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Show SLAG PROPERTIES Table 2 shows the properties of the produced slag. G) Water-cooled slag forms fine amorphus particles. For this reason, the strength of water cooled slag is low, and can thus not be used as standard road crushed stone. Possible applications of this slag include use as backfilling soil for buried pipes. GD In rapidly -cooled slag (cooled at more than lO·e/min) a small amount of crystalization is observed through X-ray diffraction. aD X-ray diffraction results show that for slowlycooled slag (cooled at less than 5 t/min), a significant amount of crystalization occurs. In the future, secondary concrete products using slag, such as manhole walls will be manufactured on a trial basis for the further investigation of practical applications. Slowly-cooled slag has a strength equivalent to natural stone, and it is expected that this strength should not be significantly lowered when used as a concrete aggregate. Slowly-cooled slag has a wide variety of direct applications, and establishment of manufacturing techniques is therefore highly desired. Tobie 2 Slog Properties Sample Water- cooled Rapidly-cooled Slowly-cooled (tern Absolute dry weight 2.6-2.8 2.7- 2.8 3.1- 3.2 Water absorption (ey.) < 3 < 3 < 3 Wuneiitg vhot lupmere ( kg/£> 1.5-1.7 1.6- 1.8 1.9-2.0 Percentage of absolute(ey.) volume >55 >60 61-65 Washing loss (%) < 4 < 4 < 4 Abrasion loss (%) 30-50 15-40 15-20 -7- Standard value Crushed road stone Clas$ I t Class 2 ( Saturated ) surface-dry condition >2.45- <3 <35 <40 |