Resilient modulus of the layers is a key engineering property which is used in the design of the new pavement, as well as, while evaluating the existing pavement for possible rehabili-tation. These are based on IRC 37:2018 and IRC 115:2015 in India. As per IRC guidelines, the resilient modulus of the subgrade is evaluated using an empirical correlation with its CBR value, and for the base course, it uses an empirical re-lationship with the thickness of the granular layer and the resilient modulus of the subgrade. According to global prac-tice, this is a Level-2 design approach. Level-1 approach considers the resilient modulus based on the laboratory test for analysis. At present, the quality control during the con-struction stage is based on the examination of the density of a layer. In the absence of any standard relationship between density and resilient modulus, this approach does not guar-antee that the layer modulus is achieved. If this is done at this stage, then it will allow the engineer to take corrective measures at that time itself thus ensuring the functionality during design life. This paper attempts to use FWD-based analysis for subgrade and granular layer for proposing its possible use for construction stage quality assurance. The re-sults look promising and indicate that use of FWD is possi-ble with certain modifications in the loading mechanism.
Evaluation of Resilient Modulus of the Subgrade and Granular Layer—A FWD-Based Analysis
Lecture Notes in Civil Engineering
Conference of Transportation Research Group of India ; 2021 December 14, 2021 - December 17, 2021
Proceedings of the Sixth International Conference of Transportation Research Group of India ; Chapter : 1 ; 3-18
2022-09-19
16 pages
Article/Chapter (Book)
Electronic Resource
English
Part 3 -- Resilient Modulus - Weighting Factor for Seasonal Subgrade Resilient Modulus
Online Contents | 1998
|Transportation Research Record | 2006
|Weighting Factor for Seasonal Subgrade Resilient Modulus
Transportation Research Record | 1998
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