Pavements are made up of many materials. The qualities of the resulting pavement are determined by these materials, their related properties, and their interactions. As a result, knowing these materials, how well they are classified, and how they operate is critical to understanding pavement. The materials used in highway building are of particular interest to highway engineers. This necessitates not only a detailed knowledge of the soil and aggregate parameters that influence pavement stability and durability, as well as the binding elements that may be applied to improve these pavement characteristics. Soil is a mass or deposition of earth material that may be easily mined using heavy machinery in the field or decomposed by mild mechanical methods in the laboratory, generated organically from mineral weathering or decay of plants.
This research deals with the effect of moisture on the strength of soil. Six different soil samples are selected for the experimentation. These samples are classified in to various types. This classification was done based on sieve analysis, liquid limit, plastic limit, plastic index and plasticity chart. The samples were classified as ML, CL, SC and SM. The strength of soil is measured through its CBR value. The CBR value was calculated for unsoaked condition and soaked condition for 1, 2,3 and 4 days and these values were compared. The values of CBR show there is decrease in CBR for all the soil samples.
Ampadu, S.I.K. A (2007) “Laboratory Investigation into the Effect of Water Content on the CBR of a Subgrade soil”. In Physics, Proceedings of Experimental Unsaturated Soil Mechanics; Springer: Berlin/Heidelberg, Germany; Volume 112, pp. 137–144, doi:10.1007/3-540-69873-6_12.
Blazejcak, D.,Horn.R.,Pytka.J.(1995) “Soil tensile strength as affected by time, water content and bulk density”. Int.Agrophysics, 1995; pp179-188.
Cokca, E., Erol,O., Armangil. (2004), “Effects of compaction moisture content on the shear strength of an unsaturated clay”, Geotechnical and Geological Engineering 22, pp285-297.
Nugroho,S.A., Hendri,A., Ningsih,S.R.(2012), “Correlation between index properties and california bearing ratio test of pekanbaru soils with and without soaked.” Canadian Journal on Environmental, Construction and Civil Engineering Vol. 3, Indonesia.
Razouki,S.S., Al-Azawi,M.S.(2003) “Long – term soaking effect on strength and deformation characteristics of a gypsiferous subgrade soil”. Engineering Journal of the University of Qatar, Vol. 16, Iraq, pp49-60.
Singh,D., Reddy.,K.S, Yadu.L.(2011), “Moisture and Compaction Based Statistical Model for Estimating CBR of Fine-Grained Subgrade Soils.” International Journal of Earth Sciences and Engineering 100-103.
Cokca, E., Erol,O., Armangil. (2004), “Effects of compaction moisture content on the shear strength of an unsaturated clay”, Geotechnical and Geological Engineering22, p.p. 285-297.
Kim,Y.T., Shin.H.,Park.D.K .(2011), “Variation of shear strength of weathered granitesoil with water content”.pp253-258.