Journal of South China University of Technology (Natural Science Edition) ›› 2009, Vol. 37 ›› Issue (12): 32-36.

• Materials Science & Technology • Previous Articles     Next Articles

Autoclaved Performance of Solid Waste Containing Glass Phase

Zhang Zhi-jie1  Tang Zheng-yu1  Ke Chang-jun2   

  1. 1 School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China; 2. School of Urban Construction, Yangtze University, Jingzhou 434-023, Hubei, China
  • Received:2009-01-04 Revised:2009-01-18 Online:2009-12-25 Published:2009-12-25
  • Contact: 张志杰（1970-），男，博士，副教授，主要从事生态环境材料的研究． E-mail:imzhang@scut．edu．cn
  • About author:张志杰（1970-），男，博士，副教授，主要从事生态环境材料的研究．
  • Supported by:

    广东省科技计划项目（2008A030202006）;湖北省教育厅自然科学类重点项目（D200712005）;佛山市禅城区产学研专项资助项目（200881010）

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Abstract:

This paper investigates the autoclaved performance of the systems combining lime and such solid waste as fly ash, waste glass and slag by means of VF-IR, XRD and SEM. The results show that （ 1 ） at a saturated vapor pressure of 1.2 MPa, both the hydrothermal reactivity and the amount of combined water of the autoclaved product have an obvious negative correlation with the Si-O stretching vibration frequency; （2） the compressive strength of the autoclaved product containing fly ash or waste glass also has a negative correlation with the Si-O stretching vibration frequency; and （3） different from the other two products, the autoclaved product containing slag has a positive correlation with the Si-O stretching vibration frequency in terms of compressive strength, because there exists a large amount of hydrogarnet due to the reaction of activated Al in the slag with the lime.

Key words: solid waste, autoclaving, infrared spectrum, X-ray diffraction, scanning electron microscope, hydrothermal reactivity