Officer supervision. The Government will test such samples at its expense
using appropriate COE CRD-C and ASTM methods.
1.3.2.3
Cementitious Materials
Cement or pozzolan or both shall be furnished from a prequalified source
or, if not, it (they) will be sampled at the mill, shipping point, or site
of the work by the Contracting Office. A list of prequalified cement
sources and prequalified pozzolan sources is available from the Director,
U.S. Army Corps of Engineers, Engineer Research and Development Center -
Structures Laboratory, 3909 Halls Ferry Road, Vicksburg, MS 39180-6199,
ATTN: CEERD-SC. If tests prove that a material which has been delivered
is unsatisfactory, it shall be promptly removed from the site of the work.
Cementitious materials that have not been used within 6 months after being
tested will be retested by the Government at the expense of the Contractor
when directed.
1.3.2.4
Cement from Prequalified Sources
Cement shall be delivered and used directly from a mill of a producer
designated as a prequalified source for the type of cement being used.
Samples of cement for quality-assurance testing will be taken at the
project site or cement-producing plant by the Contracting Officer for
testing at the expense of the Government. A copy of the mill tests from
the cement manufacturer shall be furnished to the Contracting Officer for
each lot.
1.3.2.5
Pozzolan from Prequalified Sources
Pozzolan shall be delivered and used directly from a producer designated as
a prequalified source. Samples of pozzolan for check testing will be taken
at the project site by the Contracting Officer for testing at the expense
of the Government. A copy of the test results from the pozzolan
manufacturer shall be furnished to the Contracting Officer for each lot.
1.3.2.6
Cement from Nonprequalified Sources
**************************************************************************
NOTE: The Contractor's expense rate for excess
testing of cement and pozzolan by the Government can
be obtained from the Structures Laboratory, U.S.
Army Engineer Waterways Experiment Station
(CEWES-SC-MP), 3909 Halls Ferry Road, Vicksburg, MS
39180-6199.
**************************************************************************
Cement, if not from a prequalified source, will be sampled and tested by or
under the supervision of the Contracting Officer and at Government expense.
No cement shall be used until notice has been given by the Contracting
Officer that test results are satisfactory. In the event of failure, the
cement may be resampled and tested at the request of the Contractor and at
the Contractor's expense. When the point of sampling is other than at the
site of the work, the fill gate or gates of the sampled bin will be sealed
and kept sealed until shipment from the bin has been completed. The fill
gate or gates of conveyances used in shipment will be sealed by or under
the supervision of the Contracting Officer. Conveyances will not be
accepted at the site of the work unless received with all seals intact. If
tested cement is rehandled at transfer points, the extra cost of inspection
will be at the Contractor's expense. The cost of testing cement excess to
SECTION 03700
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