TSAR™ Software (Thermal Stress Analysis Routine) 

The BBR and DTT methods were developed as part of SHRP. Recently, the low temperature requirements have been refined to predict at which temperature a binder fails in single event thermal cracking. This temperature will replace the currently used specification limits (stiffness, m-value and failure strain).

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For asphalt producers, agencies and test laboratories this software provides a vital tool to classify binder systems.

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The data from the BBR and DTT tests are entered into a spreadsheet. The BBR data is then used to compute the thermal stress in the pavement using the specified cooling rate and other material parameters such as the coefficient of linear expansion. A plot of stress versus temperature is then developed. The DTT test data is compared to the induced stress and the critical cracking temperature determined. Alternatively, a pass/fail criteria is applied to certify if a binder meets a specific SHRP binder grade at the temperatures evaluated.

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TSAR Plus™ is a necessary upgrade for R&D groups which contains enhanced features that makes master curves generation as easy as the click of a mouse pointer.

• Four types of Master Curve Analysis (Discrete Spectrum, Christiansen-Anderson, Christiansen-Anderson-Sharrock, Christiansen-Anderson-Marasteanu) - the master curve information is available to the user.

• Thermal stress is calculated using the Master Curve selected (if Discrete Spectrum is selected then no thermal stress calculation is currently possible).

• Glass transition temperature, coefficient of linear expansion, cooling rate can be changed.

• The report contains data for the master curve selected.

• Any number of BBR isotherms can be used.

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For information on obtaining this software please contact info@abatech.com