Preparation and evaluation of 30# hard grade asphalt. (4th March 2017)

• Record Type: Journal Article
• Authors: Tong, Yujun; Shen, Benxian; Liu, Jichang; Yao, Zhengtian; Fang, Weifeng
• Is Part Of: Petroleum science and technology. Volume 35:Number 5(2017)
• Page Start: 436
• Page End: 442
• Publication Date: 2017-03-04
• Subjects: 30# hard grade asphalt -- asphalt mixture -- blending technology -- deoil asphalt -- PG grade; Liquid fuels -- Periodicals; Petroleum -- Periodicals; 665.505
• DOI: 10.1080/10916466.2016.1261161
• Languages: English
• ISSNs: 1091-6466

Abstract

ABSTRACT: The preparation and evaluation of 30# hard grade asphalt by blending softening point hard deoil asphalt with several soft components were investigated. The results showed that the properties and proportions of blending soft components had a great influence on the properties of 30# asphalt. Chunfeng 70# asphalt and Maoming deoil asphalt were more suitable as blending soft components and their blended asphalt met the technical requirements of GB/T 15180-2010 when the proportion of hard deoil asphalt were 6–12% and 8–16%, respectively. PG grade results indicated that dynamic modulus of 30# asphalts at high temperature increased significantly, and antirutting ability was also improved notably, while the bending resistant ability at low temperature was slightly inferior to the high-grade asphalt. The results of mix performance tests showed that 30# hard grade asphalt had excellent anti–high-temperature deformation ability and preferable water stability compared with high-grade asphalts.