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Study on performance and function mechanisms of whisker modified flue gas desulfurization (FGD) gypsum
Graphical abstract Display Omitted
Highlights The properties of FGD gypsum matrix composites with inorganic whiskers were studied. Whiskers can significantly improve the mechanical properties of FGD gypsum matrix composites. Calcium carbonate whisker (CW) can improve the water resistance of FGD gypsum matrix composites. Anhydrous calcium sulfate whisker (ACSW) was tightly combined with the substrate.
Abstract The high annual output and low utilization rate of flue gas desulfurization (FGD) gypsum cause acute damage to the environment in China. FGD gypsum board is a potential product, but its wide application is limited due to its poor mechanical properties and water resistance. Here, anhydrous calcium sulfate whisker (ACSW) and calcium carbonate whisker (CW) were chosen to improve the properties of FGD gypsum. The effects of two types of whiskers on the working performance, mechanical properties, and water resistance of FGD gypsum were analyzed and compared. The results show that the incorporation of whiskers reduced the processability of the FGD gypsum slurry. The mechanical properties of FGD gypsum improved greatly because the whiskers can increase the contact points between the crystals and fill the pores in FGD gypsum. The 7-day dry flexural strength of FGD gypsum with ACSW and CW increased by 46.99% and 33.07%, respectively. ACSW was better for enhancement than CW due to its good adhesion with gypsum. However, ACSW was not as effective as CW in improving the water resistance, because the structure of ACSW will be destroyed in a humid environment. This research focuses on improving the mechanical and further utilization of FGD gypsum, which also provides a theoretical basis for improving the performance of FGD gypsum.
Study on performance and function mechanisms of whisker modified flue gas desulfurization (FGD) gypsum
Graphical abstract Display Omitted
Highlights The properties of FGD gypsum matrix composites with inorganic whiskers were studied. Whiskers can significantly improve the mechanical properties of FGD gypsum matrix composites. Calcium carbonate whisker (CW) can improve the water resistance of FGD gypsum matrix composites. Anhydrous calcium sulfate whisker (ACSW) was tightly combined with the substrate.
Abstract The high annual output and low utilization rate of flue gas desulfurization (FGD) gypsum cause acute damage to the environment in China. FGD gypsum board is a potential product, but its wide application is limited due to its poor mechanical properties and water resistance. Here, anhydrous calcium sulfate whisker (ACSW) and calcium carbonate whisker (CW) were chosen to improve the properties of FGD gypsum. The effects of two types of whiskers on the working performance, mechanical properties, and water resistance of FGD gypsum were analyzed and compared. The results show that the incorporation of whiskers reduced the processability of the FGD gypsum slurry. The mechanical properties of FGD gypsum improved greatly because the whiskers can increase the contact points between the crystals and fill the pores in FGD gypsum. The 7-day dry flexural strength of FGD gypsum with ACSW and CW increased by 46.99% and 33.07%, respectively. ACSW was better for enhancement than CW due to its good adhesion with gypsum. However, ACSW was not as effective as CW in improving the water resistance, because the structure of ACSW will be destroyed in a humid environment. This research focuses on improving the mechanical and further utilization of FGD gypsum, which also provides a theoretical basis for improving the performance of FGD gypsum.
Study on performance and function mechanisms of whisker modified flue gas desulfurization (FGD) gypsum
Jian, Shouwei (author) / Yang, Xin (author) / Gao, Wenbin (author) / Li, Baodong (author) / Gao, Xin (author) / Huang, Weichao (author) / Tan, Hongbo (author) / Lei, Yuting (author)
2021-07-20
Article (Journal)
Electronic Resource
English
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