3.1.1
Coating
Before concrete placement, coat the contact surfaces of forms with a
nonstaining mineral oil, nonstaining form coating compound, or two coats of
nitrocellulose lacquer. Do not use mineral oil on forms for surfaces to
which adhesive, paint, or other finish material is to be applied.
3.1.2
Removal of Forms and Supports
After placing concrete, forms shall remain in place for the time periods
specified in ACI 347R, except for concrete placed underwater, forms shall
remain in place 48 hours. Prevent concrete damage during form removal.
3.1.2.1
Special Requirements for Reduced Time Period
Forms may be removed earlier than specified if ASTM C 39 test results of
field-cured samples from a representative portion of the structure or other
approved and calibrated non-destructive testing techniques show that the
concrete has reached a minimum of 85 percent of the design strength.
3.1.3
Reshoring
Do not allow construction loads to exceed the superimposed load which the
structural member, with necessary supplemental support, is capable of
carrying safely and without damage. Reshore concrete elements where forms
are removed prior to the specified time period. Do not permit elements to
deflect or accept loads during form stripping or reshoring. Forms on
columns, walls, or other load-bearing members may be stripped after 2 days
if loads are not applied to the members. After forms are removed, slabs
and beams over 3 meters 10 feet in span and cantilevers over 1.2 meters 4
feet shall be reshored for the remainder of the specified time period in
accordance wit paragraph entitled "Removal of Forms." Perform reshoring
operations to prevent subjecting concrete members to overloads, eccentric
loading, or reverse bending. Reshoring elements shall have the same
load-carry capabilities as original shoring and shall be spaced similar to
original shoring. Firmly secure and brace reshoring elements to provide
solid bearing and support.
3.2
PLACING REINFORCEMENT AND MISCELLANEOUS MATERIALS
ACI 301. Remove rust, scale, oil, grease, clay, or foreign substances from
reinforcing that would reduce the epoxy coating bond from reinforcing. Do
not tack weld. Inspect placed steel reinforcing for coating damage prior
to placing concrete. Repair all visible damage.
3.2.1
Epoxy Coated Reinforcing
Shall meet the requirements of ASTM A 934/A 934M including Appendix X2,
"Guidelines for Job Site Practices" except as otherwise specified herein.
3.2.1.1
Epoxy Coated Reinforcing Steel Delivery, Handling, and Storage
Record coating lot on each shipping notice and carefully identify and retag
bar bundles from bending plant. Provide systems for handling coated bars
which have padded contact areas, nylon slings, etc., all free of dirt and
grit. Lift bundled coated bars with strong back, multiple supports, or
platform bridge to prevent sagging and abrasion. Bundling bands shall be
padded where in contact with bars. Do not drop or drag bars or bundles.
Store coated bars both in shop and in field, aboveground, on wooden or
SECTION 03311
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