Abstract
According to recent resolutions of the European Parliament (2012/2065(INI)), the need for environmentally friendly alternative solutions to landfill disposal of hazardous wastes, such as asbestos-containing materials, prompts their recycling as secondary raw materials (end of waste concept). In this respect, for the first time, we report the recycling of the high temperature product of cement-asbestos, in the formulation of calcium sulfoaluminate cement clinkers (novel cementitious binders designed to reduce CO2 emissions), as a continuation of a previous work on their systematic characterization. Up to 29wt% of the secondary raw material was successfully introduced into the raw mix. Different clinker samples were obtained at 1250°C and 1300°C, reproducing the phase composition of industrial analogues. As an alternative source of Ca and Si, this secondary raw material allows for a reduction of the CO2 emissions in cement production, mitigating the ecological impact of cement manufacturing, and reducing the need for natural resources.
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