Loading…

Study on the graphite and carbon fiber modified asphalt concrete

► Graphite improve electrical property but impair mechanical property of asphalt mixture. ► We study the mechanical performance and electrical property were improved greatly. ► We study modified asphalt concretes for the self-monitoring of strain. The mechanical and electrical properties of graphite...

Full description

Saved in:
Bibliographic Details
Published in:Construction & building materials 2011-04, Vol.25 (4), p.1807-1811
Main Authors: Liu, Xiaoming, Wu, Shaopeng
Format: Article
Language:English
Subjects:
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:► Graphite improve electrical property but impair mechanical property of asphalt mixture. ► We study the mechanical performance and electrical property were improved greatly. ► We study modified asphalt concretes for the self-monitoring of strain. The mechanical and electrical properties of graphite and carbon fiber modified asphalt concrete were measured in this paper through the indirect tensile test. The experimental results indicate that the mechanical properties of asphalt mixture are influenced by the addition of conductive component like graphite and carbon fiber, When the graphite content increased from 0 to 22 vol.%, Marshall stability decreased from 12.8 kN to 9.43 kN and residual stability from 91.1% to 87.2%. Rutting dynamic stability decreased from 3318 times/mm to 2619 times/mm. After adding the carbon fiber, when the carbon fiber content increased from 0 to 2 vol.%, their Marshall stability and residual stability increased from 12.8 kN to 13.5 kN and residual stability from 91.1% to 92.7%. Rutting dynamic stability increased from 3318 times/mm to 3403 times/mm. When modified through combination effect of graphite and carbon fiber mixed fillers, the mechanical performance and electrical property were improved greatly, their Marshall stability and residual stability has increased from 9.43 kN to 12.1 kN and residual stability from 87.2% to 89.2%. Rutting dynamic stability increased from 2619 times/mm to 3292 times/mm. Furthermore, the resilient modulus is influenced by the addition of graphite, the value of resilient modulus is as much as that of the original, it is 90% when graphite is 30 vol.% and is 70% when graphite is 45 vol.%. The electrical resistance increases reversibly with increasing tensile strain either under dynamic indirect tensile testing or static indirect tensile testing, graphite and carbon fiber modified asphalt concretes are effective for the self-monitoring of strain. It is foreseen that the strain–stress self monitoring is valuable for weighing, traffic monitoring, border monitoring and structural vibration control.
ISSN:0950-0618
1879-0526
DOI:10.1016/j.conbuildmat.2010.11.082