TY - JOUR
T1 - Concrete after 30 years of exposure - Part II
T2 - Chloride ingress and corrosion of steel bars
AU - Mohammed, Tarek Uddin
AU - Hamada, Hidenori
AU - Yamaji, Toru
N1 - Funding Information:
The authors express their gratitude to José María la Calle, former Deputy General Director of Architecture and Urban Planning of the Community of Madrid, and José María Cabrera, managing director of the extinct Conservación del Patrimonio Artístico Company (CPA, S.A.). Technicians Marián Barajas, Iván Serrano, Xavier Arroyo, Eugenio Baldonedo and Fernando Agua are gratefully acknowledged. The authors would also like to thank the information given by Fernando de Castro López-Villarino, Antonio Perla and Andrés Perea, and the images provided by the Specialized Documents Centre of Madrid Environmental Regional Department and the Historic Railway Archive from the Railway Museum Madrid and Spanish Railways Foundation. This research was funded by Geomaterials 2 (S2013/MIT_2914) and Geomaterials (S2009/MAT_1629) Programmes, and by the Complutense University of Madrid’s research group Applied Petrology for Heritage Conservation (921349). Finally, comments of the anonymous reviewers are thanked, as a better conceptual understanding of the work has been achieved.
Funding Information:
The authors express their gratitude to Jos? Mar?a la Calle, former Deputy General Director of Architecture and Urban Planning of the Community of Madrid, and Jos? Mar?a Cabrera, managing director of the extinct Conservaci?n del Patrimonio Art?stico Company (CPA, S.A.). Technicians Mari?n Barajas, Iv?n Serrano,Xavier Arroyo, Eugenio Baldonedo and Fernando Agua are gratefully acknowledged. The authors would also like to thank the information given by Fernando de Castro L?pez-Villarino, Antonio Perla and Andr?s Perea, and the images provided by the Specialized Documents Centre of Madrid Environmental Regional Department and the Historic Railway Archive from the Railway Museum Madrid and Spanish Railways Foundation. This research was funded by Geomaterials 2 (S2013/MIT_2914)and Geomaterials (S2009/MAT_1629) Programmes, and by the Complutense University of Madrid?s research group Applied Petrology for Heritage Conservation (921349). Finally, comments of the anonymous reviewers are thanked, as a better conceptual understanding of the work has been achieved.
PY - 2004/1
Y1 - 2004/1
N2 - A detailed investigation on 30-year-old concrete specimens of 150 and 300 mm in diameter and height, respectively, made with ordinary Portland cement (OPC), high early-strength portland cement (HES), moderate heat portland cement (MH), Type B slag cement (SCB), and alumina cement (AL) was carried out. Three steel bars were embedded at cover depths of 20, 40, and 70 mm. Carbonation depth, water- and acid-soluble chloride contents, and electrochemical and physical evaluation of corrosion were evaluated. Chloride ingress in concrete was lower for slag and alumina cements compared with the others. More corrosion over the steel bars, however, was found for alumina cement due to the porous steel-concrete interface. The surface condition of the steel bars embedded in concrete made with slag cements remains the same as the initially polished condition. Using slag cement is concluded as one of the best choices to improve the long-term durability of marine concrete structures.
AB - A detailed investigation on 30-year-old concrete specimens of 150 and 300 mm in diameter and height, respectively, made with ordinary Portland cement (OPC), high early-strength portland cement (HES), moderate heat portland cement (MH), Type B slag cement (SCB), and alumina cement (AL) was carried out. Three steel bars were embedded at cover depths of 20, 40, and 70 mm. Carbonation depth, water- and acid-soluble chloride contents, and electrochemical and physical evaluation of corrosion were evaluated. Chloride ingress in concrete was lower for slag and alumina cements compared with the others. More corrosion over the steel bars, however, was found for alumina cement due to the porous steel-concrete interface. The surface condition of the steel bars embedded in concrete made with slag cements remains the same as the initially polished condition. Using slag cement is concluded as one of the best choices to improve the long-term durability of marine concrete structures.
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M3 - Article
AN - SCOPUS:3042628993
VL - 101
SP - 13
EP - 18
JO - ACI Materials Journal
JF - ACI Materials Journal
SN - 0889-325X
IS - 1
ER -
