000021392 001__ 21392
000021392 005__ 20170522124352.0
000021392 04107 $$aeng
000021392 046__ $$k2017-05-15
000021392 100__ $$aNěmeček, J.
000021392 24500 $$aMODELING OF CHLORIDE MIGRATION IN CONCRETE

000021392 24630 $$n23.$$pEngineering Mechanics 2017
000021392 260__ $$bBrno University of Technology, Institute of Solid Mechanics, Mechatronics and Biomechanics, Brno
000021392 506__ $$arestricted
000021392 520__ $$2eng$$aIn many cases, reinforced concrete structures are influenced by penetration of deteriorating salts that cause corrosion of the steel reinforcement. From a micro-structural point of view, concrete is a heterogeneous composite with tortuous pore microstructure with partially or fully saturated pores. Water in pores allows salt ions to be dissolved and transported towards reinforcement. Different mechanisms such as diffusion or convection take place. The ion convection can be caused by electromotive force acting on charged particles and is caused by an electrical potential gradient. This contribution is devoted to modeling of the diffusion-convection problem applied to chloride migration in concrete. The influence of an external electric field is studied and problems of chloride penetration and extraction are solved. It is shown in the paper that the electric field accelerates the chloride migration by multiple times compared to natural diffusion and can be used as an efficient treatment for rehabilitation of reinforced concrete structures affected by chloride attack.

000021392 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000021392 653__ $$aReinforced concrete, Chlorides, Electromigration, Diffusion, Convection.

000021392 7112_ $$aEngineering Mechanics 2017$$cSvratka, CZ$$d2017-05-15 / 2017-05-18$$gEM2017
000021392 720__ $$aNěmeček, J.$$iKoudelka, T.$$iKruis, J.
000021392 8560_ $$ffischerc@itam.cas.cz
000021392 8564_ $$s1011586$$uhttps://invenio.itam.cas.cz/record/21392/files/0710.pdf$$yOriginal version of the author's contribution in proceedings, page 710, section SOL.
000021392 962__ $$r21225
000021392 980__ $$aPAPER