Abstract

This paper reports the results of experiments aiming to identify the properties of ferrochromium slag when it is used as an artificial aggregate for preparation of granular layers of flexible pavements. The experimental program consisted of three stages: (1) study of the physical and chemical properties of slag, (2) leaching of heavy elements of slag in terms of environmental impact, (3) study of the mechanical properties of specimens made with ferrochromium slag and limestone as aggregate. In the laboratory, cylindrically prepared specimens were tested in a repeated load triaxial (RLT) test apparatus. In addition, particle size analysis, abrasion, frost resistance, compaction, CA bearing ratio, and leaching tests were performed on the materials prior to RLT testing. The results indicate that the physical and mechanical properties of air-cooled ferrochromium slag are as good as those of natural aggregates. It can be used as a base or sub-base material in highway pavements and as an embankment material. Furthermore, the use of the slag as aggregate in pavement layers reduces the requirement for natural aggregates and saves the existing natural resources.

Issue Section:
Research Papers
Keywords:
highway pavements, ferrochromium slag, repeated load triaxial test, granular materials

References

1.
Yılmaz
,
A.
,
2008
, “
Use of Ferrochromium and Silico-Ferrochromium Slag and Silica Fume in Road Construction
,” Ph.D. thesis, Dept. of Civil Engineering,
Univ. of Suleyman Demirel
, Isparta.
2.
Zelic
,
J.
, “
Properties of Concrete Pavements Prepared with Ferrochromium Slag as Concrete Aggregate
,”
Cem. Concr. Res.
, Vol.
35
,
2005
, pp.
2340
–
2349
. https://doi.org/10.1016/j.cemconres.2004.11.019
Google Scholar
Crossref
Search ADS
 
3.
Lind
,
B. B.
,
Fallman
,
A. M.
, and
Larsson
,
L. B.
, “
Environmental Impact of Ferrochrome Slag in Road Construction
,”
Waste Manage.
, Vol.
21
,
2001
, pp.
255
–
264
. https://doi.org/10.1016/S0956-053X(00)00098-2
Google Scholar
Crossref
Search ADS
 
4.
Dawson
,
A. R.
,
Elliot
,
R. C.
,
Rowe
,
G. M.
, and
Williams
,
J.
, “
An Assessment of the Suitability of Some Industrial By-products for use in Pavement Bases in the United Kingdom
,”
Transp. Res. Rec.
, Vol.
1486
,
1995
, pp.
114
–
123
.
5.
Wu
,
S.
,
Xue
,
Y.
,
Ye
,
Q.
, and
Chen
,
Y.
, “
Utilization of Steel Slag as Aggregates for Stone Mastic Asphalt (SMA) Mixtures
,”
Build Environ.
, Vol.
42
,
2007
, pp.
2580
–
2585
. https://doi.org/10.1016/j.buildenv.2006.06.008
Google Scholar
Crossref
Search ADS
 
6.
Motz
,
H.
, and
Geiseler
,
J.
, “
Products of Steel Slags an Opportunity to Save Natural Resources
,”
Waste Manage.
, Vol.
21
,
2001
, pp.
285
–
293
. https://doi.org/10.1016/S0956-053X(00)00102-1
Google Scholar
Crossref
Search ADS
 
7.
U.S. EPA Method 1312
,
1986
(1994 update), “
The Synthetic Precipitation Leaching Procedure
” (SPLP), U.S. Environmental Protection Agency.
8.
General Directorate of Turkish Highways (GDTH)
,
1994
, “
Highway Construction Specifications
,” General Directorate of Highways Press Report No. 170/2, Ankara, Turkey.
9.
Senadheera
,
S.
, and
Nash
,
P.
,
1995
, “
Characterization of the Behavior of Granular Road Material Containing Glass Cullet
,” Dept. of Civil Engineering, Texas Tech Univ., Lubbock, TX, USA.
10.
AASHTO T294-94
,
1995
, “
Resilient Modulus of Unbound Granular Base/Subbase Materials and Subgrade Soils – SHRP, Protocol P46
,”
Standard Specifications for Transportation Materials and Methods of Sampling and Testing
, 17th ed., Washington, D.C.
11.
Zaman
,
M.
,
Chen
,
D.
, and
Laguros
,
J.
, “
Resilient Moduli of Granular Materials
,”
J Transp. Eng.
, Vol.
120
, No.
6
,
1994
, pp.
967
–
988
. https://doi.org/10.1061/(ASCE)0733-947X(1994)120:6(967)
Google Scholar
Crossref
Search ADS
 
12.
Boyce
,
J. R.
,
1976
, “
The Behaviour of a Granular Material under Repeated Loading
,” Ph.D. thesis,
Depart. of Civil Engineering, Univ. of Nottingham
.
13.
Pappin
,
J. W.
,
1979
, “
Characteristics of a Granular Material for Pavement Analysis
,” Ph.D. thesis,
Depart. of Civil Engineering, Univ. of Nottingham
.
14.
Karaşahin
,
M.
,
Dawson
,
A. R.
, and
Holden
,
J. T.
, “
Applicability of Resilient Constitutive Models of Granular Material for Unbound Base Layers
,”
Transp. Res. Rec.
, Vol.
1406
,
1993
, pp.
89
–
107
.
15.
Rada
,
G.
, and
Witczak
,
M. W.
, “
Comprehensive Evaluation of Laboratory Resilient Moduli Results for Granular Material
,”
Transp. Res. Rec.
, Vol.
810
,
1981
, pp.
23
–
33
.
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