Comparative evaluation of the aging performance of hard asphalts using physical chemical relationships. Issue 3 (1st February 2017)

• Record Type: Journal Article
• Authors: Tong, Yujun; Shen, Benxian; Liu, Jichang; Ning, Aimin
• Is Part Of: Energy sources. Volume 39:Issue 3(2017)
• Page Start: 264
• Page End: 270
• Publication Date: 2017-02-01
• Subjects: Aging kinetics -- aging resistance performance -- chemical structures -- solvent deasphalting -- 30# hard asphalt; Natural resources -- Periodicals; Energy consumption -- Periodicals; Energy consumption -- Climatic factors -- Periodicals; Energy conversion -- Periodicals; Energy conversion -- Environment aspects -- Periodicals; Power (Mechanics) -- Periodicals; 333.7905
• DOI: 10.1080/15567036.2016.1214642
• Languages: English
• ISSNs: 1556-7036

Abstract

ABSTRACT: Two 30 # asphalts were prepared by solvent deasphalting of Oman residue and Saudi residue and their properties were evaluated. Results indicated that Oman 30 # asphalt exhibited excellent high- and low-temperature performance and aging resistance performance compared to Saudi 30 # asphalt. Based on n -pentane asphaltene content, the aging process of two 30 # asphalts followed a first-order kinetic reaction equation. Oman 30 # asphalt had higher activation energy and a lower reaction rate constant than Saudi 30 # asphalt. Changes of compositions and molecular weight distribution of asphalts in aging process revealed that asphalt aging reaction mainly included dissociation and condensation. There existed a significant difference in compositions and chemical structures of 30 # asphalts; high aromatic content, high asphalt colloidal stable index, and short alkyl side chains were beneficial to improvement of aging resistance performance.