Construction technology of stone grinding, polishing and crystallization

Release Date:2023-07-27 11:12

Among all natural and artificial stone floor materials, granite and micro-crystalline stone are the hardest and most wear-resistant materials to date.  They possess excellent stain resistance and acid-alkali resistance. However, after prolonged use, especially under the erosion of acid rain, thermal expansion and contraction during summer and winter, and weathering effects, granite and micro-crystalline stone floors can lose their luster or even get damaged.  Therefore, grinding, polishing, and crystallization treatment are crucial for the maintenance and restoration of their original beauty and durability.

The process of grinding, polishing, and crystallization treatment for granite and micro-crystalline stone floors can be divided into five main steps:

1.Coarse Grinding:Begin with using 50#or 150#resin-bonded diamond abrasive or 60#, 120#, and 220#magnesite blocks.Avoid using soft water grinding pads during coarse grinding to prevent waviness, which may affect the surface's flatness. Sufficient water should be used during this process, and each grinding pass should be thoroughly dried to check for deep scratches left by previous passes. Progressively use finer grits of abrasive materials, making sure the machine moves in a zigzag pattern during grinding. Coarse grinding constitutes 45%of the total grinding time and is crucial for ensuring the quality acceptance of the project.

2.Fine Grinding:Transition to 300#, 500#, and 1000#resin-bonded diamond abrasives.Fine grinding takes up 35%of the total grinding time. After reaching 500#, the floor should start showing an initial gloss, and the gloss can reach 50 degrees after reaching 1000#.

3. Polishing: Use 2000#and 3000#resin-bonded soft water grinding pads. Polishing takes up 20%of the total grinding time. While polishing may not significantly increase the gloss level, it enhances the surface density of granite and micro-crystalline stone, creating a solid foundation for the subsequent polishing process with polishing powder A5 or polishing slurry(mixed with A2A5 modifier).


4. Polishing: Employ a crystal surface machine with a power of 2HP or above, rotating at 175-210 revolutions per minute, and use animal hair pads with a composition of 70%animal hair, 3M pads, or nano pads. Combine these pads with polishing powder A5 or slurry(mixed with A2A5 modifier)for polishing. After polishing, the gloss on the surface of the granite and micro-crystalline stone can exceed 90 degrees.

5. Crystallization Hardening Treatment: Utilize a crystal surface machine with a power of 2HP or above, rotating at 175-210 revolutions per minute. Attach a clean pad(white or red)and 3M pads or nano pads. Spray crystal hardener A2 evenly onto the surface of the granite and micro-crystalline stone using a spray bottle. Then, start the crystal surface machine, walking it across a 1.5-meter-wide and 1.5-meter-long area, repeating the process six times. The friction generated between the 3M pads, nano pads, and the crystal hardener A2 will cause ion exchange, resulting in the formation of a crystalline layer of nano inorganic polymer. This layer exhibits a glassy texture, high hardness, wear resistance, and transparency, as well as properties such as water resistance, stain resistance, and slip resistance.

The construction technology of stone grinding, polishing, and crystallization treatment is a comprehensive process designed to maintain and restore the beauty and durability of granite and micro-crystalline stone floors. Each step plays a vital role in achieving the desired results, from coarse grinding to crystallization hardening treatment. Proper execution of these steps ensures that the stone floors not only retain their luster and appearance but also acquire enhanced resistance to wear, stains, and other environmental factors. This advanced technique in stone floor maintenance ensures long-lasting performance and aesthetics, making it an essential practice in the industry.

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