This Paper describes a laboratory investigation of the influence of urea on the mechanical properties of concrete and the corrosion of the reinforcing steel. The mechanical properties of concrete cubes, exposed to weekly cycles of drying and submersion in a variety of urea or salt solutions, were investigated by non-destructive and destructive monitoring at regular intervals. The microstructure of concrete was analysed by means of mercury intrusion porosimetry. The resistance to freezing and thawing of concrete prisms was studied by recording weight loss, dynamic modulus of elasticity and ultrasonic pulse velocity. The effects of urea on reinforcement corrosion were investigated by monitoring changes in the corrosion potentials and corrosion rates of steel electrodes, embedded at four depths of cover in concrete slab specimens exposed to various methods of treatment with urea or salt solutions.
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September 1993
Research Article|
September 01 1993
Effects of urea on durability of reinforced concrete
M. Sadegzadeh;
Aston University, Transport Research Laboratory
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C. L. Page;
Aston University, Transport Research Laboratory
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P. R. W. Vassie
Aston University, Transport Research Laboratory
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*
Department of Civil Engineering, Aston University, Birmingham, B4 7ET. UK.
†
Transport Research Laboratory, Crowthorne, Berkshire, UK. Paper received 1 December 1992.
Publisher: Emerald Publishing
Online ISSN: 1751-763X
Print ISSN: 0024-9831
© 1993 Thomas Telford Ltd
1993
Magazine of Concrete Research (1993) 45 (164): 179–186.
Citation
Sadegzadeh M, Page CL, Vassie PRW (1993), "Effects of urea on durability of reinforced concrete". Magazine of Concrete Research, Vol. 45 No. 164 pp. 179–186, doi: https://doi.org/10.1680/macr.1993.45.164.179
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