US 12,234,190 B2
Electrically-conductive asphalt concrete containing carbon fibers
Halil Ceylan, Ames, IA (US); Ali Arabzadeh, Ames, IA (US); Sunghwan Kim, Ames, IA (US); Alireza Sassani, Ames, IA (US); Kasthurirangan Gopalakrishnan, Mangalagiri (IN); and Mohammad Ali Notani, Ames, IA (US)
Assigned to IOWA STATE UNIVERSITY RESEARCH FOUNDATION, INC., Ames, IA (US)
Filed by Iowa State University Research Foundation, Inc., Ames, IA (US)
Filed on Jul. 16, 2020, as Appl. No. 16/931,179.
Claims priority of provisional application 62/878,903, filed on Jul. 26, 2019.
Prior Publication US 2021/0024418 A1, Jan. 28, 2021
Int. Cl. C04B 26/26 (2006.01); C04B 14/38 (2006.01); C04B 18/02 (2006.01); C04B 20/00 (2006.01); C04B 111/94 (2006.01)
CPC C04B 26/26 (2013.01) [C04B 14/386 (2013.01); C04B 18/02 (2013.01); C04B 20/006 (2013.01); C04B 20/008 (2013.01); C04B 2111/94 (2013.01)] 1 Claim
OG exemplary drawing
 
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.