Asphalt Tests

Superpave Shear Tester

Superpave Shear Tester
Overview The Superpave Shear Tester (SST) (Figure 1) is used to characterize a HMA mixture's resistance to permanent deformation...

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Absolute Viscosity

Absolute Viscosity
Viscosity is simply a measure of a fluid’s resistance to flow and is described by the following equation: Asphalt...

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HMA Performance Tests

HMA Performance Tests
Performance tests are used to relate laboratory mix design to actual field performance.  The Hveem (stabilometer) and Marshall (stability...

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Mixture Characterization Tests

Mixture Characterization Tests
Mixture characterization tests are used to describe fundamental mixture parameters such as density and asphalt binder content.  The three...

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Flash Point

Flash Point
A typical flash point test involves heating a small sample of asphalt binder in a test cup. The temperature...

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Asphalt Mixture Performance Test

Asphalt Mixture Performance Test
Overview The asphalt mixture performance tester (AMPT) is the companion performance test for use with the Superpave mix design...

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Binder Content

Binder Content
Overview Asphalt binder content affects HMA mixture performance in the areas of stiffness, strength, durability, fatigue life, raveling, rutting...

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Bulk Specific Gravity

Bulk Specific Gravity
Overview The bulk specific gravity test is used to determine the specific gravity of a compacted HMA sample by...

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Laboratory Wheel Tracking Devices

Laboratory Wheel Tracking Devices
Overview Laboratory wheel-tracking devices (Figure 1) are used to run simulative tests that measure HMA qualities by rolling a...

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Moisture Susceptibility

Moisture Susceptibility
Moisture susceptibility is a primary cause of distress in HMA pavements. HMA should not degrade substantially from moisture penetration...

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Theoretical Maximum Specific Gravity

Theoretical Maximum Specific Gravity
Overview The theoretical maximum specific gravity (Gmm) of a HMA mixture is the specific gravity excluding air voids. Thus,...

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