SYMPOSIA PAPER Published: 01 January 1980
STP36081S

Improving the Durability of Concrete to Freezing and Deicing Salts

Source

The resistance of concrete to freezing and deicing salts depends mainly on the durability of its outermost zones. The material properties of these outermost zones appear to be rather inhomogeneous. Thus, variability of material properties is inevitable in these zones. In addition, external influences may cause other inhomogeneities in the concrete, for example, gradients of water saturation, salt concentration, or temperature. Thermal gradients, especially those created by the temperature shock during the process of ice melting by means of deicing salts, can cause the development of internal stresses in the concrete. An estimation of the internal tensile stresses is determined on the basis of temperature shock experiments; they may reach the order of magnitude of the tensile strength of concrete under unfavorable circumstances (thickness of ice 0,5 mm and more; high salt concentration).

Author Information

Rösli, A
Institute for Building Materials, Materials Chemistry and Corrosion, Swiss Institute of Technology, Zürich, Switzerland
Harnik, AB
Institute for Building Materials, Materials Chemistry and Corrosion, Swiss Institute of Technology, Zürich, Switzerland
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Details
Developed by Committee: E06
Pages: 464–473
DOI: 10.1520/STP36081S
ISBN-EB: 978-0-8031-4768-3
ISBN-13: 978-0-8031-0325-2