Validating Field Employed X-Ray Fluorescence (XRF) on Stabilized Subgrade Projects to Assess Impact of Extreme Precipitation Events, Improve Construction Quality Control and Facilitate Geotechnical Forensic Investigations

Cerato, Amy B.; Miller, Gerald A.; Ferraro, Nathan; Collins, Rodney; Southern Plains Transportation Center; University of Oklahoma

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Validating Field Employed X-Ray Fluorescence (XRF) on Stabilized Subgrade Projects to Assess Impact of Extreme Precipitation Events, Improve Construction Quality Control and Facilitate Geotechnical Forensic Investigations

2017-03-17
By Cerato, Amy B. ; Miller, Gerald A. ; Ferraro, Nathan ; ...

[PDF-811.39 KB]

English

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Creators:

Cerato, Amy B. ; Miller, Gerald A. ; Ferraro, Nathan ; Collins, Rodney

Cerato, Amy B. ; Miller, Gerald A. ; Ferraro, Nathan ; Collins, Rodney Less -
Corporate Creators:

Southern Plains Transportation Center ; University of Oklahoma

Southern Plains Transportation Center ; University of Oklahoma Less -
Subject/TRT Terms:

[+]

Calcium Oxide Construction Forensic Engineering Geotechnical Engineering Geotechnology Highways I30: Materials Portable Equipment Quality Control Soil Stabilization Subgrade (Pavements) Subgrade Materials X Ray Fluorescence
Publication/ Report Number:

SPTC14.2-02-F
Resource Type:

Tech Report
Geographical Coverage:

United States ; Oklahoma

United States ; Oklahoma Less -
Edition:

Final Report
Corporate Publisher:

Southern Plains Transportation Center
Abstract:

The goal of this research project was to assist the state in improving stabilized subgrade behavior by providing a fast, easy-to-implement method of testing stabilizer content and distribution during construction, prior to pavement laying. In addition, this method provides a tool for forensic investigations, where the presence or lack of additive in a stabilized layer is in question. The objectives of the proposed research, which support the goal were to validate the portable field employed XRF (PHXRF) test on several roadway stabilization projects to assess the depth and spatial heterogeneity of the stabilization across a site as well as the impact of extreme precipitation events on stabilized subgrade strength. This information can be used to make recommendations to transportation officials on how to employ PHXRF and implement a laboratory XRF testing protocol on job-sites for quality control applications or during forensic investigations. There is a need for this tool as currently there are no simple and accurate methods for making discrete measurements of field additive contents. Results of this research indicate the PHXRF, using the proper sampling and testing protocols, can provide an excellent assessment of the spatial distribution of a soil additive. However, the results also highlight the importance of acquiring adequate samples of the virgin soil, chemical additive, and mixed soil, to properly characterize the additive content distribution in the subgrade.
Format:

PDF
Funding:

DTRT13-G-UTC36, SPTC 14.2-02
Collection(s):

US Transportation Collection
Main Document Checksum:

[+]

urn:sha256:688985463f76f974758231cc475cb1ff2480f1b5dc4ab2926d3935730a6a5b4d
Download URL:

https://rosap.ntl.bts.gov/view/dot/36989/dot_36989_DS1.pdf
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Validating Field Employed X-Ray Fluorescence (XRF) on Stabilized Subgrade Projects to Assess Impact of Extreme Precipitation Events, Improve Construction Quality Control and Facilitate Geotechnical Forensic Investigations

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