US 12,304,862 B2
Conductive mortar
Thomas Moser, Zürich (CH); Jürg Sturzenegger, Wolfhausen (CH); Fabio Würmli, Baar (CH); and Steffen Kelch, Oberengstringen (CH)
Assigned to SIKA TECHNOLOGY AG, Baar (CH)
Appl. No. 17/609,091
Filed by SIKA TECHNOLOGY AG, Baar (CH)
PCT Filed May 28, 2020, PCT No. PCT/EP2020/064809
§ 371(c)(1), (2) Date Nov. 5, 2021,
PCT Pub. No. WO2020/239893, PCT Pub. Date Dec. 3, 2020.
Claims priority of application No. 19176999 (EP), filed on May 28, 2019.
Prior Publication US 2022/0212991 A1, Jul. 7, 2022
Int. Cl. C04B 18/06 (2006.01); C04B 28/04 (2006.01); C04B 111/00 (2006.01); C04B 111/60 (2006.01); C04B 111/94 (2006.01)
CPC C04B 18/067 (2013.01) [C04B 28/04 (2013.01); C04B 2111/00508 (2013.01); C04B 2111/60 (2013.01); C04B 2111/94 (2013.01); C04B 2201/32 (2013.01)] 13 Claims
 
1. A method comprising:
preparing a mixture including a binder composition comprising at least one binder and at least one mineral filler, and
curing the mixture to produce a material having improved electrical conductivity at 20° C., wherein:
the at least one binder comprises at least one epoxy resin and at least one hardener for the epoxy resin or at least one polyisocyanate and at least one polyol and is free of mineral binders,
the binder composition comprises at least 85% by weight of the at least one mineral filler, based on a total dry weight of a dry binder composition,
at least 60% by weight of the at least one mineral filler is iron-containing slag, and
the improved electrical conductivity is present when the electrical resistance of the cured mixture is decreased by a factor of at least 1.5 compared to a cured material which has a same composition as the cured mixture but contains silica sand instead of the iron-containing slag whereby the silica sand and the iron-containing slag are of a same particle size, wherein the electrical resistance is a surface resistance measured according to AASHTO 95-11 or a volume resistance measured according to an electrochemical impedance spectroscopy (EIS) method.