| Institute of Multipurpose Utilization of Mineral Resources, Chinese Academy of Geological Sciences | Host |
| Citation: |
Yang Huijun, Li Gang, Zhao Hongyan, Wang Aiqin, Ma Yuwei, Tang Hua, Wang Yuxue. Preparation and Properties of Expanded Perlite/Desulphurized Gypsum Composites[J]. Multipurpose Utilization of Mineral Resources, 2022, 43(3): 37-41. doi: 10.3969/j.issn.1000-6532.2022.03.007
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Preparation and Properties of Expanded Perlite/Desulphurized Gypsum Composites
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Abstract
The expanded perlite/desulphurized gypsum composite material was prepared with desulphurized gypsum and expanded perlite as the main raw materials. The single factor test method was used to study the effects of the material preparation method, the number of vibrations of the specimen, the amount of expanded perlite on their performance, and the optimal preparation method was determined. The results show that the desulfurized gypsum and citric acid are mixed and stirred well first, then the expanded perlite is added to stir, and finally the water is added and stirred to form the specimen directly. When the content of expanded perlite is 2.0%, the absolute dry flexural strength, absolute dry compressive strength, saturated water flexural strength and saturated water compressive strength of the composite materials are respectively 3.83 MPa, 8.92 MPa, 1.66 MPa and 4.26 MPa, the dry apparent density is 1.166 g/cm3, which met the requirements of the specification.
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Keywords:
- Desulfurization gypsum /
- Expanded perlite /
- Preparation /
- Performance
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References
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Yang Huijun, Li Gang, Zhao Hongyan, Wang Aiqin, Ma Yuwei, Tang Hua, Wang Yuxue. Preparation and Properties of Expanded Perlite/Desulphurized Gypsum Composites[J]. Multipurpose Utilization of Mineral Resources, 2022, 43(3): 37-41. doi: 10.3969/j.issn.1000-6532.2022.03.007
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Figure 1.
Effect of material preparation method on properties of composites
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Figure 3.
Effect of vibration frequency on dry apparent density of composites
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Figure 2.
Effect of vibration frequency of specimen on properties of composites
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Figure 4.
Effect of the content of expanded perlite on the absolute dry strength of the composite
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Figure 5.
Effect of expanded perlite content on dry apparent density of composites