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Title:

Field Performance Evaluation of Quarry Byproducts Used in Unbound Aggregate Layers Constructed Over Soft Subgrade

Accession Number:

01657905

Record Type:

Component

Abstract:

With recent focus on sustainable construction practices and the scarcity of natural resources, the use of by-product materials such as quarry by-products (QB) is becoming imperative. QB pose an environmental and economic challenge as they accumulate in large quantities at stone quarries. Recent research at the Illinois Center for Transportation has evaluated new sustainable applications of QB in pavement construction. First, a laboratory packing study of QB with large-size aggregates, commonly used as rock fill over soft subgrade, was conducted in a large steel box with Plexiglas to determine optimum QB amount. Based on the findings, both construction platform and low volume road full scale test sections, utilizing QB packed into the voids of large-size aggregates, were constructed over a weak subgrade with an engineered strength of unsoaked California bearing ratio (CBR) less than 1%. Full scale test sections were also constructed with dense-graded base course aggregate materials containing up to 15% plastic and nonplastic fines (materials passing the No. 200 sieve) utilizing QB. Rutting performance of the constructed test sections were accomplished through accelerated pavement testing. The test sections containing large-size aggregates packed with QB proved to be quite successful when both one-lift and two-lift construction practices resulted in improved rutting trends over the use of large-size aggregates without QB. However, the test sections with dense-graded base course aggregate having 15% plastic fines accumulated the highest permanent deformation for both construction platform and low volume road applications.

Supplemental Notes:

This paper was sponsored by TRB committee AFP70 Standing Committee on Aggregates.

Report/Paper Numbers:

18-05170

Language:

English

Authors:

Qamhia, Issam
Tutumluer, Erol
Ozer, Hasan
Beshears, Sheila
Shoup, Heather
Kazmee, Hasan

Pagination:

6p

Publication Date:

2018

Conference:

Transportation Research Board 97th Annual Meeting

Location: Washington DC, United States
Date: 2018-1-7 to 2018-1-11
Sponsors: Transportation Research Board

Media Type:

Digital/other

Features:

Figures; References

Subject Areas:

Geotechnology; Highways; Materials; Pavements

Source Data:

Transportation Research Board Annual Meeting 2018 Paper #18-05170

Files:

TRIS, TRB, ATRI

Created Date:

Jan 8 2018 11:18AM