Investigation of material improvements to mitigate the abrasive wear mechanism of concrete crosstie rail seat deterioration (RSD).

Edwards, J. Riley; Lange, David A.; NEXTRANS Center (U.S.)

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Investigation of material improvements to mitigate the abrasive wear mechanism of concrete crosstie rail seat deterioration (RSD).

2014-11-01
By Edwards, J. Riley ; Lange, David A.

[PDF-709.70 KB]

English

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Details:

Creators:

Edwards, J. Riley ; Lange, David A.

Edwards, J. Riley ; Lange, David A. Less -
Corporate Creators:

NEXTRANS Center (U.S.)
Corporate Contributors:

United States. Dept. of Transportation. Research and Innovative Technology Administration
Subject/TRT Terms:

[+]

Abrasion Admixtures Concrete Ties Deterioration Fine Aggregates Mix Design Service Life Tie Pads
Publication/ Report Number:

NEXTRANS Project 0931Y04
Resource Type:

Tech Report
Geographical Coverage:

United States
Corporate Publisher:

NEXTRANS Center (U.S.)
Abstract:

To meet the increasingly stringent design and performance requirements due to increasing cumulative

gross tonnages from heavy-haul freight operations, along with increased high-speed inter-city passenger

rail development, improvements in concrete crosstie designs are needed. Rail Seat Deterioration (RSD)

continues to be identified as one of the primary factors limiting concrete crosstie service life in North

America. RSD refers to the degradation of material at the contact interface between the concrete

crosstie rail seat and the rail pad that protects the bearing area of the crosstie. Industry experts

consider abrasion to be a viable mechanism leading to RSD. A lack of understanding of the complex

interactions affecting the severity of abrasion has resulted in an iterative design process for concrete

crossties and fastening systems. The objective of this study is to quantify the abrasion performance of

rail seats by using a variety of concrete admixtures and materials. To simulate the abrasive wear

mechanism of RSD, a Small-Scale Abrasion Resistance Test (SSART) was designed by researchers at UIUC.

Additionally, a theoretical framework to model and predict abrasive wear was developed using

statistical techniques. Data obtained from the SSART and the statistical model will help the rail industry

mechanistically design concrete crossties by improving the current understanding of the performance of

concrete crosstie mix designs. Preliminary results show that the addition of metallic fine aggregates

(MFA), steel fibers, and the application of coatings improve the abrasion resistance of concrete

specimens
Format:

PDF
Funding:

DTRT07-G-005
Collection(s):

University Transportation Centers US Transportation Collection
Main Document Checksum:

[+]

urn:sha256:a3318715880b32a515f29f0aa6f1cb67c1867b1f896bf0978a158abe90f9cc26
Download URL:

https://rosap.ntl.bts.gov/view/dot/28198/dot_28198_DS1.pdf
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Investigation of material improvements to mitigate the abrasive wear mechanism of concrete crosstie rail seat deterioration (RSD).

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