Thayer Salem Arabiyat2022-05-182022-05-184862https://drepo.sdl.edu.sa/handle/20.500.14154/2766The study reports the results of an extensive laboratory investigation designed to evaluate the engineering properties of asphalt emulsion treated marl (AETM) with a view to determining its adequacy for use in road bases. Based on the experimental results and the elastic analysis of multi-layered pavement system, thickness design charts for AETM base courses have been evolved. The study is broadly divided into three phases. Phase I described in chapter 2, deals with the mix design procedure by which the optimum proportioning for AETM was determined. Marl was blended with 30% wind blown sand to improve its gradation. Portland cement, upto 5% by weight, was also added as a stabilizer to improve the strength characteristics. Illinois method, which makes use of Marshall equipment, was cmployed for the mix design. Optimum asphalt emulsion content of 14%, yielding residual asphalt cement of 8.2% was arrived at which was found to satisfy the mix design criteria. Phase II, described in Chapters 3 and 4, deals with advanced characterization tests to predict the behavior of AETM under inservice conditions. AETM with 2% and 5enThesis