DefinePK

Abstract

Permeability is vital to every project where the flow of water through soil is a concern (e.g. dam seepage, cutoff wall and diaphragm wall). There are numerous studies about the vertical permeability of soil since ASTM D2434 Standard Test Method for Permeability of Granular Soils (Constant Head & Falling Head) is being followed. On the contrary, there are only a few studies that focused on the horizontal permeability of soils. Five (5) soil samples with different mixes of silty sand and fly ash were obtained for comparison. Rigorous laboratory tests were performed to determine the individual properties. Tests such as specific gravity tests, Atterberg limit tests (liquid limit, plastic limit and plasticity index), emax and emin test/relative density tests, particle size analyses, microscopic characterizations, elemental composition tests and permeability tests were performed to garner data that were utilized for the model. A new permeability set-up was used in the determination of the horizontal permeability. A relationship between the percentage of fly ash and the coefficient of permeability was established, the said relationship was utilized to develop a model that will predict the coefficient of permeability when the percentage of fly ash is available.