shall be taken from each member or area of concrete in place that is
considered potentially deficient. The location of cores will be
determined by the Contracting Officer to least impair the performance
of the structure. Concrete in the area represented by the core testing
will be considered adequate if the average strength of the cores is
equal to at least 85 percent of the specified strength requirement and
if no single core is less than 75 percent of the specified strength
requirement.
c. Load Tests - If the core tests are inconclusive or impractical to
obtain or if structural analysis does not confirm the safety of the
structure, load tests may be directed by the Contracting Officer in
accordance with the requirements of ACI 318M/318RM ACI 318/318R.
Concrete work evaluated by structural analysis or by results of a load
test shall be corrected in a manner satisfactory to the Contacting
Officer. All investigations, testing, load tests, and correction of
deficiencies will be performed and approved by the Contracting Officer
at the expense of the Contractor, except that if all concrete is in
compliance with the plans and specifications, the cost of
investigations, testing, and load tests will be at the expense of the
Government.
1.5
DESIGN REQUIREMENTS
1.5.1
Concrete Strength
**************************************************************************
NOTE: Consult the Structural Design Engineer and
the appropriate DM to fill in the blanks.
**************************************************************************
Specified compressive strength f'c shall be as follows:
**************************************************************************
NOTE: The following compressive strengths are in
Metric.
**************************************************************************
COMPRESSIVE STRENGTH (MPa)
STRUCTURE OR PORTION OF STRUCTURE
[34.5
@
[_____]
days
[_____]]
[27.6
@
[_____]
days
[_____]]
[20.7
@
[_____]
days
[_____]]
[17.2
@
[_____]
days
[_____]]
[[____]
@
[_____]
days
[_____]]
**************************************************************************
NOTE: The following compressive strengths are in
English.
**************************************************************************
COMPRESSIVE STRENGTH (PSI)
STRUCTURE OR PORTION OF STRUCTURE
[5,000
@
[_____]
days
[_____]]
[4,000
@
[_____]
days
[_____]]
[3,000
@
[_____]
days
[_____]]
[2,500
@
[_____]
days
[_____]]
[[____]
@
[_____]
days
[_____]]
SECTION 03301A
Page 18
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