Material Design and Property of High Viscosity Asphalt Used in Pervious Asphalt Pavement

Chen, Shuan Fa; Zhu, Si Yue; Qin, Xian Tao; Li, Zu Zhong

doi:10.4028/www.scientific.net/amr.753-755.495

Cited by 5 publications

(1 citation statement)

References 4 publications

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“…In our previous study, which focused on improving the road performance of porous asphalt, we meticulously determined the material composition of SHVA. This involved selecting the most suitable type of neat asphalt and precisely defining the type and dosage of each modifier, encompassing polymers, compatibilizers, and stabilizers [ 22 ]. In addition, the formula for SHVA has been continuously refined.…”

Section: Introductionmentioning

confidence: 99%

Thermal Aging Degradation of High-Viscosity Asphalt Based on Rheological Methods

Zhu,

Qin,

Liao

et al. 2023

Materials

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With the acceleration of the construction of sponge cities in China, porous asphalt pavement (PA) is has been widely used. High-viscosity asphalt (HVA) is the core material in building PA because it has good rheology properties, which can provide good raveling and rutting resistance. However, due to the open-graded structure of PA, HVA was more susceptible to rapid aging, which significantly affects the durability of PA. To investigate the thermal aging effect on the rheological properties of self-modified HVA (SHVA), five types of asphalts were aged using a rolling thin film oven (RTFO) and pressure aging vessel (PAV). Then, rheological tests were adopted, such as temperature sweep test (TS), repeated creep and recovery test (RCR), and bending beam rheometer test (BBR). The results indicate that during the aging process, the oxidation-induced hardening effect of neat asphalt and the degradation-induced softening effect of the modifier changes the rheology properties of HVA significantly. As the aging progresses, the contribution of the modifiers of HVA to anti-aging performance is greatly reduced. At high temperatures, HVA demonstrates better anti-aging performance than conventional styrene–butadiene–styrene (SBS)-modified asphalt (Guo Chuang, GC). The change of the high-temperature rheological indices of the two HVA types (SHVA and TAFPACK-super HVA (TPS)) showed a smaller activation energy index (EAI), a more considerable viscous component of binder creep stiffness (Gv), and more minor accumulated stain (racc), indicating a more significant anti-short-term and long-term aging performance, which is beneficial to the high-temperature performance of asphalts. However, the changes in low-temperature rheological properties do not align with those in high-temperature rheological properties after long-term aging. The BBR test results reveal that TPS exhibits worse low-temperature performance than GC and SHVA. During the thermal aging process, the contribution rate of the modifiers in SHVA against RTFO and PAV aging is higher than that of the modifiers in TPS, which contributes to the superior anti-aging property. Overall, SHVA demonstrates the best anti-aging performance among the five asphalts tested.

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Section: Introductionmentioning

confidence: 99%

Thermal Aging Degradation of High-Viscosity Asphalt Based on Rheological Methods

Zhu,

Qin,

Liao

et al. 2023

Materials

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Roles of aromatic oil, polyphosphoric acid and sulfur on the storage stability and compatibility of high-viscosity particle modified asphalt

Zheng

Wang²,

Wu³

et al. 2022

Construction and Building Materials

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Dynamic Viscosity Standard of High Viscosity Modified Asphalt Considering Temperature and Load Coupling Effect

Li²,

et al. 2021

IOP Conf. Ser.: Mater. Sci. Eng.

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The anti-ravelling and anti-rutting performances of porous asphalt pavement are significantly affected by dynamic viscosity of high viscosity modified asphalt. Climatic and traffic conditions vary greatly due to the vast territory of China, and dynamic viscosity standard has not been recommended up to now aiming at different temperature and load conditions. The influence of high viscosity additive dosage on key property indexes was firstly analysed for asphalt and asphalt mixture, and appropriate dosage was recommended. The dynamic stability changing law of porous asphalt mixture was revealed under different temperature, load and their coupling conditions. Multiple regression relation of them was established. Finally dynamic viscosity standard was proposed considering temperature/load coupling effect. The research results show that when high viscosity additive dosage exceeds 10% for 70# base asphalt, the increasing trend of dynamic viscosity becomes slowing down. Semi-logarithmic relations of dynamic stability with ravelling loss, Marshall stability were respectively found, and double-logarithmic relation of that with dynamic viscosity was found. The appropriate dosage of high viscosity additive is recommended as 12%. Based on multiple regression formula of dynamic stability with dynamic viscosity, temperature and load, the lower limit of 60°C dynamic viscosity is recommended as 50000Pa•s for normal region, 100000Pa•s for heavy-load region, 200000Pa•s for high-temperature region, and 400000Pa•s for heavy-load & high-temperature region.

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Material Design and Property of High Viscosity Asphalt Used in Pervious Asphalt Pavement

Cited by 5 publications

References 4 publications

Thermal Aging Degradation of High-Viscosity Asphalt Based on Rheological Methods

Thermal Aging Degradation of High-Viscosity Asphalt Based on Rheological Methods

Roles of aromatic oil, polyphosphoric acid and sulfur on the storage stability and compatibility of high-viscosity particle modified asphalt

Dynamic Viscosity Standard of High Viscosity Modified Asphalt Considering Temperature and Load Coupling Effect

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