What is the SD Joint-Saver?
The SD Joint-Saver is a patented fix for loose and damaged joints in concrete slabs.
How does the SD Joint-Saver work?
When installed the SD Joint-Saver places pressure on opposing slab segments reducing independent movement during load transfer.
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Why is the SD Joint-Saver better than other joint repair methods?
The SD Joint-Saver offers a permanent fix to common joint problems with virtually no disruption to your operation during installation. The SD Joint-Saver installs quickly and is more cost-effective than most other repair methods.
How is the SD Joint-Saver installed?
The SD Joint-Saver is installed by coring a hole in the concrete slab at the joint location and replacing the core with the SD Joint-Saver which is then expanded to exert pressure to each side of the joint.
Does the SD Joint-Saver allow for slab movement due to temperature changes?
Yes, there is a patented spring-like mechanism built into the cylinder that allows it to expand and contract with the slab.
How far apart are SD Joint-Saver units placed?
Typically the SD Joint-Saver units are spaced approximately 4 feet apart on the joint, with 4 units installed at each joint intersection 1 foot from the intersection.
What is curling?
Curling is the distortion of a slab into a curved shape by upward bending of the edges. This is primarily due to differences in moisture and/or temperature in the top and bottom surfaces of a concrete slab. The distortion can lift the edges of the slab from the base, leaving an unsupported section. The slab section may rock when under load, causing edges to chip or spall.
What if there is a void underneath the slab?
The SD Joint-Saver will provide positive load transfer across the joint. If there is any movement, the panels will move together, not independently.
What about in extreme cases of thermal movement?
The SD Joint-Saver cylinders can be readjusted as needed.
Can the SD Joint-Saver be used on any slab thickness?
It is recommended that the SD Joint-Saver be used on slabs 6 to 10 inches thick. A different model is being tested for 4-inch and 5-inch thick slabs.
How are results verified?
A Dipstick Floor Profiler, Modified Benkelman Beam, or D-Meter is used to measure differential deflection before and after the SD Joint-Saver is installed and the data is recorded.
How long has the SD Joint-Saver been in use?
They have been used in slabs since 2004.
Does the entire floor need to be corrected at the same time?
No, although repairs to larger areas at a time may be more economical, the SD Joint-Saver gives owners the option to correct areas at their convenience, allowing them to spread the cost out over a period of time.
How much do they cost?
The cost will vary on different projects depending on slab thickness, hardness of concrete, accessibility, location, quantity of units installed, etc. Typically the SD Joint-Saver will be competitive with other solutions, especially when all of the short and long-term benefits are considered.
How does the SD Joint-Saver benefit a facility owner?
The SD Joint-Saver stabilizes the floor joints and creates a positive load transfer with much less joint deflection and further deterioration resulting in a smoother ride and increased efficiency. Owners have the potential to experience much less material handling equipment damage, less product damage, lowered injury risk, and increased productivity.
Can the SD Joint-Saver replace subslab grout injection?
Yes, in many cases. Subslab grout injection stabilizes joints by supporting the slab edges from underneath. The SD Joint-Saver stabilizes joints by tying the slab edges together across the joint. While both methods have been used with success, only the SD Joint-Saver keeps working if slabs curl or the sub-base sinks.