NYC 9/11 Public Portal Document
B. Concrete Aggregates
1. Fine aggregate for concrete shall comply with the
requirements of ASTM Specification C-33, Current
Edition. It shall consist or clean, hard, strong, dur
able uncoated particles of mineral origin, free from
salt, locim, shale, clay and other deleterious matter
and shall be weJi graded from coarse to fine.
2. Coarse aggregate shall comply with the requirements
of ASTM Specificatiox) C-33, Current Edition. It shall
consist of crushed sound stone, composed of hard, strong,
durable uncoated pieces free from soft, friable, thin,
■ elongated or laminated fragments or a screened and
washed bank run gravel.
C. Cement
1. Cement for all concrete shai.l be Portland Cement,
Type II, of United States manufacture and of an approved
brand complying with the requirements of ASTM Speci
fication C-150, Current Edition.
D. Water
1. Water used in concrete shall be potable water.
E. Admixtures
1. Water reducing and retarding admixtures shall be
approved by the Contractor and shall meet the require
ments of ASTM Specification C-494
F. Reinforcement
1. Bar reinforcement shall be new deformed billet steel
bars. Grade 6 0 of United States manufacture conforming to the
requirements of' ASIM Specification Afil5, Current Edition.
G* ConcreteDesj^n
1. Concrete shall be composed of materials meeting the
requirements of this Section, proportioned so as to pro
vide the minimum specified compressive strength for that
portion of the Work.
BPC-COMMERCIAL CENTER 03315-2
FOUNDATION CONCRETE
WORLD TR/'DE CENTER REIOCATION
NYC-WTC_000165135
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