含玻璃相固体废物的蒸压反应特性

通过傅里叶变换红外光谱分析、X射线衍射分析、扫描电镜分析等方法研究了粉煤灰、废玻璃和矿渣等固体废弃物-石灰体系的蒸压反应特性.结果表明:1.2MPa饱和蒸汽压下,固体废弃物的 Si-O 伸缩振动频率越低,其蒸压样品的结合水量越大,水热反应能力越强;粉煤灰、废玻璃的 Si-O 伸缩振动频率越低,其蒸压样品的强度越高;矿渣蒸压样品的强度与矿渣的 Si-O 伸缩振动频率表现出不同于其他两种固体废弃物的规律,这主要是因为矿渣中的活性铝参与了反应,形成大量的水石榴石,导致其蒸压样品的强度下降.

Autoclaved Performance of Solid Waste Containing Glass Phase

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 FT-IR, XRD and SEM. The results show that (1) at a saturated vapor pressure of 1.2MPa, 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.