A Calorimetric Study of the Effect of Organic Compounds On the Initial Behaviour of Cement-Based Solidified Wastes

Abstract

Seven organic compounds commonly found in toxic wastes were added to ordinary Portland cement (OPC) at varying concentrations. The influence of these organics, which display a variety of chemical characteristics, on the heat of hydration, setting, strength development and microstructure were observed. Most organics influenced early hydration by retardation or acceleration but mature samples displayed a similar phase composition to the OPC control. Microstructural observation of organic-containing OPC indicated that subtle spatial variations in the distribution of hydration phases and topographic features existed despite the absence of significant interference with normal hydration reactions.

Keywords

Ordinary Portland cement hydration toxic wastes organics solidification/stabilisation microstructure strength leaching.

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