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Subject: Correct procedures Apr Irnar gpairofgunnte-o-r- liofcrEta ing PLOIT.----
Removal work varying from i7 ji�a- e
swimming pools. Removals &-repla®e,
long as the following procedures are f I
to the existing swimming pool structure.
in existing
;ceptable as
dr materials
I. Existing surfaces must be sound, free of defects, clean and free of bond inhibiting materials.
2. Existing surfaces must be roughened by chipping or other suitable means to provide an open pore
structure. All loose, cracked or deteriorated materials must be removed.
3. Clean existing surfaces by water blasting.
5. Saturated surface dry condition of the substrate shall be maintained to prevent premature drying of
the bonding paste.
6. Any reinforcement exposed in the repair or remodeling must be completely exposed with a
minimum of 1 inch clear completely around the reinforcement to permit proper encasement of the
reinforcement in the repair material.
7. Where it is impractical to use pneumatically applied material for the repair, dry pack mortar (low
water content) may be used for small repairs to minimize the potential for shrinkage cracking.
Pre -packaged products such as Rapid -Set Mortar Mix (for thinner repairs) or Rapid -Set Concrete
Mix (for thicker repairs) are low shrinkage, ,fast setting products formulated for repair applications
and are ideal for minor repairs in swimming pool. When using pre -packaged products, it is critical
that the manufacturers use limitations, mixing and placing instructions be explicitly followed.
8. When using Dry Pack Mortar or equivalent, the material should be applied over cement paste or
another approved bonding agent, which has been brushed onto the substrate (existing material) for
absorption into the pore structure. The new material shall be applied before the cement paste or
other approved bonding agent "skins over" or starts its "setting stage". Bonding aids are generally
not required when pneumatically applied materials are utilized in the repair.
9. Do not use a bonding agent with dry mix shoterete (gunite) or wet mix shoterete.
Hopefully, this clarifies the procedures for minor repair in gunite construction. If you require any
additional information or if I can be of any further assistance, please call me at (714) 630-6100.
L.
No. 67656
Exp. 6-30-13
1201 N. Tustin Avenue Anaheim, California 92807 Fax: (714) 630-6114 Phone: (714) 630-6100