The Effect of Moisture Damage on Cold Mix Asphalt Based on Emulsion Asphalt.

Abstract

Cold Mix Asphalt is an environmentally friendly material, but has lower strength, making it vulnerable to moisture-induced damage. Moisture infiltration reduces pavement strength and durability. The effect of immersion duration on moisture resistance in cold asphalt remains insufficiently explored. This study evaluates moisture damage on the surface course of cold asphalt mix with immersion durations of 1, 3, 5, and 7 days. Laboratory testing was conducted using Indirect Tensile Strength (ITS) and Unconfined Compressive Strength (UCS) methods. Results show that ITS and UCS values decrease with longer immersion, indicating reduced resistance to vertical loads and cracking. However, all values still meet the minimum standards for pavement design. The findings highlight the relationship between moisture exposure and structural degradation in cold asphalt. It is concluded that longer immersion increases the risk of moisture damage, which must be considered in material selection and design for sustainable pavement construction.