Experim ent Study on Al ite—sul phoal uminate Cement Using Coal Gangues from Fuxing District,Liaoning Provence,China
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Abstract:
Voluminous wastes—coal gangues—have been discharged from innumerable coal mines in China, whichproduce a great deal of environm ent problem . The coal gangues from the coal mines of Fuxing district.Liaoning Provence,are mainly composed of quartz,illite,and feldspar,with a chemical composition of 6 0 9/5~7O SiOz,13 ~ 18 A1203,belonging to the high—silica/low alumina type coal gangues.This type of coalgangue has been considered difficult to use as a raw material for high—quality cement. A system C3S—C4A3S—C2S—C4AF has been designed in which the alumina of gangue has been taken to form sulphoaluminate(C4A3S)other than aluminate (C3A ) and thus form alite—sulphoaluminate cement. The C3S and C4A3S can be inparagenesis at 13OO~ 1360 C in using BaSO4,CaF2,Cr2O3 in industrial waste as activating agent. The clinkershave been prepared at 1 360 C for 1 hour. The compressive strength of the prepared alite—sulphoaluminatecement has been measured up to 34.7~ 36.8 M Pa and 52. 2~ 54.4 M Pa for 3 and 28 days。respectively.
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W ANG Guoping, SUN Chuanmin, ZHANG Pingping, W ANG Ziyou, SU Xiaoli, ZHONG Suhua.2005. Experim ent Study on Al ite—sul phoal uminate Cement Using Coal Gangues from Fuxing District,Liaoning Provence,China[J]. Geological Review,51(5):600-605.