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Title:

Accelerated Method to Evaluate Performance of Slag Used as Unbound Material in Road Bases

Accession Number:

01474877

Record Type:

Component

Availability:

Transportation Research Board Business Office

500 Fifth Street, NW
Washington, DC 20001 United States

Abstract:

Because of environmental reasons, secondary materials will be and are being used on a large scale in road construction. Using these materials however is becoming a challenge because little information is available about their future behaviors and their performance is therefore difficult to estimate. In this study, aging is proposed as a means of exploring the long-term mechanical and physical performance of secondary materials. A slag mixture which is routinely used in the Netherlands in road (sub-)bases was selected as a reference material. The A32 motorway in the Netherlands was used as a source of field aged granulated Blast Furnace Slag (BFS) materials. The base layer of this motorway suddenly experienced serious failure after 20 years. In order to prevent similar problems to occur an aging method is suggested to detect at an early stage potential poor material performance. Three aging approaches including freeze-thaw (FT) action, steam aging and normal aging were chosen and applied to fresh and the field aged materials. These treatments have affected material characteristics. The results show that there is a linkage between secondary material performance and temperature, moisture and time. Response behavior for the steam aged laboratory samples and the A32 base material are similar, suggesting that the steam aging method did a reasonable job of producing a material of similar distress. The microstructural analysis suggests that it is possible to trace the chemical components which may attribute to the failure process of slag materials.

Supplemental Notes:

This paper was sponsored by TRB committee AFP70 Mineral Aggregates.

Monograph Accession #:

01470560

Report/Paper Numbers:

13-0804
13-0804

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Akbarnejad, Sadegh
Houben, Lambert
Molenaar, André

Pagination:

14p

Publication Date:

2013

Conference:

Transportation Research Board 92nd Annual Meeting

Location: Washington DC, United States
Date: 2013-1-13 to 2013-1-17
Sponsors: Transportation Research Board

Media Type:

Digital/other

Features:

Figures; Photos; References

Subject Areas:

Highways; Materials; Pavements; I22: Design of Pavements, Railways and Guideways; I33: Other Materials used in Pavement Layers

Source Data:

Transportation Research Board Annual Meeting 2013 Paper #13-0804

Files:

TRIS, TRB, ATRI

Created Date:

Feb 5 2013 12:16PM