
• Lower labor costs
• Reduced equipment investment
• Lower overall production costs

This advancement represents a historic revolution in the composite board industry!

2. Research & Development Breakthrough

The R&D team at Changsha Dehang Adhesives Co., Ltd. conducted over two years of research and testing, leading to major breakthroughs in composite panel adhesion.

Experimental Verification

The experiment was conducted to test adhesion performance on various materials, including:

• Middle brown net
• Deep brown net
• Magenta
• Atayal beige
• Travertine
• Spanish beige

The ceramic tiles used for composite boards were sourced from Foshan, a key production hub.
Water immersion test: The tiles and limestone slabs were submerged for 72 hours before bonding.

3. Step-by-Step Bonding Process

Step 1: Pre-treatment

• Remove the black limestone paving slabs and tiles from water.
• Let them stand for 15 minutes.
• Dry the surfaces with a cloth.

Step 2: Glue Application

• Apply adhesive evenly on the tile surface.

Step 3: Composite Layering

• Press the tiles onto the black limestone paving slabs.
• Apply bolts to ensure firm bonding.

Step 4: Curing Process

• Condition 1: Normal temperature curing at 28°C for 24 hours.
• Condition 2: Heat curing at 80°C for 3 hours, followed by water rinsing, cooling, and immediate testing.

4. Testing Methods & Results

Test 1: Alignment & Stability Check

• Both curing conditions showed perfect alignment between tiles and marble.
• Travertine samples with excess moisture caused slight misalignment, which was resolved by extending the drying time (30-60 minutes) before bonding.

Test 2: Impact Strength Test

• The composite board was placed upright, and a hammer was used to test impact strength.
• In every case, tiles or marble cracked, but the bonding layer remained intact, proving that the adhesive strength exceeded the material strength.
• The 80°C heat-cured samples showed even better performance.

Test 3: Extreme Temperature & Water Resistance

• The composite boards were subjected to:
  • 90-100°C hot water for 7 days (168 hours).
  • -15°C freezing for 48 hours.
  • 100°C oven drying for 12 hours, followed by natural cooling.
• Results:
  • No misalignment occurred.
  • Drop tests showed zero separation between tiles and limestone.
  • Bonding strength remained intact, proving the adhesive's reliability.

Conclusion

The D-1518AB adhesive has been proven to be completely effective for bonding on wet surfaces, making it a game-changer in the black limestone paving slabs industry!