In this study, a hard-grade paving asphalt with a penetration, of (0.1 mm) and a limestone aggregate were used to produce a hard-grade asphalt mixture AC - 20 (HaGAM). Basic performance tests, such as a wheel rutting test at 60°C, a three-point beam bending test at , and an indirect tensile strength test during freezing-thawing cycles, were conducted to evaluate the conventional properties of HaGAM. The viscoelastic property of HaGAM was investigated by conducting a uniaxial compression test, through which the resilient moduli and complex moduli were determined under variable conditions. The master curve of the complex moduli of HaGAM was constructed using a sigmoid model. The road performance of HaGAM is comparable to that of a styrene-butadiene-styrene (SBS-modified) asphalt mixture based on conventional properties. However, HaGAM shows better performance than the SBS-modified mixture in terms of resilient and complex moduli. Therefore, hard-grade asphalt could be used to resist permanent deformation and ultimately improve the long-term performance of asphalt pavements.
Performance Evaluation of Hard-Grade Paving Asphalt Mixture
2015-08-14
82015-01-01 pages
Article (Journal)
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