1.7
SAMPLING AND TESTING
1.7.1
Aggregate Sampling
Times and points of sampling will be designated by the Contracting Officer.
Samples of aggregates, including mineral filler, shall be furnished by the
Contractor at no cost to the Government. Samples will be the basis for
approval of specific sources or stockpiles of aggregates for aggregate
requirements. Unless otherwise directed, ASTM D 75 shall be used in
sampling coarse and fine aggregate, and ASTM C 183 shall be used in
sampling mineral filler. Grade mineral filler in accordance with the
limits set forth in ASTM D 242.
1.7.1.1
General Requirements
Initial prequalification testing of aggregates necessary to determine
compliance with the requirements specified herein will be made by the
Contracting Officer. Additional testing and inspection during construction
shall be the responsibility of the Contractor under CONTRACTOR QUALITY
CONTROL (CQC).
1.7.1.2
Sources
**************************************************************************
NOTE: Satisfactory service record for an aggregate
will be determined based on the aggregate's ability
to resist polishing, raveling, stripping, and
degradation under traffic and climatic conditions
similar to those expected during its use. If
performance data indicate that an aggregate is
susceptible to one or more of the above-mentioned
problems, that source of aggregate shall be
rejected. The prequalification testing of aggregate
from a proven source requires 20 days. Testing of
new sources of aggregates requires 30 days. This is
actual testing time. Two weeks should be added to
cover the submittal process.
**************************************************************************
Sources of aggregates shall be selected well in advance of the time the
materials are required in the work. If a previously developed source is
selected, samples shall be submitted [_____] days before starting
production, with evidence that central-plant, hot-mix bituminous pavements
or porous friction courses constructed with the aggregates have had a
satisfactory service record of at least five years under similar climatic
and traffic conditions. When new sources are developed, the Contractor
shall indicate sources and submit samples and his plan for operation
[_____] days before starting production. The Contracting Officer will make
such tests and other investigations as necessary to determine whether
aggregates meeting the requirements specified herein can be produced from
proposed sources. If a sample of material from any source fails to meet
specification requirements, the material represented by the sample shall be
replaced, and the cost of testing the replaced sample shall be at the
Contractor's expense. Approval of source of aggregate does not relieve the
Contractor of the responsibility to deliver at the jobsite aggregates that
meet the specified requirements.
SECTION 02747
Page 9
Previous Page
