Sto Restoration Systems Solution Concrete Beam or Joist Spalls: Severe

shootperchUrban and Civil

Nov 26, 2013 (3 years and 11 months ago)

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R
Always consult a design professional to
diagnose conditions, specify repairs and
determine the possible need for shoring or
supplemental reinforcement.
Sto details are illustrations of construction.
They are guidelines, intended for use by
the design/construction professional, to
assist in developing project
specific details. They should be modified
where necessary to accommodate individual
project conditions. For Sto material selection,
physical properties,
mixing, application and curing information
refer to appropriate Sto Technical Bulletins.
Refer to project specifications and local
building code for any special
requirements.
www.stocorp.com
Sto Restoration Systems Solution
Concrete Beam or Joist Spalls: Severe
Detail No.:R1.2.3
Date: March 2001
Notes:
1] Severe spalls are
deeper than 1/4Ò (7mm)
with aggregate loss,
and exposed re-bar.
2] Pressure wash after
excavation to remove
dust, laitance, and
other bond inhibiting
materials, SSD
substrate.
3] Apply two 10 mil
coats (total 20 mils) of
CR246 Sto Bonding
and Anti-Corrosion
Agent onto the
prepared steel and
one 20 mil coat to
SSD concrete surface
to insure protection of
steel and proper bond
of repair material.
4] Fill excavation with
appropriate Sto
Repair Mortar,
consolidate, finish
and cure as required.
5] Apply protective
coating to prepared
substrate followings.
6] For Sto material
selection, physical
properties, mixing,
application and curing
information refer to
appropriate Sto
Technical Bulletins

Existing Condition
Severe spall
(see note 1)
Step 1
Saw cut around
perimeter of spall
Chip to sound concrete
(see note 2)
Step 2
Coat exposed surfaces
with CR246 Sto
Bonding and
Anti-Corrosion Agent
Step 3
Fill prepared area with
Sto Repair Mortar
(see note 4)
Step 4
Protect surface with
appropriate coating