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Title:

Evaluation of Resilient Moduli for Recycled Crushed-Rock-Soil Mixtures Using Nonlinear Dynamic Properties

Accession Number:

01333124

Record Type:

Component

Abstract:

The objective of the paper is to develop a resilient modulus (ER) prediction model for the compaction fills of recycled crushed-rock-soil-mixtures. The evaluation of ER, using the “orthodox” repeated loading triaxial test, is not even imaginable for such a large-size gravelly material. The realistic alternative is to utilize the well-developed techniques which are currently used for measurements of subtle different modulus, such as shear modulus (G). The prediction model was developed by: (1) adopting the modified hyperbolic model of shear modulus curve, and (2) determining the model parameters (AE, nE, εr and a) from in-situ measured Gmax and the reduction curves of modeled materials using the large-scale free-free resonant column tests. The values of AE increase from 8731 to 13135 as the overall grain distribution (represented by Dmax, D50 and Cu) varies. The values of nE fall in the range from 0.35 to 0.47 and turn out to be not much affected by D50 in general. For determination of the model parameters εr and a, the modeled materials were reconstructed by shifting the typical gradation curve of the original material. The effect of confining pressure on the parameters is minimal and in turn the parameters were evaluated from the mean curve. Also the effect of grain size turns out to be insignificant as long as Cu maintains in the gradation shifting. The values of εr and a proposed are 0.0135 and 0.80, respectively for the typical crushed-rock-soil-mixtures. It should be noted that, if the gradation curve widely stretched including quite an amount of fines, scalped specimens may be used to evaluate the model parameters of such a “dirty” material.

Monograph Accession #:

01329018

Report/Paper Numbers:

11-2249

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Mok, Young-Jin
Park, In-Beom
Park, Chul-Soo

Pagination:

15p

Publication Date:

2011

Conference:

Transportation Research Board 90th Annual Meeting

Location: Washington DC, United States
Date: 2011-1-23 to 2011-1-27
Sponsors: Transportation Research Board

Media Type:

DVD

Features:

Figures (8) ; References (15) ; Tables (1)

Uncontrolled Terms:

Soil mixing

Subject Areas:

Highways; Materials; Pavements; I33: Other Materials used in Pavement Layers

Source Data:

Transportation Research Board Annual Meeting 2011 Paper #11-2249

Files:

TRIS, TRB

Created Date:

Feb 17 2011 6:06PM