COMPARISON of disruption caused by the top 3 walkway repair methods.
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The biggest difference in disruption is between removal and replacement of concrete and the two repair methods. The total project for breaking up the concrete, preparing the site, pouring and waiting for it to dry will take days or weeks in which the area cannot be used or crossed.
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Grinding and slicing are similar in that they allow immediate use of the area after repair, but grinding creates more dust and takes 50% to 300% longer to complete depending upon the height of the hazards that must be ground down.
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Grinding |
Slicing |
Remove & Replace |
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Environmental impact |
Lots of dust |
Minimal dust |
Dust & Landfill |
Noise pollution |
Moderate |
Moderate |
Very Loud |
Downtime on walkways |
None |
None |
Days or Weeks |
1/4"-1/2" vertical hazards |
YES |
YES |
YES |
1/2"-1" vertical hazards |
No |
YES |
YES |
1"-3" vertical hazards |
No |
YES |
YES |
Horizontal hazards |
No |
YES |
YES |
Chip or Hole hazards |
No |
YES |
YES |
Hazards that must be replaced |
No |
No |
YES |
Time to repair |
30-60 min per grind |
20 min per slice |
Days or weeks |
Meets ADA requirements? |
No |
YES |
YES |
City permit required? |
None |
None |
Yes, Expensive |
Resulting finish |
Rough |
Smooth |
Smooth |
Walkway Repair Costs |
Cheap |
Moderate |
Very Expensive |
