United States Department of Transportation
i
Use of soil-steel slag-class-C fly ash mixtures in subgrade applications.
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2012-12-07
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[PDF-22.69 MB]
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Abstract:In Indiana, large quantities of recyclable
materials - such as steel slag, blast furnace
slag and fly ash - are generated each year as
by-products of various industries. Instead of
disposing these by-products into landfills,
we can recycle them into beneficial civil
engineering applications by replacing
traditional construction materials with these
industrial by-products. Replacing traditional
materials with these industrial by-products
may be a cost-effective alternative that can
help save natural resources and reduce the
costs associated with landfilling.
In this research study, the suitability of using
mixtures of steel slag and Class-C fly ash
and mixtures of steel and blast furnace slags
to replace lime in subgrade stabilization
applications was evaluated. Initially,
mixtures of steel slag and Class-C fly ash
were explored as a replacement for lime. In
situ soil collected from a proposed
implementation project was mixed with 10%
(by weight of soil) of steel slag and Class-C
fly ash mixtures. The following mixtures of
steel slag and Class-C fly ash were
considered in this study: 5% steel slag-5%
Class-C fly ash, 7% steel slag-3% Class-C
fly ash and 8% steel slag-2% Class-C fly ash
by weight of soil. Since the Class-C fly ash
used in this study is expensive, a 7% steel
slag-3% blast furnace slag mixture by weigh
of soil was also investigated for use as an
alternative mixture that could also be used
for soil stabilization.
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