How do you find the resilient modulus of soil?
The resilient modulus can be expressed as ? ? = ? ? ? , ( 1 ) where ? is the applied stress and ? ? is the recoverable axial strain.
What is resilient modulus of subgrade?
The resilient modulus of subgrade is a design parameter of the pavement structure, which is significantly affected by the overlying load and traffic load. Firstly, the soil density of different layers of the subgrade structure is calculated by the degree of compaction of different subgrade layers.
What is resilient modulus of a granular material?
Resilient modulus (Mr) is an important property that controls the performance of pavement materials under dynamic wheel loads. Mr can be determined in the laboratory from repeated load triaxial tests and is defined as the ratio of the deviator stress to the recoverable strain after a number of load applications.
Which is the test that governs the resilient modulus of soil subgrade in flexible pavement design?
cyclic triaxial load test
3.2. ], Determining the Resilient Modulus of Soil and Aggregates Materials, in which is obtained from the axial deviator stress divided by the recoverable axial strain using a cyclic triaxial load test.
Which test is carried to determine the resilient modulus of a subgrade soil?
The resilient modulus of subgrade soil is usually conducted by laboratory repeated load triaxial (RLT) testing.
How do you find subgrade modulus?
What is modulus of subgrade reaction? Modulus of subgrade reaction is defined as the pressure per unit deformation of the subgrade at specific pressure or deformation. It is expressed as k=p/s. Here, k = modulus or coefficient of subgrade reaction; p = applied pressure and s = deformation of soil settlement.
What is a resilient modulus?
The resilient modulus is defined as the ratio of the applied cyclic stress to the recoverable (elastic) strain after many cycles of repeated loading (Figure 5-14) and thus is a direct measure of stiffness for unbound materials in pavement systems.
Which test is carried out to determine the resilient modulus of a subgrade soil?
repeated load triaxial
The resilient modulus of subgrade soil is usually conducted by laboratory repeated load triaxial (RLT) testing.
Which test is carried out determine the resilient modulus of subgrade soil?
Which test is carried out to determine the modulus of subgrade soil?
The modulus of subgrade reaction is determined by the field plate load test. In this test, compressive stress is applied to the soil layer through rigid plates, and the deflections are measured for different values of stress.
What is modulus of subgrade reaction?
Modulus of subgrade reaction is the reaction pressure sustained by the soil sample under a rigid plate of standard diameter per unit settlement measured at a specified pressure or settlement.
What is currently testing the resilience of soils?
CHANGES IN THE AASHTO T-274 TEST PROCEDURE. The resilient modulus of soils and unbound granular mate- rials is commonly measured by using the AASHTO T-274.