Assessment of rheological properties of asphalt binder modified with babassu oil

被引：2

作者：

Neto, Osires de Medeiros Melo ^{[1
]}

Silva, Ingridy Minervina ^{[1
]}

Lucena, Leda Christiane de Figueiredo Lopes ^{[1
]}

Lucena, Luciana de Figueiredo Lopes ^{[2
]}

de Sousa, Talita Miranda ^{[1
]}

Hu, Jong Wan ^{[3
,4
]}

Youssef, Ahmed ^{[5
]}

机构：

[1] Univ Fed Campina Grande, Dept Civil Engn, Aprigio Veloso 882, BR-58428830 Campina Grande, PB, Brazil

[2] Univ Fed Rio Grande do Norte, Sch Sci & Technol, Passeio Girassois 300, BR-59077080 Natal, RN, Brazil

[3] Incheon Natl Univ, Dept Civil & Environm Engn, Incheon 22022, South Korea

[4] Incheon Natl Univ, Incheon Disaster Prevent Res Ctr, Incheon 22022, South Korea

[5] Sinai Univ, El Arish Fac Engn, Civil Engn Dept, Cairo, Egypt

来源：

CASE STUDIES IN CONSTRUCTION MATERIALS | 2024年 / 21卷

关键词：

Aging; Costs; Rejuvenating agent; Rheology; Stiffness; Vegetable oil; PERFORMANCE;

D O I：

10.1016/j.cscm.2024.e03599

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Reducing dependence on specific types of vegetable oils for Reclaimed Asphalt Pavement (RAP) rejuvenation is critical. Babassu oil, extracted from palm trees, emerges as a promising candidate. This study evaluates the addition of babassu oil to asphalt binder (penetration grade 50/70) in proportions ranging from 1 % to 12 %. Both direct addition of the oil and incorporation as part of a modified binder in long-term aged binder were tested. A total of 41 samples underwent physical and rheological testing, complemented by aging protocols. The findings indicate that babassu oil significantly decreases binder stiffness, as evidenced by reduced viscosity and performance grade. Samples containing 7-12 % oil enabled the production of warm mix asphalt at temperatures between 141 degrees C degrees C and 150 degrees C. degrees C. The addition of 3 % or more oil mitigated the effects of thermal aging. The oil-modified binder demonstrated superior performance compared to direct oil addition in terms of reducing the stiffness of aged binder. Higher oil contents (greater than 4 %) enhanced the interaction, potentially allowing for an increase in RAP content. The integration of babassu oil into asphalt not only improves sustainability but also enhances economic efficiency, thereby supporting the principles of a circular economy.

引用

页数：23

共 75 条

[1]

AASHTO, 2021, AASHTO M 320

[2] Using Crude Vegetable-Based Oils and Antioxidants to Improve the Performance of Asphalt Binders [J].