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 or portland cement in
combination with pozzolan [or [_____]] and shall conform to appropriate
specifications listed below.
2.1.1.1
Portland Cement
ASTM C 150, Type I or II, except that the maximum amount of tricalcium
aluminate (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 slag provided the following requirement is met. The expansion
of the proposed combination when tested in accordance with ASTM C 441shall
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.]
2.1.1.2
Pozzolan
Pozzolan shall conform to ASTM C 618, Class [C], [F], [N], 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.
2.1.1.3
[Ground Granulated Blast-Furnace Slag
Ground Granulated Blast-Furnace Slag shall conform to ASTM C 989, Grade
[_____].]
2.1.2
Aggregates
2.1.2.1
General
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NOTE: The list of sources and required tests and
test limits will be taken from the concrete
materials DM.
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Concrete aggregates may be furnished from any source capable of meeting the
quality requirements as stated in paragraph QUALITY. The sources listed at
the end of this section were evaluated during the design phase of the
project in [_____] and were found at that time capable of meeting the
quality requirements when suitably processed. No guarantee is given or
implied that any of the listed sources are currently capable of producing
aggregates that meet the required quality stated in paragraph QUALITY. A
Design Memorandum containing the results of the Government investigation
and test results is available for review in the [_____] district office.
SECTION 03372
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