Evaluation of Performance of Void-Reducing Asphalt Membrane and Tack Coat on Asphalt Mixtures’ Longitudinal Joints

Rahaman, Mohammed Ziaur; Lee, Jusang; Jeon, Jongmyung; Nantung, Tommy

doi:10.1061/(asce)mt.1943-5533.0004635

Cited by 1 publication

(1 citation statement)

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“…For asphalt pavement in service, the damage caused by water is actually a very complex process. Studies have shown that free water infiltrating into the interior of asphalt pavement structure will form super-porous water flow under the action of vehicle load, and the asphalt pavement undergoing the dual action of load and pore water scouring finally generates structural damage [ 9 , 10 , 11 ]. Therefore, the effect of dynamic water pressure cannot be ignored for asphalt pavement in service.…”

Section: Introductionmentioning

confidence: 99%

Water Stability of Fibers-Enhanced Asphalt Mixtures under Static and Dynamic Damage Conditions

Xiao,

Wang,

Chen

et al. 2024

Materials

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Water damage is one of the major distresses of asphalt pavements. Existing methods for investigating the water stability of asphalt mixtures rely primarily on static water test methods, the tensile strength ratio (TSR) test, and the retained Marshall stability (RMS) test, which evaluate the strength and stability loss after freeze-thaw damage or hot water immersion, respectively. However, these methods do not accurately replicate the actual dynamic water damage conditions to pavement. Therefore, in this study, a variety of damage conditions, including static water conditions and dynamic water pressure conditions, were used to investigate the effects of lignin fibers (LFs), polyester fibers (PFs), and polypropylene fibers (PPFs) on the water stability of asphalt mixtures. First, three fibers-enhanced SMA gap-gradation asphalt mixtures were designed. Then, TSR and RMS were measured under traditional static water damage conditions and new dynamic water pressure damage conditions to evaluate the effect of fiber types on the water stability of asphalt mixtures. Finally, the void rate of asphalt mixtures and its changes under dynamic water damage conditions were further revealed with the help of CT scanning technique. Results showed that, among these three types of fibers, PFs-enhanced asphalt mixture exhibited excellent stability under both static and dynamic water conditions, and the CT scanning test also indicated that the PFs can significantly reduce the increase rate of voids in asphalt mixtures after dynamic water pressure damage. This study identified the potential of incorporating suitable type of fiber to enhance the performance of asphalt mixture under dynamic water pressure damage.

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Section: Introductionmentioning

confidence: 99%