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Title:

Application of Steam Aging Method for Evaluation of Slag System as a Granular Material

Accession Number:

01474879

Record Type:

Component

Availability:

Transportation Research Board Business Office

500 Fifth Street, NW
Washington, DC 20001 United States

Abstract:

Long term performance of secondary materials is becoming a challenging aspect in road construction since due to their benefits they are being used on a large scale, but on the other hand their future behavior is difficult to estimate. Therefore, there is need for an accelerated test protocol that allows to estimate the potential loss of strength of such materials as well as their potential volumetric change. A research program was therefore carried out to investigate the effects of steam aging on the performance of slag mixtures. Different slag mixtures which are routinely used in the Netherlands in road (sub-)bases were selected. A motorway in the Netherlands was used as a source of field aged materials. The base layer of this motorway experienced serious failures. In order to prevent similar problems a steam aging method was suggested to detect at an early stage material with potential poor performance. The results showed that certain mixtures may expand during steam aging and the compressive strength of these mixtures increased during 7 days steam aging, afterwards it decreased. The microprobe technique was adopted to measure the corresponding chemical composition and monitor the micro-structural changes. It was found that the reactivity of slag materials is influenced by the chemical composition and the aging time. The measured data have indicated a relationship between some major chemical compositions and mechanical properties of the slags. Empirical equations were developed to estimate the influence of chemical composition on the compressive strength and volume expansion.

Supplemental Notes:

This paper was sponsored by TRB committee AFP70 Mineral Aggregates.

Monograph Accession #:

01470560

Report/Paper Numbers:

13-0808
13-0808

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; Tables

Subject Areas:

Highways; Pavements; I22: Design of Pavements, Railways and Guideways

Source Data:

Transportation Research Board Annual Meeting 2013 Paper #13-0808

Files:

TRIS, TRB, ATRI

Created Date:

Feb 5 2013 12:16PM