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Title: Application of gamma-ray radiography and gravimetric measurements after accelerated corrosion tests of steel embedded in mortar

The accelerated corrosion by the impressed current technique is widely used in studies of concrete durability since it has the advantage that tests can be carried out within reasonable periods of time. In the present work the relationship between the applied current density and the resulting damage on the reinforcing steel, by applying optical microscopy, scanning electron microscopy, gamma-ray radiography and gravimetric measurements, was studied by means of the implementation of accelerated corrosion tests on reinforced mortar. The results show that the efficiency of the applied current is between 1 and 77%, regardless of the applied current density, the water/cement ratio and the mortar cover depth of the specimens. The results show the applicability of the gamma-ray radiography technique to detect localized corrosion of steel rebars in laboratory specimens.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ; ;  [5]
  1. Comisión Nacional de Energía Atómica, Gerencia Materiales, Depto. Corrosión, Av. Gral. Paz 1499, 1650 San Martín, Buenos Aires (Argentina)
  2. (CONICET), Av. Rivadavia 1917, 1033 Buenos Aires (Argentina)
  3. (Argentina)
  4. Universidad Nacional de San Martín, Av. Gral. Paz 1499, 1650 San Martín, Buenos Aires (Argentina)
  5. Tomografía de Hormigón Armado S.A. (THASA), Reclus 2017, 1609 Boulogne, Buenos Aires (Argentina)
Publication Date:
OSTI Identifier:
22475514
Resource Type:
Journal Article
Resource Relation:
Journal Name: Cement and Concrete Research; Journal Volume: 74; Other Information: Copyright (c) 2015 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CEMENTS; CONCRETES; CORROSION; CURRENT DENSITY; ELECTROCHEMISTRY; GAMMA RADIOGRAPHY; HARDNESS; MORTARS; OPTICAL MICROSCOPY; REINFORCED MATERIALS; SCANNING ELECTRON MICROSCOPY; SERVICE LIFE; STEELS; THERMAL GRAVIMETRIC ANALYSIS; WEAR RESISTANCE