A Review of Recent Work on Deicing Salt Damage to Concrete Pavements and its Mitigation

Author(s): Prannoy Suraneni, Chunyu Qiao, Vahid Azad, Yaghoob Farnam, Jonathan Monical, Erol Unal, Chiara Villani, Burkan Isgor and Jason Weiss
Paper category: Proceedings
Book title: Proceedings of the International Conference on Advances in Construction Materials and Systems, Vol. 1
Editor(s): Manu Santhanam, Ravindra Gettu, Radhakrishna G. Pillai, Sunitha K. Nayar
ISBN: 978-2-35158-193-3
e-ISBN: 978-2-35158-191-9
Publisher: RILEM Publications SARL
Publication year: 2017
Pages: 155-170
Total Pages: 16
Language : English

Abstract: Concrete pavements in cold regions in the United States have shown damage at joints. This damage has been attributed in part to a reaction between calcium hydroxide in the concrete and chloride-based deicing salts. This reaction leads to the formation of a phase known as calcium oxychloride. This study presents an overview of work from the last decade that has been performed to better understand this reaction (specifically, with calcium chloride) and to propose strategies to mitigate the damage that develops. Thermogravimetric analysis, volume change measurements, and low-temperature differential scanning calorimetry are used to quantify the amount of calcium oxychloride which forms, and the damage that occurs in pastes exposed to CaCl2 solutions. It is shown that the use of supplementary cementitious materials reduces the calcium oxychloride content and a reduction in the extent of the damage. Thermodynamic modeling is used to better explain the influence of various supplementary cementitious materials on the cement paste. Although this paper deals with pastes, the extension of such studies to mortars and concrete are described. Strategies to mitigate the damage are outlined. Finally, a short discussion of the interactions between other chloride-based salts and concrete is presented.

Online publication : 2017
Publication type : full_text
Public price (Euros) : 0.00