from sources listed at the end of this section.
b. Selection of Source - After the award of the contract, the
Contractor shall designate in writing only one source or combination of
sources from which he proposes to furnish aggregates. If the
Contractor proposes to furnish aggregates from a source or from sources
not listed at the end of this section, he may designate only a single
source or single combination of sources for aggregates. Regardless of
the source, selected samples for acceptance testing shall be provided
as required by paragraph GOVERNMENT TESTING AND STUDIES. If a source
for coarse or fine aggregates so designated by the Contractor does not
meet the quality requirements stated in paragraph QUALITY, the
Contractor may not submit for approval other nonlisted sources but
shall furnish the coarse or fine aggregate, as the case may be, from
sources listed at the end of this section at no additional cost to the
Government.
2.1.2.6
Coarse-Aggregate Quality
**************************************************************************
NOTES: The tests selected should be those which are
applicable to the concrete to be used in the
project. These tests may include those listed below
in addition to others not listed. See Chapter 2 of
EM 1110-2-2000 for discussion of tests.
A list of properties and test values are unique to
each project and should be taken from the concrete
materials design memorandum. Delete the quality
tests not required in the DM.
The petrographic examination shall be used to
identify deleterious substances in aggregates.
Deleterious substances shall be listed individually
with respective limits.
Depending upon the quality of aggregates available,
some tests may not be required. Refer to EM
1110-2-2000 for the purpose of each test.
**************************************************************************
Aggregates delivered to the mixer shall meet the following requirements:
TEST LIMITS
PROPERTY
FINE AGGREGATE
COARSE AGGREGATE
TESTS
Specific Gravity
[_____]
[_____]
ASTM C 127
ASTM C 128
Absorption
[_____]
[_____]
ASTM C 127
ASTM C 128
[Durability Factor
[_____]
[_____]
COE CRD-C 114
ASTM C 666/C 666M]
[Clay Lump and
[_____]
[_____]
ASTM C 142]
Friable Particles
SECTION 03372
Page 17
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