how to repair cracked concrete floor
Cracks are one of the most common problems in concrete floor, If a crack is not properly repaired, the situation will get much worse, causing spalling and disintegration of the concrete.so, It is very important to repair cracked concrete floor.
Here is an idea of what you'll need to repair cracked concrete floor.
Cutting machine, High pressure blower gun, High pressure water gun, Pneumatic pick,Air compressor,
Sponge or mop, Vertical mixer, Channel steel(darby), steel trowel, water storage barrel, clean water.
Construction process of repair cracked concrete floor:
Joint-cutting→Chiseling→Cleaning→Wet mixing→Repairing→Curing→
Cut expansion joint→Open the traffic
Matters need attention when repair cracked concrete floor:
1.All dust in chiseled rectangular groove must be removed cleanly, basis and all around must fully wet.
2.Dry mix SC repair material with 50% grave, add 13-14% clean water to mix 3-5 mins, until even.
about gravel suggest diameter<30mm continuous gradation, it is best to use washed gravel.
3.Operation time usually is 20 mins, hardened mortar can't be reused.
4.It can't construct when rainy day or temperature below zero.
The advantages of SC concrete repair product repair cracked concrete floor:
1)Rapid repair, 1 hour open to traffic
2)Good adhesion
3)High toughness & impact resistance strength
4)Beautiful, uniform color
5)Used as first-aid repair product in damp environment
Testing data of 28days that SC repair material repair cracked concrete floor:
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 |
Cost-benefit analysis of SC repair material repair cracked concrete floor:
1)Perfectly filling cracks,water difficultly to enter.If repaired by other ways,
it still is broken slab,weak strength caused water easy enter into.
2)Nice color,color is same as original concrete floor.
3)No dry shrinkage cracks in new and old adhesion area.
4)High adhesion strength,original concrete slab won't be broken.
5)Extend concrete floor pavement service life.
Use our SC concrete repair material repair cracked concrete floor, you won't be disappointed.
