3.1.5
Embedded Items
Before placement of concrete, care shall be taken to determine that all
embedded items are firmly and securely fastened in place as indicated on
the drawings, or required. Conduit and other embedded items shall be clean
and free of oil and other foreign matter such as loose coatings or rust,
paint, and scale. The embedding of wood in concrete will be permitted only
when specifically authorized or directed. Voids in sleeves, inserts, and
anchor slots shall be filled temporarily with readily removable materials
to prevent the entry of concrete into voids. Welding shall not be
performed on embedded metals within 300 mm 12 inches of the surface of the
concrete. Tack welding shall not be performed on or to embedded items.
3.2
CONCRETE PRODUCTION
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NOTE: Use this paragraph and its subparagraphs for
all projects except where designer chooses to use
the following optional paragraph CONCRETE
PRODUCTION, SMALL PROJECTS, provided it meets the
criteria described therein, in which case delete
these. Do not specify both options.
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3.2.1
General Requirements
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NOTE: The designer must choose one of the two
bracketed requirements and delete the other. Do not
use the first bracketed requirement if ready-mixed
concrete is not wanted.
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[Concrete shall either be batched and mixed onsite or shall be furnished
from a ready-mixed concrete plant. Ready-mixed concrete shall be batched,
mixed, and transported in accordance with ASTM C 94/C 94M, except as
otherwise specified. Truck mixers, agitators, and nonagitating
transporting units shall comply with NRMCA TMMB 100. Ready-mix plant
equipment and facilities shall be certified in accordance with NRMCA QC 3.
Approved batch tickets shall be furnished for each load of ready-mixed
concrete. Site-mixed concrete shall conform to the following
subparagraphs.] [Concrete shall be batched and mixed onsite, or close to
onsite, and shall conform to the following subparagraphs.]
3.2.2
Batching Plant
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NOTE: Choose the desired bracketed options for
plant locations. Insert desired minimum capacity of
plant, it should be sufficient to accommodate the
largest placement within a reasonable time.
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The batching plant shall be located [on site in the general area indicated
on the drawings] [or] [off site close to the project]. The batching,
mixing and placing system shall have a capacity of at least [_____] cubic
meters cubic yards per hour. The batching plant shall conform to the
requirements of NRMCA CPMB 100 and as specified; however, rating plates
attached to batch plant equipment are not required.
SECTION 03300A
Page 35
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