Physical Properties of Cement-Based Repair materials
Property
Test method
Criteria
Drying Shrinkage
ASTM C 157/C 157M
(28 days)
(modified)
400 millionths (maximum)
(1 year)
1,000 millionths (maximum)
Restrained Shrinkage
AASHTO PP34
No cracks within 14 days,
Implied strain at 1 year
1,000 millionths (maximum)
Physical Properties of Cement-Based Repair Materials
Property
Test method
Criteria
Tensile Strength (28 days)
COE CRD-C 164
400 psi (minimum)
ASTM C 469
3,500,000 psi
(maximum)
Coefficient of Thermal
Expansion
COE CRD-C 39
6.7 millionths/degree F
(maximum)
Drying Shrinkage
ASTM C 157/C 157M
(28 days)
(modified)
400 millionths (maximum)
(1 year)
1,000 millionths (maximum)
Restrained Shrinkage
AASHTO PP34
No cracks within 14 days,
Implied strain at 1 year
1,000 millionths
(maximum)
Notes on Table:
a. ASTM C 157/C 157M (modified). The modifications to the test method
for this requirement are as follows:
(1) Standard specimen size is 76x76x275 mm (3x3x11-1/4 inch)
3x3x11-1/4 inch for concrete mortar expanded with aggregate and
mortar.
(2) Remove sample from mold at 23 plus or minus 1/2 hours and
make initial comparator reading immediately. (For rapid hardening
materials, remove sample from mold at 3 hours and make initial
comparator reading.)
(3) The specimens are then stored under the standard conditions
at 23.0 + 2 degree C (73 + 3 degrees F)73.4 plus or minus 3
degrees F and 50 plus or minus 4% RH.
Subsequent comparator readings are to be taken at ages of 3 days, 7
days, 14 days, 1 month, 2 months; measurements shall continue until 90%
of ultimate drying shrinkage is reached. Ultimate shrinkage is to be
determined as described in ASTM C 596.
1.5
SUBMITTALS
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NOTE: Submittals must be limited to those necessary
for adequate quality control. The importance of an
SECTION 03931
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