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Cracks can be occur in practically all concrete structures. Causes of these cracks include improper concrete mix, rapid concrete curing, improper expansion control joints, premature removal of concrete forms, compressible and expansive soil, premature backfilling, improper compaction of fill soil, expansive clay soils, uneven moisture around the structure, plumbing leaks, poor drainage, and hydrostatic water pressure.

Concrete pools can develop cracks due to downshifting of the earth below them, erosion of the concrete, and hot and cold weather effecting the temperature of the water.

Many underground concrete pools suffer from cracking, movement and lack of reinforcement. As water leaks out of cracks it also increases the hydrostatic pressure. Many pools must be repaired on an annual basis. Countersunk staples add strength to epoxy injections of cracks, while leaving flush surface for pool refinishing and tiling.

Fortress Countersunk Staples can often be installed in 1 day and will increase longevity of epoxy crack injections.

CARBON FIBER COUNTERSUNK STAPLES

Crack Repair Materials

One of the longest and ongoing debates in the concrete repair industry is which type of material should be used to repair cracks in concrete. The number of choices are numerous ranging from cementitious products, mortars with polymer base, methacrylate, epoxies, asphalt based, etc. Understanding the type of cracking and the cause of cracking is crucial in a successful repair of concrete. For instance: if a control joint is designed, you must honor the control joint as such. In this case you will likely choose a high elongation material. One common misconception is that all cracks are moving, so we should allow for that movement. This of course is only half right. All cracks do move because they are allowed to move, but not necessarily because they need to move for concrete to function as designed.

Whether you allow for a given movement or structurally bond, the biggest enemy is too much movement or movement that compounds and fatigues repair material. Hundreds of material companies now manufacture 1 and 2 component injection systems epoxy based, polyurethane grout, etc. Yet they all depend on a single plane and are subject to many different forces. The use of cross-stitching or stitching dogs has always made sense allowing the transference of load from crack and crack material. However it is still not widely used unless an engineer specified it in on large structural cracks. Repairing a crack in concrete and not reinforcing for tensile capacity is the same as pouring residential foundations without steel.The steel gives the foundation tensile that the concrete lacks.

The Fortress Carbon Fiber Countersunk Staples

There are many reasons a concrete pools will crack, some of the most common reasons are:
  • Soil pressure on the side walls
  • Thermal changes in soil and concrete
  • Settling from soil erosion / water leakage
  • Uneven loading of structure
  • Drying and shrinkage
  • Soil shrinkage in the dry season
Epoxies alone cannot guarantee that further movement is arrested. The crack may recur in the same area without further stabilization. Flexible repair materials must not exceed elongation.



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