关键词: 固体废物, 蒸压, 红外光谱, X射线衍射, 扫描电子显微镜, 水热反应能力

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