Abstract
Damage caused by the moisture induction is one of the major causes of distress in hot mix asphalt (HMA), which affects the durability of asphalt pavement. Due to the presence of water, the bond between binder and aggregate becomes weak, resulting in stripping of the pavement. To reduce the probability of failure due to moisture, anti-stripping additives are added into the HMA mixtures. The present study investigates the use of waste lime sludge as an additive in HMA to assess the moisture susceptibility of the mixtures. The performance of HMA was evaluated by performing the retained Marshall stability ratio test, indirect tensile strength test and tensile strength ratio test. It was found that the lime sludge acts as an anti-stripping agent. The results indicate that the addition of lime sludge in the HMA effectively increases the resistance of these mixtures against the damage caused by moisture.
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