The effect of soaking period on CBR values

Abstract

The road is made up of several layers. Construction engineers study thoroughly each layer during road pavement. The sub-grade layer is carefully designed and calculated before adopting it as the bottom layer. The thickness of this layer depends on its CBR value. For our project, we will conduct the CBR test on the soil under two conditions: soaked and un-soaked. The soaking period is critical for the clays strength especially when subjected to a long-term flood or soaking. To understand the importance of the soaking process on the result of the CBR, we will try to perform CBR tests with different soaking periods. By analyzing the results, we can explain how and when the water can affect the strength of the sub-grade material.