Where facilities for precasting are available, precast construction offers the possibility of economies through reduction of forming and labor. When joints are properly designed and constructed, this type can perform as well structurally as can cast-in-place structures
pool can be squared using the Swim-crete pool prints. The pool then should be leveled using a laser or transit. The highest point of the pool is established. Start at the opposite end of the pool, use shims to level toward the high point until the pool is level. Swim-crete parapet bracket.
Note: Minimal or no interior bracing required to suspend interior concrete forms.Swim-crete system is ready for concrete placement. 3" (8 cm) slump recommended for all monolithic pool pours.
Concrete is placed into the concrete forms at a 3" slump starting in the deep end walls. Once deep end walls are filled with concrete, the walls are vibrated; this allows concrete to flow under interior forms.
Concrete placement continues in the deep end of the pool, stacking concrete until both wall and floor come together.
Finishing of concrete floors begins while the placement of walls continues.
Once concrete is cured to minimal strength, remove the forms, break the tie ends, leaving the pool ready to be plastered, tiled, epoxy painted or utilizing other finishing methods.
- In 1959 cast-in-place concrete (pour concrete) accounted for 23 percent of all the pools built (up from 11 percent in 1957)
- In 1957 pneumatically applied concrete (shotcrete) accounted for 72 percent of all the pools built
- In 1959 pneumatically applied concrete (shotcrete) method of application accounted for only 54 percent
- In the same year vinyl or nylon liner accounted for 15 percent
- In the same year fiberglass, steel, aluminum and other materials for 8 percent
- Precast or cast-in-place application methods represent about 40 percent of the pools constructed with concrete.
- Forms for pools should be set for casting walls at least 8 inches thick
- Cast-in-place construction is generally chosen where embankment shifting or external pressures due to other causes are possible.
- Cast-in-place walls are designed as flexural members with the steel stresses higher than 12,000 to 15,000 psi.
- Generally cast-in-place is more expansive option over shotcrete.