Modification of properties of reinforced concrete through nanoalumina electrokinetic treatment

Wu, Hong; Isfahani, Forood Torabian; Jin, Weiliang; Xu, Chunxiang; Redaelli, Elena; Bertolini, Luca

doi:10.1016/j.conbuildmat.2016.09.098

Cited by 13 publications

(7 citation statements)

References 21 publications

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“…Electrochemical remediation techniques are based on the accelerated transport of charged particles or ions inside pore structure under application of an electric field [21,56]. Recently, electrokinetic nanoparticle (EN) treatment was introduced to improve the microstructure of concrete and upgrading the durability by blocking the concrete pores.…”

Section: Electrokinetic Treatment Of Hardened Concretementioning

confidence: 99%

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Electrokinetics Application in Concrete and Well Construction

Jafariesfad

Sangesland

Gawel

et al. 2020

Volume 11: Petroleum Technology

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Electrically induced or coupled transport processes including electrophoresis, electroosmosis and electromigration in solutions and porous media under an external electric field have been extensively studied and employed in many disciplines. For protection and rehabilitation of concrete structures, cathodic protection, electrochemical realkalization, and chloride extraction are extensively used. Other electrokinetic techniques are developed for the concrete industry, but have not been widely used so far, including electrokinetic treatment processes, for corrosion mitigation, recovery from sulfate attack, crack healing, and porosity and permeability reduction. These processes can improve the microstructure of the cement-based systems resulting in an improved performance in long-term and can be applied to repair failed structures. Application of electrokinetic processes are rapidly extended in well construction due to the increased interest in techniques enabling manipulation of micro- and nanosized particles. The techniques could be beneficial in building a robust cement sheath in oil and gas wells. Additionally, electrokinetic remediation techniques can possibly be introduced for repairing damaged structures in oil and gas wells. This review provides an overview of electrokinetic-based techniques, which has been introduced to cement-based materials, mainly reinforced concrete. The potential application of these techniques in oil well construction is discussed.

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Section: Electrokinetic Treatment Of Hardened Concretementioning

confidence: 99%

“…Electrokinetic treatment for 15 days and current densities up to 1.5 A/m 2 , the bond strength of rebar-concrete interface increased considerably. [56]…”

Section: Improving Bonding Strengthmentioning

confidence: 99%

Electrokinetics Application in Concrete and Well Construction

Jafariesfad

Sangesland

Gawel

et al. 2020

Volume 11: Petroleum Technology

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“…[5][6][7] There are several methods for preventing corrosion in reinforced steel, such as cathodic protection, electrochemical realkalization, and electro-osmotic migration. [8][9][10][11] The use of a migration corrosion inhibitor (MCI) is a very effective method for protecting steel reinforcements. [12,13] MCIs can penetrate into the concrete through diffusion and capillary sorption, forming a protective film on the surface of the steel reinforcement or repair the damaged passive film on the steel surface.…”

Section: Introductionmentioning

confidence: 99%

Study of the migration behaviours of imidazoline corrosion inhibitor in concrete using UV–vis spectrophotometry

et al. 2020

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In this study, UV–visible light spectrophotometry was used for the first time to examine the migration behaviours of cationic and nonionic imidazoline corrosion inhibitors in concrete. Imidazoline can react with bromocresol purple resulting in a reduction in absorbance, which can be used to calculate quantitatively imidazoline concentration. The results showed that the migration rate of nonionic imidazoline was faster than that of cationic imidazoline with or without the presence of an electric field, possibly because of the better water solubility of nonionic imidazoline. The electric field could significantly accelerate the migration rate of the cationic and nonionic imidazoline. However, the penetration performance of nonionic imidazoline was much improved compared with that of cationic imidazoline in concrete. From X‐ray photoelectron spectroscopy analysis, the N element could be detected on steel, verifying the migration behaviour of the nonionic imidazoline. This nonionic imidazoline could markedly retard steel corrosion according to potentiodynamic polarization.

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“…Works have been reported e.g. on organic inhibitor injections [5] nanosilica or nanoalumina injections with electromigration method [6][7][8][9]. The repair of distressed concrete is often accompanied with chloride extraction [10] that can be done independently or simultaneously with NP treatment.…”

Section: Introductionmentioning

confidence: 99%

Nanoparticles in Concrete: Application in Fresh and Hardened State

Němeček

Šulc

Němečková

et al. 2018

KEM

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The paper summarizes utilization of nanoparticles (NP) in concrete for enhancing its mechanical, transport or other properties. The first part is devoted to review of NPs used in fresh concrete mixtures that have been reported previously in the literature while the second part shows original results from utilization of nanoparticles as healing agents for reparing of existing concrete structures. In the second case, nanoparticles are delivered to concrete via electrokinetic principle by using their surface charge provided in colloidal solutions. Particles are transported in the pore liquid of concrete due to electric field applied between the concrete surface and steel reinforcement. In this way, distressed concrete can be repaired, cracks sealed and risk of corrosion diminished. The injection of NPs can be complemented with extraction of chlorides that are the main deteriorating chemicals in reinforced concrete structures. Finally, the paper shows a framework developed for the electrokinetic transport of ionic species in concrete applied to chloride extraction from concrete and how it can be modified also for transport of nanoparticles.

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Modification of properties of reinforced concrete through nanoalumina electrokinetic treatment

Cited by 13 publications

References 21 publications

Electrokinetics Application in Concrete and Well Construction

Electrokinetics Application in Concrete and Well Construction

Study of the migration behaviours of imidazoline corrosion inhibitor in concrete using UV–vis spectrophotometry

Nanoparticles in Concrete: Application in Fresh and Hardened State

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