how to patch concrete cracks in garage floor
As for concrete cracks on garage floor, How to patch them?
Above concrete garage floor is badly cracked and in desperate need of repair.
Step 1:Joint-cutting
Along crack each side 5-8cm,saw 2 cutting seam(depth 10cm), width between two cutting seam is 10-15cm.
Step 2: Chiseling
Avoid edge failure when chisel by pneumatic pick, chiseling depth 8-10cm.
Step 3:Cleaning
Remove dirt in chiseled groove by hair brush, then clean by high pressure water gun.
Step 4: Mixing SC concrete repair material with water
Firstly dry mix repair material and 60% clean gravel(diameter<30mm continuous gradation, best to use washed gravel), then add 13-14% clean water to mix 3-5 minutes,Until even.
Step 5:Repairing
Use trowel to force the mixture deep into the cracks,Then smooth out the surface.
Step 6:Open to traffic
After repairing finished 1 hour,restore the traffic.
What is the effect?
1.Fast setting,1 hour restore the traffic,reduce traffic jams.
2.Beautiful,uniform color,joint tightly after repair,no dry shrinkage cracks
3.High adhesion strength,compressive & flexural strength is 2 times of normal concrete.
4.Good toughness,Impact resistance strength is more than 5 times of normal concrete.
5.Waterproof anti-freeze,heat expansion & cold contraction is nearly same as grass-roots concrete.
Technical data of SC type concrete repair material:
Test items | Unit | Technical requirement | Test result | Individual conclusion | |
Setting time | Initial setting | Min | ≥20 | 25 | Meet requirement |
Final setting | ≤60 | 35 | |||
Compressive strength | 4h | Mpa | ≥20 | 33.0 | Meet requirement |
1d | ≥40 | 66.1 | |||
28d | ≥50 | 90.5 | |||
Pull strength | 28d | Mpa | ≥2.0 | 2.8 | Meet requirement |
Expansion rate | 28d | / | 0.00%-0.1% | 0.01% | Meet requirement |
