Mineralogical study of granite waste in a pozzolan/Ca(OH)2 system: Influence of the activation process
Source abstract
Abstract
[EN] Despite the technological improvements introduced in the production of ornamental granite, sludge is inevitably generated in end product cutting and polishing. The present study constitutes the first attempt to scientifically analyse granite sludge, focusing in particular on its characterisation and pozzolanic activity and the morphological and microstructural changes taking place in both thermally activated waste and in the pozzolan/Ca(OH)2 system in the first 360 days of reaction. The possible valorisation of this waste as a component of more eco-friendly cements is assessed with a view to furthering the circular economy. The findings show that thermal activation has no beneficial effect on sludge pozzolanicity, which at later ages was similar to the activity observed in other additions such as copper and manganese silicate slag but lower than in silica fume, fly ash and fired clay materials. The granite waste/Ca(OH)2 system microstructure, in turn, contains C-S-H gels characterised by a low (0.6–1.0) Ca/Si ratio.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Concrete and Cement Materials Research · Clay minerals and soil interactions · Recycling and utilization of industrial and municipal waste in materials production
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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