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Electric-arc-furnace (EAF) slag - Oxidizing slag

  1. According to Appendix No. 8, regulations for electric-arc-furnace (EAF) slag under the “Management Guideline for the Reuse of Industrial Waste”, processed oxidizing slag may be reused in cement raw materials, asphalt concrete aggregates, asphalt concrete, Controlled-Low-Strength-Material (CLSM) aggregates, CLSMs, subbase and base course grade aggregates for pavement constructions (roads, sidewalks, container yards or parking lots), Jersey barrier.
  2. Depending on the application, the product quality of the EAF slag aggregate products shall meet the requirements of the Chinese National Standards of “CNS 15305 Materials for soil-aggregate subbase, base, and surface courses” and “CNS 1240 Concrete aggregates”.
  3. Product quality (CLSM aggregate):
Test items Test value

Normative value

 Test method
Set 1 Set 2
Percentage passing sieve analysis 25.0mm 1” 100.0 100.0 100.0 CNS486(2001)
19.0mm 3/4” 100.0 100.0 100.0
12.5mm 1/2” 94.1 94.9 90-100
9.5mm 3/8” 68.6 69.1 40-70
4.75mm #4 10.8 9.2 0-15
2.36mm #8 4.1 3.6 0-5
Material content (%) finer than 75µn within the aggregate 0.6 0.7 ≤1.0 CNS491(2001)
Content (%) of clay lumps and friable particles within the aggregate 0.18 0.16 ≤3 CNS1171(1995)
Content (%) of lightweight aggregate within the aggregate 0.37 0.39 ≤1.0 CNS10990(1998)
Coarse aggregate Los Angeles Abrasion Test (%) 17.9 17.5 ≤50 CNS490(2009)

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