SHRP-A-379 traducir

Standard Method of Test for
Determining the Creep Compliance and Strength
of Modified and Unmodified Hot Mix Asphalt Using
Indirect Tensile Loading Techniques
SHRP Designation: M-0051
I. SCOPE
1.1 This method covers the determination of creep compliance and strength at
different loading times using diametral loadings (commonly referred to as indirect tensile
testing) for compacted, dense-graded, hot-mixed, hot-laid bituminous mixtures. Indirect
tensile testing is used to characterize asphalt concrete mixtures in tension for thermal and
fatigue cracking analyses.
1.2 The indirect tensile creep and failure tests are intended for low-temperature
characterization (0°C and below) of cylindrical laboratory compacted and/or field-cored
asphalt concrete specimens. The primary goal of the test method is to determine the master
compliance curve and failure limits (strength, strain or energy) as a function of temperature,
which are required inputs into a mechanistic-based low temperature cracking performance
prediction model.
1.3 The test method also provides strength information and data required at
temperatures less than 20°C to estimate the number of loading cycles to propagate a crack
through an asphalt concrete layer in fatigue cracking predictions that use fracture mechanics.
1.4 This method is applicable to dense-graded, hot-mixed, hot-laid asphalt concrete
mixtures, as defined by ASTM D 3515 (Bituminous Paving Mixtures, Hot-Mix, Hot-Laid),
and may be used on cores recovered from roadways or cylindrical specimens compacted in
the laboratory.
1.5 The values of creep compliance and tensile strength determined with this method
can be used in linear-elastic and non-linear elastic layered system theories to calculate the
low temperature and fatigue cracking potential of asphalt concrete layers subjected to thermal
and wheel loadings.
1.6 The values stated in SI units are to be regarded as the standard.
_Thisstandardis basedon SHRPProduct 1022.
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