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Open AccessArticle

Impact of Temperature Changes and Freeze—Thaw Cycles on the Behaviour of Asphalt Concrete Submerged in Water with Sodium Chloride

1
GCS Research Group, Civil Engineering School, Universidad de Cantabria, 39005 Santander, Spain
2
Construction and Agronomy Department, University of Salamanca, 49022 Zamora, Spain
*
Author to whom correspondence should be addressed.
Appl. Sci. 2020, 10(4), 1241; https://doi.org/10.3390/app10041241
Received: 21 January 2020 / Revised: 5 February 2020 / Accepted: 9 February 2020 / Published: 12 February 2020
(This article belongs to the Special Issue Green Concrete for a Better Sustainable Environment)
One of the main applications of salt in civil engineering is its use as a de-icing agent on roads in cold areas. The purpose of this research is to find out the mechanical behaviour of an asphalt concrete when it is subjected to temperature changes and freeze–thaw cycles. These temperature interactions have been carried out for dry specimens, specimens submerged in distilled water and specimens submerged in salt water (5% of sodium chloride, NaCl). An AC16 Surf D bituminous mixture was evaluated under three types of temperature interaction: three reference series remained at a controlled temperature of 20 °C, another three series were subjected to five freeze–thaw cycles and the last three series have been subjected to one year outside in Santander (Spain). The mechanical behaviour of the mixture was determined by Indirect Tensile Strength Test (ITS), Water Sensitivity Test (ITSR) and Wheel Tracking Test, Dynamic Modulus Test and Fatigue Tests. The results of the tests show that, although the temperature changes have a negative effect on the mechanical properties, salt water protects the aggregate-binder adhesive, maintains the mechanical strength, increases the number of load cycles for any strain range and reduces the time that the mixture is in contact with frozen water. View Full-Text
Keywords: salt; NaCl; asphalt concrete; freeze–thaw cycles; winter road salt; NaCl; asphalt concrete; freeze–thaw cycles; winter road
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Vega-Zamanillo, Á.; Juli-Gándara, L.; Calzada-Pérez, M.Á.; Teijón-López-Zuazo, E. Impact of Temperature Changes and Freeze—Thaw Cycles on the Behaviour of Asphalt Concrete Submerged in Water with Sodium Chloride. Appl. Sci. 2020, 10, 1241.

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