1 2 Resilient modulus test is the recommended test to characterize subgrade soil for 3 pavement design in 1993 AASHTO pavement design guide as well as new proposed 4 Mechanistic-Empirical Pavement Design Guide (MEPDG). This test requires significant 5 resources including high level of technical capability to conduct. For smaller projects where 6 costly and complex resilient modulus testing is n...

in this study the performance of clay nano-particles on the soil reinforced with polypropylene fibers (pp-fiber) has been investigated. also a series of investigations concerning the effect of random orientation of fibers on the engineering behaviour of soil were conducted. soil mixtures were modified with varying percentages of nanoclay and fibers. unconfined compressive strength (ucs), compac...

The subgrade layer is the lowest pavement layer, which carries loads transferred from upper layers. Different researchers have studied resilient modulus (Mr) of different soils for fine-grained and coarse-grained soil types. layer's response mechanism was found to be those fine coarse materials, it vital improving performance life constructed over it. parameters related that can affect include ...

Permeability is a very important engineering property of soils and finds utility in a number of soil engineering problems such as yield of wells and seepage through and below the earth structures. It controls the hydraulic stability of soil masses. The permeability of soils is also required in the design of filters required to prevent piping in hydraulic structures. However, the determination o...

this paper provides an overview on obtaining low-carbon ultra-fine grained dual-phase steels through rapid intercritical annealing of cold-rolled sheet as improved materials for automotive applications. a laboratory processing route was designed that involves cold-rolling of a tempered martensite structure followed by a second tempering step to produce a fine grained aggregate of ferrite and ca...

An intermediate-scale flow cell experiment was conducted to study the removal of a DNAPL mixture from a layered porous medium through soil vapor extraction (SVE) with moist and dry air. A dual-energy gamma radiation system was used at various times to non-intrusively determine fluid saturations. The mixture, which contained the volatile organic carbon tetrachloride, mimics the DNAPL disposed at...

This work investigates the influence of soil type on electrodialytic remediation (EDR) of lead (Pb). In electrokinetic soil remediation, it is well known that pH is a key factor and that carbonate influences remediation efficiency negatively. This work provides results from laboratory-scale EDR experiments with ten representative industrially Pb-contaminated surface soils. Results indicate that...

Several methodologies have been developed and used by researchers for measuring either total suction ψ (sum of matric suction ψm and osmotic suction ψo), or only ψm. While employing different methodologies for establishing the soil-water characteristic curve, SWCC, there is a possibility that the factors such as the type of the soil suction measured, measurement range, equilibration time, prese...

There are many empirical equations published for unsaturated fine-grained soils. However, there is only one equation established silty sand using the shear-box test and filter-paper-based suction test, but with range of 0 to 200 kPa. It reported that a significant discrepancy between predicted values results apparent cohesion within 100 kPa coarse-grained The purpose this research study effect ...