SHRP-A-379 traducir

5. CALCULATIONS
A_er the specime_ fails, perform
the following calculations.
5.1 Calculate the fracture strength to the nearest 5 kPa as follows:
Fracture
Stress = Pu:t/A
wlaere
Pu_t= ultimate tensile toad at fracture in kilonewtons
A = average cross-sectional area of specimen in millimeters squared
5.2 Calculate the sIope of the thermally induced stress curve as follows:
Slope = fS/fT
where
fS = average change in stress along the linear portion of the curve just prior
to failure, in kilopascals
fiT = average change in temperature along the linear portion of the curve just
prior to failure, in degrees Celsius
6. REPORT
The test report shall include the following information:
6.1 Bituminous Mixture Description--bitumen type, bitumen content, aggregate
gradation, and air void percentage.
6.2 Time to Failure--hours:minutes:seconds
0.1°C
6.3 Specimen Temperature at Failure--average of 3 thermistor readings to the nearest
6.4 Cross-Sectional Area of Specimen--average as per section 3.2, to the nearest
lmm 2
6.5 Ultimate Load at Failure--maximum tensile load, to the nearest 0.04 kN
6.6 Fracture Strength--ldlopascals as per section 5.1, to the nearest 5 kPa
6.7 Slope of the Thermally Induced Stress Curve--ldlopascals per degree Celsius as
per section 5.2, to the nearest kPa
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