Journal Published Online: 10 July 2019
Volume 48, Issue 3

Study of the Effect of Aggregate Geometry Characteristics on the Rheology of Asphalt Mortar Using Newly Developed Material Rheological Property Test Analyzer and Aggregate Image Measurement System

CODEN: JTEVAB

Abstract

A new rheometer developed in the laboratory and the Aggregate Image Measurement System (AIMS) were used to study the effect of aggregate geometry characteristics on the rheological properties of asphalt mortar. AIMS was used to investigate the geometry characteristics (angularity index and Form 2-D) of two aggregates including steel slag and basalt. The results showed that steel slag had a better Form 2-D and angularity index, representing a better particle distribution and shape property. A material rheological property test analyzer was applied to evaluate the rheological properties of pure and styrene-butadiene-styrene (SBS)-modified asphalt and their asphalt mortars at 20°C and 40°C, and then the data were modeled through the simulation software. As a kind of rigid body, the addition of aggregate had a great influence on the rheological properties of asphalt. The experiment results indicated that, after the addition of aggregate or SBS, the rheological model of asphalt samples was still Burges model accompanied by the change of rheological parameters. As a kind of temperature-sensitive material, temperature was the most important factor for determining the rheological properties of asphalt. The addition of SBS promoted the elastic deformation of asphalt and restrained the viscous deformation of asphalt. The effect of aggregates with high Form 2-D and angularity index on the rheological properties of asphalt was weaker.

Author Information

Li, Hechuan
State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan, China
Wu, Yaqi
School of Foreign Languages, China University of Geosciences (Wuhan), Wuhan, China
Yu, Jianying
State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan, China
Wu, Shaopeng
State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan, China
Li, Yuanyuan
State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan, China
Pages: 16
Price: $25.00
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Details
Stock #: JTE20190162
ISSN: 0090-3973
DOI: 10.1520/JTE20190162