Analysis of time domain reflectometry data from LTPP seasonal monitoring program test sections

Jiang, Y. J.; Tayabji, S. D.; ERES Consultants, Inc.; Turner-Fairbank Highway Research Center

Advanced Search

Select up to three search categories and corresponding keywords using the fields to the right. Refer to the Help section for more detailed instructions.

Search our Collections & Repository

Advanced Search
Custom Query

All these words:

For very narrow results

This exact word or phrase:

When looking for a specific result

Any of these words:

Best used for discovery & interchangable words

None of these words:

Recommended to be used in conjunction with other fields

Language:

Dates

Publication Date Range:

to

Document Data

Title:

Document Type:

Library

Collection:

Series:

People

Author:

Clear All

Query Builder

Query box

Clear All

For additional assistance using the Custom Query please check out our Help Page

i

Analysis of time domain reflectometry data from LTPP seasonal monitoring program test sections

1999-07-01
By Jiang, Y. J. ; Tayabji, S. D.

[PDF-8.46 MB]

Select the Download button to view the document

This document is over 5mb in size and cannot be previewed

English

Details You May Also Like

Details:

Creators:

Jiang, Y. J. ; Tayabji, S. D.

Jiang, Y. J. ; Tayabji, S. D. Less -
Corporate Creators:

ERES Consultants, Inc. ; Turner-Fairbank Highway Research Center

ERES Consultants, Inc. ; Turner-Fairbank Highway Research Center Less -
Subject/TRT Terms:

[+]

Algorithms Asphalt Pavements Computer Applications Concrete Pavements Fault Monitoring Flexible Pavements Pavement Bases Pavement Maintenance Pavement Performance Reflectometers Seasons Soil Properties Soil Water Subgrades Time Domain Analysis
Publication/ Report Number:

FHWA-RD-99-115
Resource Type:

Tech Report
OCLC Number:

41881000
Edition:

Final report. Aug 1997 to Jul 1998
Corporate Publisher:

Turner-Fairbank Highway Research Center
NTL Classification:

NTL-HIGHWAY/ROAD TRANSPORTATION-HIGHWAY/ROAD TRANSPORTATION;NTL-HIGHWAY/ROAD TRANSPORTATION-Materials;NTL-HIGHWAY/ROAD TRANSPORTATION-Pavement Management and Performance;
Abstract:

Time domain reflectometry (TDR) has become one of the most reliable methods for measuring in-situ soil moisture content. TDR sensors developed by the Federal Highway Administration (FHWA) are being used in the Long-Term Pavement Performance (LTPP) Seasonal monitoring zprogram (SMP) to monitor the in-situ moisture content at selected LTPP sites. The main goal of the study reported here was to develop procedures to produce good estimates of in-situ gravimetric moisture content. All the TDR traces in the LTPP database were processed using the approach described in this report. to estimate the in-situ gravimetric moisture content, methods were selected to interpret TDR traces. An algorithm and a computer program, Moister, were developed to implement these TDR interpretative methods. After that, the apparent length of the TDR trace and the dielectric constant of the unbound material were computed. Models were developed to relate dielectric constant with in-situ volumetric moisture content. Finally, gravimetric moisture content was computed using the volumetric content value and dry density of the soil. A diagnostic study of the conputed gravimetric moisture content was also conducted toi evaluate the reasonableness of the computed moisture contents. As part of the overall LTPP data analysis effort, it is expected that the information on the seasonal variation in the moisture content of the unbound base, subbase, and subgrade layers will be used to develop improved understanding of the seasonal variation in the load-carrying capaicty of pavements and the subsequent effect on pavement performance.
Format:

PDF
Funding:

DTFH61-96-C-00003
Collection(s):

Federal Highway Administration
Main Document Checksum:

[+]

urn:sha256:63a9979cf838f3d34cb5752f95a60e58f833dc01bb0ff42db21a0494f301ee99
Download URL:

https://rosap.ntl.bts.gov/view/dot/5432/dot_5432_DS1.pdf
File Type:

No Additional Files

More +

Analysis of time domain reflectometry data from LTPP seasonal monitoring program test sections

Details:

Supporting Files

You May Also Like