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Evaluating the surface free energy and moisture susceptibility of modified asphalt mixtures with nano hydrated lime under saturated conditions with deicer materials and distilled water
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Author : Hamid Behbahani*a, Gholam Hossein Hamedi b and Vahid Najafi Moghaddam Gilani a
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ABSTRACT
Pavement freezing in the snow and frost season has been causing a lot of trouble for road travelers every year in many countries. One of the strategies for winter maintenance of roads is the use of deicer materials that have been studied by many researchers for their effective factors. In this study, the effect of additives used as asphalt binder modifier on the moisture susceptibility of hot mix asphalt (HMA) under saturated conditions with deicing materials has been investigated. In order to evaluate the moisture susceptibility caused by deicing materials including sodium chloride (NaCl), calcium magnesium acetate (CMA), calcium formate (CaF) and potassium chloride (KCl) in addition to distilled water (DW), indirect tensile strength (ITS) test and the surface free energy (SFE) method have been used. The results show that the use of nano hydrated lime (NHL) increases the ITS and tensile strength ratio (TSR) values of samples saturated with deicing materials.
KEYWORD
Deicing materials, indirect tensile strength, surface free energy, asphalt binder modifier, moisture susceptibility