field-cured samples from a representative portion of the structure indicate
that the concrete has reached a minimum of 85 percent of the design
strength.
3.1.3
Reshoring
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 3000 mm (10 feet)
10 feet in span and cantilevers over 1200 mm (4 feet) 4 feet shall be
reshored for the remainder of the specified time period in accordance with
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-carrying
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
Waterstop Splices
Fusion weld in the field.
3.3
Formed Surfaces
3.3.1
Tolerances
ACI 347R and as indicated.
3.3.2
As-Cast Form
Provide form facing material producing a smooth, hard, uniform texture on
the concrete. Arrange facing material in an orderly and symmetrical manner
and keep seams to a practical minimum. Support forms as necessary to meet
required tolerances. Material with raised grain, torn surfaces, worn
edges, patches, dents, or other defects which will impair the texture of
the concrete surface shall not be used.
3.4
PLACING REINFORCEMENT AND MISCELLANEOUS MATERIALS
ACI 301. Provide bars, wire fabric, wire ties, supports, and other devices
necessary to install and secure reinforcement. Reinforcement shall not
have rust, scale, oil, grease, clay, or foreign substances that would
reduce the bond. Rusting of reinforcement is a basis of rejection if the
effective cross-sectional area or the nominal weight per unit length has
been reduced. Remove loose rust prior to placing steel. Tack welding is
prohibited.
3.4.1
Vapor Barrier
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NOTE: Include taping of joints when waterproof
paper is specified.
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Provide beneath the on-grade concrete floor slab. Use the greatest widths
and lengths practicable to eliminate joints wherever possible. Lap joints
a minimum of 300 mm (12 inch) 12 inches [and tape or cement joints].
SECTION 03300N
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