Published: 2020-03-31

Effect of various de-icers containing chloride ions on scaling resistance and chloride penetration depth of highway concrete

Pavel Reiterman , Martin Keppert

Abstract

The use of chloride-based de-icers belongs to the most common road winter maintenance measures applied to prevent dangerous driving conditions. Chloride-based de-icers are the most frequently used worldwide. The essential difficulty with de-icers is their detrimental effect on concrete, other components of the road infrastructure and on vehicles. The interaction of various individual chloride salts with concrete is described in the paper; the experimental programme was focused on evaluation of the most frequently applied chloride-based de-icers in terms of damage to the air-entrained concrete used for highway construction. Three individual salts – NaCl, CaCl2, MgCl2 – and one blend (NaCl + CaCl2) were used. Their effect on concrete was investigated in terms of surface scaling during freezing-thawing cycles, residual mechanical properties and final ingress of chloride ions. Calcium chloride exhibited the most detrimental effect on the studied concrete.

Keywords:

chloride-based de-icers, chloride ingress, freezing-thawing, residual mechanical properties, wetting-drying cycles.

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Reiterman, P., & Keppert, M. (2020). Effect of various de-icers containing chloride ions on scaling resistance and chloride penetration depth of highway concrete. Roads and Bridges - Drogi I Mosty, 19(1), 51–64. https://doi.org/10.7409/rabdim.020.003

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