In pavement design, the CBR and direct shear tests are two very common laboratory investigations for predicting the strength of a subgrade layer. The relationship between the CBR and water content has been commonly presented in analyses, with the result of the direct shear being expressed from the aspect of effective cohesion and the internal friction angle. Even though most natural soil is in...

subgrade soil stabilization is one of the primary and major processes in the construction of any highway; also environmental authorities are concerned about the growing amount of polyethylene (pet) bottles produced by household sectors. this research in order to study effect of adding recycled polyester fiber on soil engineering properties, especially shear strength and california bearing ratio...

Subgrade soil stabilization is one of the primary and major processes in the construction of any highway; also environmental authorities are concerned about the growing amount of polyethylene (PET) bottles produced by household sectors. This research in order to study effect of adding recycled polyester fiber on soil engineering properties, especially shear strength and California Bearing Ratio...

series of undrained monotonic triaxial tests and cone penetration tests were conducted on loose silty sand samples to study correlation between undrained shear strength of silty sands (sus) and piezocone test results. cpt tests were conducted at 27 silty sand samples in calibration chamber. the results indicate that, in low percent of silt (0-30%), as the silt content increases, the undrained s...

ABSTRACT: This study focuses on investigating the relationship between the bearing capacity of uniform sands and fractal dimensions calculated by different methods. California bearing ratio (CBR) tests are performed on 15 different soils to estimate the bearing capacities. A minimum number of 100 grains for each soil are investigated under a stereomicroscope. Applying the areaperimeter, line di...

the dynamic probe is an effective tool used in site investigation. it is more economic than the use of direct drilling, particularly in explorations with moderate depth. this paper presents an experimental study to investigate the capability of using dynamic probing to evaluate the shear strength and compaction percent of fine soil. a series of dynamic probe tests were carried out at 6 differen...

Sandy soil contains many geotechnical problems, including high permeability, less shear strength, sand dunes, and liquefaction. Therefore, it is necessary to stabilize the sandy improve its engineering properties, either through mechanical or chemical fixations. The one done by changing classification of mixing with other types soils additives in various gradients. While fixation related modifi...

In this study, CBR and Shear Vane tests, which are common test methods used in determining the bearing capacity shear strength of highway pavement subgrade material, were applied effect changing water content on results was investigated. It is aimed to determine accuracy these expressions by obtaining parameters material with different contents from laboratory experiments comparing obtained emp...