Abstract
It is necessary to consider the dual problems of poor performance and low production efficiency that stem from the highly utilised water/gypsum ratios in the traditional preparation of phosphorus building gypsum (PBG)-based building materials. These problems cannot be easily overcome because that PBG tends to agglomerate at low water/gypsum ratios, which will hinder the hydration process and result in poor mechanical behaviour. In this study, a slurry-particle mixing system was proposed for the preparation of PBG-based building materials with homogeneous hydration at low water/gypsum ratios. More specifically, slurry-particle mixing system samples (SPMS) and pure PBG slurry samples (PPSS) with various water/gypsum ratios were prepared for comparative analysis. The results showed that the fluidity of SPMS with a low water/gypsum ratio could meet the actual production requirements. When compared with the PPSS, the SPMS had a lower water content and a higher dry density at the same water/gypsum ratios. When the water/gypsum ratio was low (e.g., 0.30), the SPMS exhibited more satisfactory moulding behaviour, greater absolutely dry compressive strength, and lower total porosity. In summary, this study presents a feasible method and viable theoretical guideline for the manufacture of PBG-based building materials with low water/gypsum ratios.
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The datasets generated during and/or analysed during the current study are available from the corresponding author on reasonable request.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (No. 52209136), the Changjiang River Academy of Sciences 2021 Open Research Fund (No. CKWV2021871/KY), and the Hubei Three Gorges Laboratory Open Fund (No. SK211003).
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WH Investigation, Formal analysis, Writing–original draft. YT Conceptualization, Funding acquisition, Resources, Supervision, Writing–review & editing. HM: Methodology, Supervision. HL: Writing–review & editing. JW Funding acquisition, Writing–review & editing. CW Resources. BH Resources.
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Huang, W., Tan, Y., Ming, H. et al. A novel method for preparing phosphorus building gypsum (PBG)-based building materials with low water/gypsum ratios. J Mater Cycles Waste Manag 25, 1035–1049 (2023). https://doi.org/10.1007/s10163-023-01595-x
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DOI: https://doi.org/10.1007/s10163-023-01595-x