MATEC Web Conf.
Volume 67, 2016International Symposium on Materials Application and Engineering (SMAE 2016)
|Number of page(s)||7|
|Section||Chapter 5 Metallurgical Engineering|
|Published online||29 July 2016|
Autoclaved Brick from Volume-Stability-Modified Steel Slag and Low Silicon Tailings
1 Department of Chemical Engineering, Hebei University of Science & Technology, Shijiazhuang 050018 P.R. China
2 Hebei Research Center of Pharmaceutical and Chemical Engineering, Shijiazhuang, P.R. China
3 Hebei Engineering and Research Center of Solid Waste Utilization, Shijiazhuang, P.R. China
Steel slag is a major industrial waste. Because of poor volume stability, its utilization was limited. We adopted polyphosphate modified steel slag and tailings to produce the autoclaved brick. The effects of various factors influencing the performance of brick were investigated, and the results were obtained: forming water 9%, forming pressure 20MPa, curing regime 4(temperature rising, hr)-4(temperature holding at 180°C, hr)-natural cooling (temperature dropping). With the content of modified steel slag in brick increased from 11% to 25%, the content of cement reduced from 7% to 5%, the compressive strength value increased from 11.6MPa to 22.1MPa.
Key words: Steel slag / Iron tailings / Volume stability / Autoclaved brick
© The Authors, published by EDP Sciences, 2016
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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