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Vasile, Bogdan Stefan; Nicoara, Adrian-Ionut; Surdu, Vasile-Adrian; Ene, Vladimir Lucian; Neacsu, Ionela Andreea; Stoica, Alexandra Elena; Oprea, Ovidiu; Boerasu, Iulian; Trusca, Roxana; Vrabec, Mirijam; Miklavic, Blaz; Sturm, Saso; Ow-Yang, Cleva; Gulgun, Mehmet Ali; Bundur, Zeynep Basaran
Materials, 04/2022, Volume: 15, Issue: 9Journal Article
The main objective of the study was to produce alternative binder materials, obtained with low cost, low energy consumption, and low CO production, by regenerating end-of-life (EOL) materials from mineral deposits, to replace ordinary Portland cement (OPC). The materials analyzed were ash and slag from the Turceni thermal power plant deposit, Romania. These were initially examined for morphology, mineralogical composition, elemental composition, degree of crystallinity, and heating behavior, to determine their ability to be used as a potential source of supplementary cementitious materials (SCM) and to establish the activation and transformation temperature in the SCM. The in-situ pozzolanic behavior of commercial cement, as well as cement mixtures with different percentages of ash addition, were further observed. The mechanical resistance, water absorption, sorptivity capacity, resistance to alkali reactions (ASR), corrosion resistance, and resistance to reaction with sulfates were evaluated in this study using low-vacuum scanning electron microscopy.
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