Browsing by Author "Getachew Adibaru"

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    Laboratory Performance Evaluation of Hydrated Lime Additives on Moisture Susceptibility of Water-Based Foamed Warm Mix Asphalt (WBFWMA) Mixtures
    (Addis Ababa University, 2025-03) Getachew Adibaru; Robeam Solomon (PhD)
    Warm mix asphalt (WMA) technology is recently developed and includes organic and chemical additives as well as water-based process (foaming effect), known for its environmental benefits, allows asphalt materials to be produced, placed and compacted at a relatively lower temperature than hot mix asphalt (HMA). This study evaluates the moisture sensitivity of water-based foamed warm mix asphalt (WBFWMA) by utilizing the hydrated lime additives as anti-stripping agent. The performance test was conducted with modified Lottman test for two nominal sizes of aggregate (20mm and 14mm). Statistical analysis using two-tailed t-test was also conducted to check the significance of the test result. The test result indicates that WBFWMA is more sensitive to moisture induced damage than HMA. However, the ITS value for lime-modified WBFWMA is comparable to HMA, revealing that it provides similar performance along with added environmental and cost benefits. The result recommended the use of lime-modified WBFWMA for its environmental and safety advantages.