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Clinkerization of carbonatable belite–melilite clinker using solid waste at low temperature
Abstract A low calcium carbonatable belite-melilite clinker using around 70 wt% solid waste as raw material was designed in this work. Mechanisms of the phase transformation between belite, melilite and rankinite phase during clinkerization induced by MgO components were discussed combining phase diagram analysis and testing experiments such as quantitative XRD analysis and SEM. The clinker was prepared at around 1200 °C because of the components which facilitate the formation of melts such as MgO and Fe2O3. The clinkerization temperature, mechanical performance and CO2 fixation were discussed. The results show that much MgO component in the raw material causes the absence of C3S2 phase and the phase transformation of belite to C2MS2 phase because of the opposite driving force for the precipitation of the C3S2 phase from the liquid phase. In this work, the carbonatable belite-melilite clinker prepared from solid wastes shown narrow clinkerization temperature range, with the suitable clinkerization temperature at 1210 °C. Elevated clinkerization temperature facilitates the formation of C2MS2 phase by the reaction between the belite and the MgO component in the melts, leading to poor mechanical performance.
Highlights Low calcium carbonatable belite-melilite clinker using 70 wt% solid waste as raw material was prepared at 1200 °C. MgO component causes the absence of C3S2 because changes in Gibbs energy of liquid inhabites the precipitation of C3S2. Reaction between the belite and MgO forms C2MS2 phase at 1200 °C, leading to poor mechanical performance
Clinkerization of carbonatable belite–melilite clinker using solid waste at low temperature
Abstract A low calcium carbonatable belite-melilite clinker using around 70 wt% solid waste as raw material was designed in this work. Mechanisms of the phase transformation between belite, melilite and rankinite phase during clinkerization induced by MgO components were discussed combining phase diagram analysis and testing experiments such as quantitative XRD analysis and SEM. The clinker was prepared at around 1200 °C because of the components which facilitate the formation of melts such as MgO and Fe2O3. The clinkerization temperature, mechanical performance and CO2 fixation were discussed. The results show that much MgO component in the raw material causes the absence of C3S2 phase and the phase transformation of belite to C2MS2 phase because of the opposite driving force for the precipitation of the C3S2 phase from the liquid phase. In this work, the carbonatable belite-melilite clinker prepared from solid wastes shown narrow clinkerization temperature range, with the suitable clinkerization temperature at 1210 °C. Elevated clinkerization temperature facilitates the formation of C2MS2 phase by the reaction between the belite and the MgO component in the melts, leading to poor mechanical performance.
Highlights Low calcium carbonatable belite-melilite clinker using 70 wt% solid waste as raw material was prepared at 1200 °C. MgO component causes the absence of C3S2 because changes in Gibbs energy of liquid inhabites the precipitation of C3S2. Reaction between the belite and MgO forms C2MS2 phase at 1200 °C, leading to poor mechanical performance
Clinkerization of carbonatable belite–melilite clinker using solid waste at low temperature
Wang, Siye (author) / Gao, Fengyang (author) / Li, Bo (author) / Liu, Yuling (author) / Deng, Tengfei (author) / Zhang, Yunsheng (author) / Chen, Wei (author)
2024-02-06
Article (Journal)
Electronic Resource
English
Quality design of belite–melilite clinker
| Online Contents | 2013
Quality design of belite–melilite clinker
| Elsevier | 2013
Quality design of belite–melilite clinker
| Tema Archive | 2013