PART 2
PRODUCTS
2.1
MATERIALS
2.1.1
Cementitious Materials
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NOTE: See the appropriate DM to select the proper
requirements for the Cementitious Materials Options.
Other cementitious materials may be added if
specifically recommended and approved in the
concrete materials DM.
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Cementitious materials shall be portland cement, portland-pozzolan cement,
portland blast-furnace slag cement, portland cement in combination with
pozzolan or GGBF slag [or [_____]] [or portland cement in combination with
silica fume] and shall conform to appropriate specifications listed below.
Use of cementitious materials in architectural concrete shall be restricted
to one color, one source, and one type.
2.1.1.1
Portland Cement
ASTM C 150, Type I or II, except that the maximum amount of C3A in Type I
cement shall be 15 percent [including the heat of hydration at 7 days]
[including false set requirements] [low alkali when used with aggregates
listed at the end of this section which require it.] [In lieu of
low-alkali cement, the Contractor may use a combination of portland cement
that does not meet the low-alkali requirement with a pozzolan or GGBF slag
provided the following requirement is met. The expansion of the proposed
combination when tested in accordance with ASTM C 441 shall be equal to or
less than the expansion of a low-alkali cement meeting the requirements of
ASTM C 150 when tested in general conformance with ASTM C 441. The
expansion tests shall be run concurrently at an independent laboratory that
is nationally recognized to perform such tests. The Government reserves
the right to confirm the test results and to adjust the percentage of
pozzolan or slag in the combination to suit other requirements.] [white
portland cement shall meet the above requirements except that it may be
Type I, Type II, or Type III [low alkali]. White Type III may be used only
in specific areas of the structure, when approved in writing by the
Contracting Officer.]
2.1.1.2
High-Early-Strength Portland Cement
ASTM C 150, Type III, [with C3A limited to [5][8] percent][low alkali when
used with aggregates listed at the end of this section which require
it][used only when specifically approved in writing].
2.1.1.3
Pozzolan, Other than Silica Fume
Pozzolan shall conform to ASTM C 618, Class [C] [F], with the optional
requirements for multiple factor, drying shrinkage, and uniformity of Table
2A. Table 1A requirement for maximum alkalies shall apply when used with
aggregates listed at the end of this section to require low-alkali cement.
2.1.1.4
[Ground Granulated Blast-Furnace Slag
Ground Granulated Blast-Furnace Slag shall conform to ASTM C 989, Grade
[_____].]
SECTION 03301A
Page 21
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