Abstract
This paper first briefly overviews the production and use of iron and steel slag in Japan and the quality requirements for use in road construction imposed by the Japanese industrial standard, followed by an outline of the mainstream structural design method of asphalt pavement. Then, presented is the compaction properties and uniaxial compressive strength of hydraulic, graded iron and steel slag base-course material produced at five different manufacturers. Series of uniaxial compression tests were carried out on the specimens cured up to 730 days. As the results, it is shown that there are large variations in the density of solids and the compaction properties among those five base-course materials, that those five base-course materials show uniaxial compressive strength in a wide range for each curing time, that the way the uniaxial compressive strength increases with time differs among them, and so on. Its relationship with the resilient modulus for each of the five base-course materials is also referred.
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