Journal Published Online: 18 October 2022
Volume 51, Issue 2

Experimental Research of Various Evaluation Indices on Predicting the Influences of Internal and External Factors on Asphalt-Filler Interaction Ability

CODEN: JTEVAB

Abstract

The physicochemical interaction between asphalt binder and mineral filler plays a key role in deciding the rheological responses of asphalt mastic. Currently, several indices have been proposed to quantify asphalt-filler interaction ability, such as ΔG, K-B-G, and KE based on complex modulus as well as K-B-δ and L-A-δ dependent on phase angle. Much research has confirmed that asphalt-filler interaction degree is closely related to internal and external factors, including asphalt binder and filler characteristics, filler concentration, temperature, and so on. Therefore, investigating whether current indices could accurately describe the influences of these factors on asphalt-filler interaction ability is a significant aspect evaluating their accuracy and feasibility. To this end, the rheological parameters of asphalt binder and corresponding mastics were measured and used to calculate different evaluation indices. The results showed that ΔG, K-B-G, and KE exhibited superior performance on accurately reflecting the effects of external factors by comparison in K-B-δ and L-A-δ. For the internal factors, the indices based on complex modulus could successfully distinguish the interaction ability difference of asphalt binder with active and inert fillers, whereas only ΔG presented excellent performance in terms of measuring the asphalt-filler interaction ability with filler concentration changing. In addition, all of the indices failed to distinguish the interaction degree difference of filler to Pen70 and Pen90 asphalts except certain test conditions, indicating the modification of current indices should consider asphalt components.

Author Information

Li, Fan
College of Civil Engineering, Taiyuan University of Technology, Taiyuan, Shanxi Province, China
Zhang, Xiao
College of Civil Engineering, Taiyuan University of Technology, Taiyuan, Shanxi Province, China
Meng, Suyun
School of Civil Engineering, Shenyang Jianzhu University, Shenyang City, Liaoning, China
Zhao, Guoqing
School of Civil Engineering, Shenyang Jianzhu University, Shenyang City, Liaoning, China
Yang, Yuyou
School of Engineering and Technology, China University of Geosciences (Beijing), Beijing, China
Pages: 15
Price: $25.00
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Stock #: JTE20220194
ISSN: 0090-3973
DOI: 10.1520/JTE20220194