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Abstract

In order to develop high-viscosity modified asphalt that meets the technical requirements of JTG/T 3350-03-2020 Technical Specifications for Design and Construction of Porous Asphalt Pavement, the influence of modifiers and stabilizers on the performance of high-viscosity modified asphalt was studied by using Sinopec Donghai asphalt as the base material through control variable method. The asphalt modification process was optimized by a uniform design test, and the road performance of the modified asphalt with high viscosity was evaluated by PAC-13 gradation. The results show that the high-viscosity modified asphalt prepared by Donghai asphalt through the wet process can fully meet the index requirements, and its dynamic viscosity at 60 °C is greater than 5 × 104 Pa·s and can be customized according to demand. Meanwhile, its Brookfield viscosity at 170 °C is low, which is conducive to uniform mixing of the mixture. The self-developed MAW-2 stabilizer can not only make the storage stability of the high-viscosity modified asphalt meet the requirements of the standard but also cooperate with the polymer modifier to improve the dynamic viscosity of the asphalt and its high temperature property. When the void ratio of the mixture is 20.3%, its Marshall stability can reach 12.7 kN, and the flyaway loss in the Cantabro test and flooding test is low at 20 °C, indicating good high temperature stability, which can effectively prevent the stone flying and other problems of the drainage asphalt pavement.

Publication Date

1-18-2024

DOI

10.14048/j.issn.1671-2579.2022.06.042

First Page

220

Last Page

225

Submission Date

May 2025

Reference

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