Effect of cyclic load on CBR of clayey soil

Abstract

The upper subgrade of many countries, especially Lebanon, is manly formed from a clayey soil. This kind of soil presents a weak CBR value when it is soaked. Scientists around the world always try to find a way to solve this problem, because it causes big troubles such as cracks and holes on highways. The normal CBR test is done by a continuous load which is not the same type of the traffic load which is a cyclic load. The main object of this project is to study the effect of a cyclic load on the CBR of a clayey soil. Three cycles are done on the soil for 0.1 and 0.2-inch penetration to have results that are more adequate. These results are linked to the soil properties using the identification test. The analysis shows that the cyclic load has a positive impact on the clayey CBR value which is almost increased after each cycle.