Journal of South China University of Technology (Natural Science Edition) ›› 2008, Vol. 36 ›› Issue (7): 124-127,133.

• Materials Science & Technology • Previous Articles     Next Articles

Fabrication of Autoclaved Silicate Products with Ceramic Polishing Powders as Raw Material

Wang Gong-xun  Su Da-gen  Zhao Yi-xiang     

  1. Key Laboratory of Specially Functional Materials of the Ministry of Education, South China University of Technology, Guangzhou 510640, Guangdong, China
  • Received:2008-04-23 Revised:2008-05-04 Online:2008-07-25 Published:2008-07-25
  • Contact: 王功勋（1979-），男，博士，主要从事新型建筑材料及工业废弃物再利用等的研究． E-mail:gongxunwang@yahoo．com．cn
  • About author:王功勋（1979-），男，博士，主要从事新型建筑材料及工业废弃物再利用等的研究．
  • Supported by:

    广州市科技攻关项目（2004440003110013）

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Abstract:

Autoclaved silicate products were fabricated with ceramic polishing powders as the raw material. The products were then compared with those fabricated with fly ash. Moreover, the hydrothermal properties, mineralogical compositions and morphologies of the products were investigated by means of IR, XRD, SEM and EDS, and the corresponding strengths were also measured. The results show that the autoclaved condition is beneficial to inspiring the pozzolanic activity of ceramic polishing powders, and that, as compared with fly ash, ceramic polishing powders provide more activated SiO2 for the reaction, thus lowering the Ca/Si ratio of the hydration product and improving the strength of the autoclaved products. It is also found that the products possess the highest strength at a lime-to- polishing powders mass ratio of 1 ： 3.

Key words: ceramic polishing powder, fly ash, autoclaved silicate product, pozzolanic activity, hydration pro- duct, strength