000012414 001__ 12414
000012414 005__ 20160816141444.0
000012414 04107 $$aeng
000012414 046__ $$k2016-05-09
000012414 100__ $$aHlaváček, P.
000012414 24500 $$aACCELERATED CHLORIDE MIGRATION TESTS IN CONCRETE

000012414 24630 $$n22.$$pEngineering Mechanics 2016
000012414 260__ $$bInstitute of Thermomechanics AS CR, v.v.i., Praha
000012414 506__ $$arestricted
000012414 520__ $$2eng$$aAccelerated chloride migration tests are performed on cylindrical samples made of Portland cement concrete. Low voltage electric field is applied as a driving force for both chloride accelerated penetration and extraction. It is verified that the chloride concentration profile measured in samples after 48 hours of electromigration approximately corresponds to the chloride profile after six months of natural diffusion. Potential and effectiveness of the chloride extraction process for the rehabilitation of concrete in terms of lowering the chloride concentration using the DC current is discussed. Experiments show up to 50% decrease in chloride concentration in concrete after 48 hours of extraction driven by electric field with the reverse polarity. Simulation of the process is provided using analytical and numerical solutions of partial differential equations with a simplification in form of the constant diffusion coefficient.

000012414 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000012414 653__ $$aConcrete, Chlorides, Diffusion, Electromigration, Chloride Extraction

000012414 7112_ $$aEngineering Mechanics 2016$$cSvratka, CZ$$d2016-05-09 / 2016-05-12$$gEM2016
000012414 720__ $$aHlaváček, P.$$iNěmeček, J.
000012414 8560_ $$ffischerc@itam.cas.cz
000012414 8564_ $$s547122$$uhttps://invenio.itam.cas.cz/record/12414/files/044bo_o_sol.pdf$$yOriginal version of the author's contribution as presented on CD, id 044, section SOL.
000012414 962__ $$r12369
000012414 980__ $$aPAPER