substitute source for any size aggregate after the original source was
tested, the cost of that additional testing will be borne by the
Contractor. Tests to which aggregate may be subjected are listed in
paragraph QUALITY. The material from the proposed source shall meet the
quality requirements of this paragraph. The Government's test data and
other information on aggregate quality of those sources listed at the end
of this section are included in the Design Memorandum and are available for
review in the district office. Quality Assurance testing of aggregates by
the Government does not relieve the Contractor of quality control
requirements as outlined in paragraph TESTING AND QUALITY VERIFICATION FOR
CONTRACTOR QUALITY CONTROL.
1.4.1.2
Cementitious Materials, Admixtures, and Curing Compound
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NOTE: When the optional sentence below is deleted,
the corresponding manufacturer's certification
described in the paragraph SUBMITTALS should be
used. EM 1110-2-2000, "Standard Practice for
Concrete", provides guidance in selecting the
options for Government or for Contractor testing.
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At least 60 days in advance of concrete placement, the Contractor shall
notify the Contracting Officer of the source of materials, along with
sampling location, brand name, type, and quantity to be used in the
manufacture and/or curing of the concrete. [Sampling and testing will be
performed by and at the expense of the Government except as otherwise
specified. No material shall be used until notice has been given by the
Contracting Officer that test results are satisfactory. The Government
will sample and test other chemical admixtures, curing compounds, and
cementitious materials].
a. Chemical Admixtures - Chemical admixtures that have been in storage
at the project site for longer than 6 months or that have been
subjected to freezing shall be retested at the expense of the
Contractor when directed by the Contracting Officer and shall be
rejected if test results are not satisfactory. Chemical admixtures
will be accepted based on compliance with the requirements in paragraph
CHEMICAL ADMIXTURES.
[b. Cement and Pozzolan - If cement or pozzolan is to be obtained from
more than one source, the initial notification shall state the
estimated amount to be obtained from each source and the proposed
schedule of shipments.]
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NOTE: Delete this paragraph if materials are to be
accepted on the basis of a manufacturer's
certification of compliance and mill test reports,
and the optional submittals under SD-07 Certificates
in paragraph SUBMITTALS will be used. See the
appropriate DM or consult the Materials Engineer to
select prequalified sources, (1) and (2), sealed
bins, (3) and (4), or both options, (1), (2), (3),
and (4). Selection of the sealed bin method,
subparagraphs (3) and (4), must be fully justified
in the appropriate DM.
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SECTION 03372
Page 12
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