Spray lance heigh direct impact slag splashing effect during slag splashing in AOD, the spot which is corroded seriously could be recoveried effectively by adjusting the spray lance height.

The comprehensive study on the impact and mechanism of mineral fillers, as fly-ash, Portland cement, slag-powder, hydrated lime and so on, improved asphalt concrete stability is scarce.

The impact on the pozzolanic effect by the fineness of superfine slag powder is changed with content.