Design and preparation of steel slag SMA

Abstract

On the basis of the characteristics of high rigidity and excellent friction resistance, a new kind of steel slag SMA (stone matrix asphalt) concrete was designed and prepared. The main processes include aggregate gradation, performance analysis of steel slag before and after aging, preparation methods and properties test of steel slag SMA. The experimental results indicate that the index of steel slag's activation is less than 1 percent, the dynamic stability is 5699 times/mm, and both the residual stability and ratio of frozen splitting strength are more than 80 percent; the friction factor and structure depth are 67.1% and 0.7 mm respectively. These results show the steel slag SMA is superior to the common asphalt concrete and SMA that uses common aggregate.

Keywords

steel slag / SMA / design / preparation

References

[1] Lind B B, Larsson L B. Environmental Impact of Ferrochrome Slag in Road Construction. Waste Management, 2001, 21: 255-264.

[2] Shenli Yuan. The Use of Waste Basic Oxygen Furnace Slag and Hydrogen Peroxide to Degrade 4-Chlorophenol. Waste Mangement, 1999, 19: 495-502.

[3] Shuguang Hu. Research on Hydration of Steel Slag Cement Activated with Waterglass. J. of Wuhan Univ. of Tech.-Mater. Sci. Ed., 2001, 16(1): 37-40.

[4] Jianmin Song. Studies on Steel Slag Asphalt Mixture. China Civil Engineering, 2001, 4: 11-13.

[5] China's Professional Standard.Construction Technology Regulations of Asphalt Pavement. JTJ032-94, Beijing: Transportation Ministry of PR China

[6] China's Professional Standard.Aspgalt and Asphalt Mixture Test Regulations. JTJ052-2000, Beijing: Transportation Ministry of PR China

[7] Shaopeng Wu, Zhonghe Shui. An Improvement in Electrical Properties of Asphalt Concrete. J. of Wuhan Univ. of Tech-Mater. Sci. Ed., 2002, 17(4): 69-72.

[8] Qingjun Ding, Shuguang Hu. Study on Steel Slag Using in Pavement Projects. J. of Wuhan Univ. of Tech., 2001, 23: 9-13.