A Comprehensive Calibration Strategy for Texas Department of Transportation Falling Weight Deflectometer Fleet

Rocha, S.; Nazarian, S.; Tandon, Vivek

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A Comprehensive Calibration Strategy for Texas Department of Transportation Falling Weight Deflectometer Fleet

2003-11-01
By Rocha, S. ; Nazarian, S. ; Tandon, Vivek

File Language:

English

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Creators:

Rocha, S. ; Nazarian, S. ; Tandon, Vivek
Corporate Creators:

University of Texas at El Paso. Center for Highway Materials Research
Corporate Contributors:

Texas Department of Transportation ; United States. Department of Transportation. Federal Highway Administration
Subject/TRT Terms:

Calibration Deflectometers Equipment Falling Weight Deflectometers Geophones Pavements Reliability Repeatability And Reproducibility Repeated Loads Test Procedures
Publication/ Report Number:

TX-01 1784-2
Resource Type:

Tech Report
Geographical Coverage:

Texas ; United States
Edition:

Interim Report: July 2001 -July, 2002
Corporate Publisher:

University of Texas at El Paso. Center for Highway Materials Research
Abstract:

The degree of accuracy with which the Falling Weight Deflectometer (FWD) data are collected and analyzed has a direct impact on the conclusions drawn in many aspects of TxDOT operation. Since TxDOT owns 15 FWD units, one of the largest FWD fleets of any single transportation agency in the world, high levels of repeatability and reproducibility are considered to be of major importance for an adequate interchangeability of the FWD fleet. As summarized in Research Report 1784-1, the existing calibration protocol improves the repeatability of each FWD but it does not address the reproducibility of the fleet. In this report a new calibration process has been recommended that seems to improve the reproducibility of the fleet. The calibration process consists of three steps: a routine and diagnostic maintenance, a simple calibration procedure followed by a comprehensive one if necessary.
Format:

PDF
Funding:

0-1784
Collection(s):

US Transportation Collection
Main Document Checksum:

urn:sha-512:7251056641743d64ac26dc2671a8300a7c953c40ff581c098ff5d406a15551b71244823246f57c9f540bc61b84b30d94670523ad2677aa7aa49c4923fef7beff
Download URL:

https://rosap.ntl.bts.gov/view/dot/85994/dot_85994_DS1.pdf
File Type:

[PDF - 23.66 MB ]

File Language:

English

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