Investigation of Static and Dynamic Response of Graphite and Carbon Fiber Modified Conductive Asphalt-Based Composite

Abstract

The conductive behavior of asphalt concrete can be improved with the addition of conductive materials, thus a multifunctional asphalt-based composite can be obtained. The conductive asphalt-based composite modified by graphite was studied extensively. Conductive materials percentages may have influences on performance of asphalt mixture. The performance of an asphalt pavement is significantly affected by its resistance to permanent deformation and its fatigue performance. The paper presents the results of a project aimed at investigating static and dynamic response as cracking and fatigue behaviors of conductive asphalt-based composite using the ITT. In particular ITT were performed in which the graphite percentages, loading mode was varied. As test results indicate that the addition of graphite shows positive influence on the indirect tensile strength, failure stiffness modulus in static loading test, especially in high loading speed. The number of load cycles to fatigue failure presents a bit decrease with graphite percentages in dynamic loading test. After adding discontinuous carbon fibers, conductive asphalt-based composite shows good fatigue property, which can prevent crack propagation. It can be concluded that the combined modification brings reinforcement effect to asphalt concrete and improves its mechanical and fatigue properties.

Current overview of carbon fiber: Toward green sustainable raw materials

“…With the growth of carbon fiber demand, many precursors have been considered for the production of carbon fibers, such as polyacrylonitrile (Kim et al 2014), asphalt (Lim et al 2019), viscose fibers (Wang et al 2016a), lignin (Meng et al 2019), polyvinyl alcohol (Mercader et al 2012), polyvinyl chloride (Liu et al 2018a), and so on. Of these, only three main kinds of carbon fiber raw materials have been manufactured at commercial scale: PAN-carbon fiber (Liu et al 2015), viscose-based carbon fiber (Gorina and Cheblakova 2016), and asphalt-based carbon fiber (Li et al 2008).…”

Preparation and Properties of Composite Graphene/Carbon Fiber Pouring Conductive Asphalt Concrete

“…The influence of carbon fiber with different sizes on its pressure sensitivity characteristics is obvious [14]. Although the single addition of carbon fiber conductive phase material in asphalt concrete can significantly improve the pavement performance of asphalt concrete, the improvement effect on its electrical conductivity is poor [15]. The resistivity of specimens with 25% graphite (asphalt mass fraction) and 0.4% carbon fiber (aggregate mass fraction) was significantly reduced [16,17].…”

Determination of Creep Parameters of Conductive Asphalt Concrete

“…In many papers [3][4][5][6], the Burgers model is often applied as a main rheological model, because it is very close to the practical situations. Besides, it is few to research rheological performance of conductive asphalt concrete of which mechanical performance is focused on static and dynamic response [7,8].…”