Analysis Instrument for Asphalt Testing

Analysis Instrument for Asphalt Testing

Published by Changsha Friend Experimental Analysis Instrument Co., Ltd.

Introduction

Beyond basic binder properties, advanced asphalt testing—dynamic shear rheometry (DSR), multiple stress creep recovery (MSCR), and fatigue testing—provides deeper insights into pavement performance. The Analysis Instrument for Asphalt Testing integrates these specialized modules for comprehensive rheological evaluation.

Advanced Test Modules

1. Dynamic Shear Rheometer (DSR)

• Applies oscillatory shear at frequencies of 0.1–100 rad/s and temperatures from 10–90 °C.

• Determines complex shear modulus (G*) and phase angle (δ).

2. Multiple Stress Creep Recovery (MSCR)

• Subjects samples to repeated creep and recovery cycles to assess rutting resistance.

3. Fatigue Beam Test

• Repeated bending of asphalt beams to quantify fatigue life at controlled strain or stress levels.

4. Thermo-Gravimetric Analysis (TGA) Interface

• Monitors mass loss under programmed heating to assess binder oxidative aging.

Instrument Features

• Temperature-Controlled Plates: Precision cooling/heating from –10 to 100 °C for rheology tests.

• High-Torque Motor & Torque Transducer: Measure low and high shear resistance with ±0.01 mN·m resolution.

• Automated Strain Control: Ensures uniform application of strain or stress for fatigue protocols.

• Modular TGA Dock: Allows sample transfer between rheometer and TGA furnace without exposure to ambient air.

Applications

• Pavement Design Labs: Generate master curves for performance-based specifications (AASHTO M 320).

• Polymer-Modified Binder Evaluation: Compare elastic recovery and rutting parameters.

• Rejuvenated Asphalt Research: Assess aging reversal and stiffness reduction.

• Longitudinal Studies: Monitor field-extracted binders for oxidative hardening and embrittlement.

Best Practices

• Sample Preparation: Cast thin films without air inclusions; allow overnight rest under controlled humidity.

• Geometry Calibration: Verify parallelism and gap settings before each DSR run.

• Pre-test Conditioning: Equilibrate samples for 10 minutes at test temperature.

• Software Updates: Keep analysis software current for compliance with evolving standardized algorithms.