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Author:

Li, Yue (Li, Yue.) | Lin, Hui (Lin, Hui.)

Indexed by:

Scopus SCIE

Abstract:

This paper adopts magnesium phosphate cement (MPC) bonding carbon fiber reinforced plastics (CFRP) as anode and mainly studies the influences of electrochemical chloride extraction (ECE) on the ions distribution, mechanical properties and pore structure of reinforced concrete under varying current densities and temperatures. Results show that the ECE efficiency is mainly affected by the factor of current density. ECE results in the re-distribution of ions in concrete. The increase in current density results in an obvious reduction of Cl- and the increases of OH-, K+, Na+ and Ca/Si ratio in the regions nearby rebar. Meanwhile, from rebar surface to concrete surface, Cl- shows an increasing trend and OH-, K+, Na+ and Ca/Si ratio present a decreasing trend. ECE treatment can significantly reduce the corrosion risk of rebar by the excellent Cl- removal efficiency. However, the decrease in small pore and the increase in large pore result in the deterioration of concrete mechanical properties after ECE treatment. Comprehensively consider the influences of ECE on chloride removal efficiency, bonding strength retention and compressive strength retention by using efficacy coefficient analysis, the optimal current density and temperature for ECE are 2A/m(2) and 35 degrees C.

Keyword:

Magnesium Phosphate Cement Corrosion risk Electrochemical Chloride Extraction

Author Community:

  • [ 1 ] [Li, Yue]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, MOE, Beijing 100124, Peoples R China
  • [ 2 ] [Lin, Hui]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, MOE, Beijing 100124, Peoples R China

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Source :

INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE

ISSN: 1452-3981

Year: 2022

Issue: 8

Volume: 17

1 . 5

JCR@2022

1 . 5 0 0

JCR@2022

ESI Discipline: CHEMISTRY;

ESI HC Threshold:53

JCR Journal Grade:4

CAS Journal Grade:4

Cited Count:

WoS CC Cited Count: 0

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 1

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