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Reductive slag

Electric-arc-furnace (EAF) slag - Reducing 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 reducing 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, non-structural pre-mixed concrete aggregates, non-structural pre-mixed concrete, cement product aggregates, or material for concrete products (concrete bricks, hollow bricks, cement roof tiles, cement slabs, curbs, concrete pipes, manholes, gutter covers).
  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 (Concrete aggregate, CLSM aggregate):
Test items Test value

Normative value

 Test method
Set 1 Set 2
Percentage passing
sieve analysis		 9.5mm 3/8” 100.0 100.0 100 CNS486(2001)
4.75mm #4 97.4 97.9 95~100
2.36mm #8 83.9 84.8 80~100
1.18mm #16 57.9 59.7 50~85
0.600mm #30 33.9 35.6 25~60
0.300mm #50 16.8 18.1 5~30
0.150mm #100 9.1 8.7 0~10
FM 3.01 2.95 2.3~3.1
Material content (%) finer than 75µn within the aggregate 4.3 4.1 ≤5.0 CNS491(2001)
Content (%) of clay lumps and friable particles within the aggregate 0.15 0.19 ≤3 CNS1171(1995)
Content (%) of lightweight aggregate within the aggregate 0.71 0.74 ≤1.0 CNS10990(1998)
Organic content (%) in fine aggregate Does not include organic content Does not include organic content Does not include organic content CNS1164(2015)
Chloride ion content (%) in fine aggregate 0.0084 0.0083 ≤0.012 CNS13407(2015)
Soundness test loss rate (%) sodium sulfate solution in 5 cycles 1.9 1.9 ≤10 CNS1167(1995)

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