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doi:10.3850/978-981-08-7920-4_S3-M037-cd
Mechanical Characteristics of Asphalt Concrete with Steel Slag Aggregates
Wei Li1, Liye Wang1, Yan Liang1 and Haruyuki Yamamoto2
1School of Civil Enginerring, ShenYang Jianzhu University, ShenYang, China.
2Development Technology, Hiroshima University/IDEC, Hiroshima, Japan.
ABSTRACT
Due to its cementitious property of steel slag, we bring out an idea of using steel slag fines to
improve the bearing capacity of soft ground, and steel slag particle as aggregates in asphalt
pavement. For the cementitious property of steel slag, it has very good affinity with bitumen,
and not need any addition such as Portland cement or hydrated lime to improve the adhesion
of the bitumen to the aggregates. To investigate the validity of steel slag as aggregates in road
surface dressing, a series of tests for asphalt concrete mixed with asphalt cement and steel slag
aggregates particles are performed using marshall method. The test results showthat the asphalt
concrete mixed with asphalt cement and steel slag aggregates have very large stiffness, high
resistance to deformation and high resistance to cracking. Based on these studies, combining
with the utilities of steel slag in soil improvement and in road surface dressing, not only save
the resources andmaintains the natural environment, but also bring remarkable economic effect.
Moreover, in this paper, the authors aim at using steel slag in soil improvement, subgrade and
surface dressing. Because there are very good affinities among these layers, the road structures
can be integrated as a one, so the asphalt pavement can not be easily distressed.
Keywords: Steel slag, Road engineering, Asphalt concrete, Marshall test, Soil improvement, Affinity, Stability, Split tensile strength.
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