03300A CAST-IN-PLACE STRUCTURAL CONCRETE][03301A CAST-IN-PLACE
STRUCTURAL CONCRETE FOR CIVIL WORKS][03307 CONCRETE FOR MINOR
STRUCTURES].
b. Mortar. Design the mortar mixtures to produce material having an
average compressive strength of [_____] kPa ([_____] psi) [_____] psi
at 28 days of age, determined in conformance with ASTM C 109/C 109M.
Design the mixtures to secure an air content by volume of [5][_____]
percent, plus or minus 1-1/2 percent, based on measurements made on
concrete at the point of placement in conformance with ASTM C 231. The
range of slump shall be 13 to 50 mm (1/2 to 2 inches) 1/2 to 2 inches
when tested in accordance with ASTM C 143/C 143M except that maximum
slump may be increased to 100 mm (4 inches) 4 inches when the
Contractor has included an approved water-reducing, high range,
admixture conforming to ASTM C 494/C 494M in the mix design. To
minimize drying shrinkage, the maximum water-cementitious materials
ratio by weight shall be 0.45 and the maximum cement content shall be
kept to a minimum to limit water volume. Make mix design studies and
tests in accordance with ASTM C 39/C 39M and ASTM C 192/C 192M, and
submit the test results for approval.
c. Grout. Design the grout mixtures to produce material having an
average compressive strength of [_____] kPa ([_____] psi) [_____] psi
at 28 days of age, determined in conformance with ASTM C 109/C 109M.
Design the mixtures to secure an air content by volume of [5][_____]
percent, plus or minus 1-1/2 percent, based on measurements made on
concrete at the point of placement in conformance with ASTM C 231. The
range of slump shall be 13 to 50 mm (1/2 to 2 inches) 1/2 to 2 inches
when tested in accordance with ASTM C 143/C 143M except that maximum
slump may be increased to 100 mm (4 inches) 4 inches when the
Contractor has included an approved water-reducing, high range,
admixture conforming to [ASTM C 494/C 494M][ASTM C 1017/C 1017M] in the
mix design. To minimize drying shrinkage, the maximum
water-cementitious materials ratio by weight shall be 0.45 and the
maximum cement content shall be kept to a minimum to limit water
volume. Make mix design studies and tests in accordance with ASTM C
39/C 39M and ASTM C 192/C 192M, and submit the test results for
approval.
[Provide the services of a technical specialist experienced in using the
polymer for repair materials.]
1.4.2
Repair Material Performance Requirements
Design repair materials to conform to the following requirements at 28 days
unless otherwise indicated:
Physical Properties of Cement-Based Repair materials
Property
Test method
Criteria
Tensile Strength (28 days)
COE CRD-C 164
2.8 MPa (minimum)
ASTM C 469
24 GPa (maximum)
Coefficient of Thermal
Expansion
COE CRD-C 39
12 millionths/degree C
(maximum)
SECTION 03931
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