AGGREGATES.
2.1.2
Blended Cements
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NOTE: Blended cement is not used by the Navy.
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Blended cement shall conform to ASTM C 595, Type [IP] [IP (MS)] [IS] [IS
(MS)], including the optional requirement for mortar expansion.Not Used.
2.1.3
Pozzolan
2.1.3.1
Fly Ash
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NOTE: For Navy projects, Class F fly ash is
required in all paving concrete. For Army and Air
Force projects, Class F fly ash is permitted, but
not mandatory. Class C fly ash is not permitted for
paving concrete. Use loss on ignition not exceeding
3 percent for frost areas to reduce carbon
interference with air entraining admixture.
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Fly ash shall conform to ASTM C 618, Class F, including the optional
requirements for drying shrinkage, uniformity, and effectiveness in
controlling Alkali-Silica reaction and shall have a loss on ignition not
exceeding [3] [6] percent. Class F fly ash shall have a Calcium Oxide
(CaO) content of less than 8 percent.
2.1.3.2
Raw or Calcined Natural Pozzolan
Natural pozzolan shall be raw or calcined and conform to ASTM C 618, Class
N, including the optional requirements for drying shrinkage, uniformity,
and effectiveness in controlling Alkali-Silica reaction and shall have a
loss on ignition not exceeding [3] [6] percent. Class N pozzolan shall
have a Calcium Oxide (CaO) content of less than 5 percent.
2.1.4
Ground Granulated Blast-Furnace (GGBF) Slag
Ground Granulated Blast-Furnace Slag shall conform to ASTM C 989, Grade 100
or Grade 120.
2.2
AGGREGATES
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NOTE: The designer will ensure that aggregates
available in the area meet the requirements of these
specifications. Otherwise, the specification
requirements must be modified to allow use of
available material. This concern must be discussed
and validated in the Design Analysis before
preparation of the project specifications. During
the design stage, the designer must assure that all
aggregate materials in the area which meet the
project specifications will also produce concrete of
the specified flexural strength with a reasonable
cementitious material content. Otherwise,
SECTION 02753
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