Seismic Approach to Quality Management of HMA
MnDOT Contract No. 1034287
Federal Project Number: TPF-5 (341)
Execution: January, 2020 - December, 2021
PROJECT PROGRESS (July, 2020)
Summary

  • Field Data Sets from Newly Constructed Asphalt Road near Lund, Sweden (July 22, 2020)

    Field data sets acquired on July 22, 2020, on a newly constructed asphalt pavement near Lund, Sweden, are processed and evaluated
    for various purposes.  The data sets were collected by using the old system (“SYS-RYD-2019”).  The overall data quality is evaluated as
    “excellent” from raw field records and corresponding dispersion images that clearly show well-developed Lamb wave arrivals and the
    fundamental-mode anti-symmetric Lamb dispersion (A0), respectively. Below are one of the several hundred records obtained (> 500) in
    the field (left) and corresponding dispersion image and other spectral characteristics (right).  An approximate inversion results show
    velocity (Vs = 1400 m/), thickness (H = 0.1 m), and Poisson’s ratio (POS = 0.3) (bottom).  These are the results Norrfee Tech provided.

  • Further Testing of Air-Wave Alleviating Techniques

    Testing of various multichannel techniques previously tested/developed that can alleviate adverse influence of air waves on the target
    analyses (i.e., Lamb and Impact Echo analyses) are tested for ten (10) randomly selected records from the data set on July 22, 2020.
    Three previously developed techniques are tested that can alleviate the air-wave energy as much as possible without compromising
    other useful attributes of obtained wavefields [e.g., wavefields for Lamb and Impact Echo (IE) analyses].  They are surgical mute
    (MUTE), fk-filter (FK), and air-wave subtraction by using moving-window LMO stack (AIR-SUBTRACTED).  This report contains more
    details.   

  • Quality Control (QC) Parameters

    Testing of several quality control parameters for a particular type of wave (e.g., air or Lamb waves) such as overall amplitude (“Amp”),
    arrival time in ms [“msT0 (ms)”], velocity [e.g., “Vair (m/s)”], and peak frequency [“Fpeak (kHz)”] is performed by using the
    aforementioned ten (10) field record.  This report contains more details.  


    A project to build a C++ module to read the TDMS file of seismic data saved by the acquisition system being developed at Norrfee Tech
    was launched as of June, 2020.  The project will complete a separate C++ program that reads TDMS files and converts them into the
    ParkSEIS data format, which is the standard format for the software package being developed.  It seems necessary to use some library
    files provided by National Instrument (NI) for some functions to work properly within the C++ codes.  This project is about to finish.       

Project Tasks | Summary (see details)

    Task 1: Project Management and Administration
    Task 2: Hardware Development (Seismic Data Acquisition System) & Testing
    Task 3: Software Development & Testing
    Task 4: Delivery and Demonstration of Seismic Data Acquisition System and Software
    Task 5: Final Report

Year 1 (2020):

Year 2 (2021):
Progress Table (Prime Contractor - Park Seismic LLC) - July, 2020
Progress Table (Sub Contractor - Norrfee Tech) - July, 2020
Park Seismic LLC, Shelton, Connecticut, Tel: 347-860-1223, Fax: 203-513-2056, Email: contact@parkseismic.com
(One, #9, out of several hundread records collected)