Should i wet concrete before grinding?

Should i wet concrete before grinding?

The answer is: not necessarily; it depends on whether you choose "dry grinding" or "wet grinding." Both methods are used in hardened floor construction, each with its own considerations.

 

Let us compiled their advantages, disadvantages, and applicable situations into a table for clarity:

 

 

Comparison Dimensions	Wet Grinding (with water)	Dry Grinding (without water)
Core Advantages	High grinding efficiency; water cools and lubricates, making the grinding discs sharper and faster. The ground is smoother and finer	The site is clean; dust is collected directly by a vacuum cleaner, facilitating cleaning and waste disposal. Polishing can be done immediately after applying the hardener, without waiting for the floor to dry, resulting in a tighter construction schedule.
Main Disadvantages	Generates a large amount of slurry, requiring time to handle and raising concerns about sewage disposal. If used on floor slabs, be wary of water leakage and contamination of floors below. The floor must be completely dry before polishing, extending the construction period.	Generates a large amount of dust, requiring a high-powered industrial vacuum cleaner, placing high demands on equipment and sealing. The high temperature of grinding accelerates disc wear, potentially increasing costs.
Suitable Scenarios	floors or ground-floor factories, where wastewater can be easily handled and leaks are not a concern.	Outdoor Most indoor floors, especially those in upstairs apartments (like yours), can avoid the risk of water seepage.

 

 

 

How to Make the Decision for Yourself?

1. Considering your earlier mention of wanting to do it yourself, my suggestion leans towards dry grinding:
2. Safety First, Avoid Potential Hazards: If you are working in your own basement or garage (especially an upstairs apartment garage), dry grinding is strongly recommended. If the slurry from wet grinding isn't properly managed, leaks to the floor below can cause significant problems. Dry grinding, with a powerful vacuum cleaner, can control the dust.
3. Equipment Compatibility is Key: Choosing dry grinding means that the grinder you rent must be perfectly compatible with a high-powered industrial vacuum cleaner, and you must prepare a high-quality dust mask (N95 or P100 level).
4. Smooth Workflow: The dry grinding process is "grind an area -> thoroughly vacuum -> directly apply hardener," with no time to wait for the floor to dry, so you need to plan your work rhythm carefully.

 

In summary:

For your DIY project, dry grinding is the more mainstream and reliable option. It eliminates the hassle of dealing with mud and worrying about leaks, making the process more controllable. As long as dust removal is done properly, it's the most suitable method for a home environment.

 

 

Have you rented your grinder yet? If you've decided to use dry grinding, would you like me to check how to connect your vacuum cleaner to the machine to prevent dust leakage?