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Title:

An Improved NWD Model to Consider Pavement Drainage Effects in Concrete Pavement Performance

Accession Number:

01624622

Record Type:

Component

Abstract:

Even though the effects due to the presence of moisture within a pavement structure are a key contributor to pavement distress such as erosion it wasn’t until recent versions of the Mechanistic-Empirical Pavement Design Guide (MEPDG) that its effect was beginning to be represented in an actual design process. In this design method, the determination of the amount of damage incurred over a design period has a relationship with the number of wet days (NWD) or the number of days the interface between the slab and the base layer is wet as a user input in the design process. However, ongoing research at Texas A&M University on the factors affecting erosion development has led to the formulation of an improved infiltration model to facilitate the role of NWD via a model that is also reported herein as a function of the condition of the joint sealant and the permeability of the subbase layer as key factors. Using both field data, an improved approach to determine the NWD at the slab/subbase interface was formulated. This model plus factors such as erosion resistance of materials, climatic conditions, traffic loading, and pavement configuration are also included and demonstrated in an included example of erosion/faulting model. A valuable outcome of this study is the demonstration mechanistically of the role of these factors plus the NWD on service life of jointed concrete pavement. It is shown that limiting water infiltration into the pavement sublayers, can greatly improve concrete pavement performance, with respect to drainage.

Supplemental Notes:

This paper was sponsored by TRB committee AFS60 Standing Committee on Subsurface Drainage.

Monograph Accession #:

01618707

Report/Paper Numbers:

17-03481

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Neshvadian, Keivan
Zollinger, Dan G

Pagination:

14p

Publication Date:

2017

Conference:

Transportation Research Board 96th Annual Meeting

Location: Washington DC, United States
Date: 2017-1-8 to 2017-1-12
Sponsors: Transportation Research Board

Media Type:

Digital/other

Features:

Figures; References; Tables

Subject Areas:

Highways; Pavements

Source Data:

Transportation Research Board Annual Meeting 2017 Paper #17-03481

Files:

TRIS, TRB, ATRI

Created Date:

Dec 8 2016 11:19AM