IP Library › Granted Patent US 12,234,190
Granted Patent B2
US 12,234,190 · App. 16/931,179 · Granted Feb 25, 2025

Electrically-conductive asphalt concrete containing carbon fibers

Inventors: Halil Ceylan (Ames, IA); Ali Arabzadeh (Ames, IA); Sunghwan Kim (Ames, IA); Alireza Sassani (Ames, IA); Kasthurirangan Gopalakrishnan (Mangalagiri, IN); Mohammad Ali Notani (Ames, IA)
Assignee: IOWA STATE UNIVERSITY RESEARCH FOUNDATION, INC.
C04B26/26C04B14/386C04B18/02C04B20/006C04B20/008C04B2111/94
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Quick Facts
Patent No.
US 12,234,190
App. No.
16/931,179
Granted
Feb 25, 2025
Kind
B2
Abstract

The present application relates to an electrically conductive asphalt mastic (ECAM) composition that includes an asphalt binder, a mineral filler, and a plurality of conductive carbon microfibers, between 3 and 12 mm in length, which are the sole source of electrical conductivity in the ECAM composition where the conductive carbon microfibers and the mineral filler are dispersed in the asphalt binder, and wherein said conductive carbon microfibers are present in the ECAM composition in an amount of less than 2.00% of total volume of the ECAM composition. The application further relates to an electrically conductive asphalt concrete (ECAC) composition that includes an asphalt binder, a mineral filler, an aggregate, and a plurality of conductive carbon microfibers, where the conductive carbon microfibers are the sole source of electrical conductivity in the electrically conductive asphalt concrete composition.

Claims (5)

1. An electrically conductive asphalt mastic (ECAM) composition comprising:

an asphalt binder;

a blended product, said blended product comprising a mineral filler, said mineral filler comprising particles with a diameter of less than 75 microns, and a plurality of conductive carbon microfibers, said conductive carbon microfibers being between 3 and 12 mm in length and being the sole source of electrical conductivity in the ECAM composition, wherein the mineral filler and the conductive carbon microfibers are dispersed in said asphalt binder, and wherein said conductive carbon microfibers are present in the ECAM composition in an amount of less than 2.00% of total volume of the ECAM composition, said blended product being prepared by drying an initial blend of the conductive carbon microfibers and the mineral filler having a water content of between 2% by weight and 10% by weight;

and a polymer additive,

wherein the composition has a void filled with asphalt (VFA) value of between 60.0% and 80.0% and a volume resistivity of between 1 Ω·cm and 50 Ω·cm, and wherein the composition comprises less than 10.0 wt % asphalt binder.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 13, 2021
From: CEYLAN, HALIL; ARABZADEH, ALI; KIM, SUNGHWAN; SASSANI, ALIREZA; GOPALAKRISHNAN, KASTHURIRANGAN; NOTANI, MOHAMMAD ALI
To: IOWA STATE UNIVERSITY RESEARCH FOUNDATION, INC.
Reel/Frame 058369/0902 →
Continuity (2)
Provisional Application 62878903 · Jul 26, 2019
Related Publication 20210024418A1 · Jan 28, 2021
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