Preparation and performance evaluation of high-strength phosphogypsum aggregates by compaction and hydration
The preparation of high-strength phosphogypsum aggregates (HPA) was explored in this study by the compaction–fragmentation–grinding–hydration process from mixture of PG GGBS OPC dry powders. The dry powder blocks were first produced by compaction using the programed pressure and then was crushed int...
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| Veröffentlicht in: | Journal of material cycles and waste management 2024, Vol.26 (1), p.149-161 |
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| creator | Tan, Yunzhi Song, Ziyang Ming, Huajun Li, Hui Wu, Jun Wu, Chiqiu Hu, Bo |
| description | The preparation of high-strength phosphogypsum aggregates (HPA) was explored in this study by the compaction–fragmentation–grinding–hydration process from mixture of PG GGBS OPC dry powders. The dry powder blocks were first produced by compaction using the programed pressure and then was crushed into small pieces with angular shapes. The small pieces were grinded and then sprayed with saturated lime water. Hydration occurs in water-sprayed pieces, and the high-strength phosphogypsum aggregates (HPA) was produced after 28 days curing. The apparent density and cylinder compression strength of the HPA in drying state were up to 2010 kg/m
3
and 23.58 MPa, respectively. These results indicated that the rehydration process after compaction can make the prepared HPA obtain high density and strength, solving the shortcoming of the high-doped phosphogypsum products with low strength. Investigating phosphorus and fluoride pollutants in HPA showed that they met the requirements of water with Class I. Finally, the microscopic analysis of XRD and SEM identified that the phase type of the HPA were CaSO
4
and ettringite. The changes in the internal pores of the HPA in the curing process were explored by mercury intrusion porosimetry and the results further verified the HPA is well compacted. |
| doi_str_mv | 10.1007/s10163-023-01811-8 |
| format | Article |
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3
and 23.58 MPa, respectively. These results indicated that the rehydration process after compaction can make the prepared HPA obtain high density and strength, solving the shortcoming of the high-doped phosphogypsum products with low strength. Investigating phosphorus and fluoride pollutants in HPA showed that they met the requirements of water with Class I. Finally, the microscopic analysis of XRD and SEM identified that the phase type of the HPA were CaSO
4
and ettringite. The changes in the internal pores of the HPA in the curing process were explored by mercury intrusion porosimetry and the results further verified the HPA is well compacted.</description><identifier>ISSN: 1438-4957</identifier><identifier>EISSN: 1611-8227</identifier><identifier>DOI: 10.1007/s10163-023-01811-8</identifier><language>eng</language><publisher>Tokyo: Springer Japan</publisher><subject>Aggregates ; Bulk density ; Civil Engineering ; Compaction ; Compressive strength ; Curing ; Drying ; Engineering ; Environmental Management ; Ettringite ; High strength ; Hydration ; Mercury ; Microscopic analysis ; Original Article ; Performance evaluation ; Phosphogypsum ; Porosity ; Rehydration ; Waste Management/Waste Technology</subject><ispartof>Journal of material cycles and waste management, 2024, Vol.26 (1), p.149-161</ispartof><rights>The Author(s), under exclusive licence to Springer Nature Japan KK, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c319t-e34c477c95b08887c987170844b94f271b70eb2fde52e5b0448fe81a276090fc3</citedby><cites>FETCH-LOGICAL-c319t-e34c477c95b08887c987170844b94f271b70eb2fde52e5b0448fe81a276090fc3</cites><orcidid>0000-0002-0223-7752</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s10163-023-01811-8$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s10163-023-01811-8$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,780,784,27922,27923,41486,42555,51317</link.rule.ids></links><search><creatorcontrib>Tan, Yunzhi</creatorcontrib><creatorcontrib>Song, Ziyang</creatorcontrib><creatorcontrib>Ming, Huajun</creatorcontrib><creatorcontrib>Li, Hui</creatorcontrib><creatorcontrib>Wu, Jun</creatorcontrib><creatorcontrib>Wu, Chiqiu</creatorcontrib><creatorcontrib>Hu, Bo</creatorcontrib><title>Preparation and performance evaluation of high-strength phosphogypsum aggregates by compaction and hydration</title><title>Journal of material cycles and waste management</title><addtitle>J Mater Cycles Waste Manag</addtitle><description>The preparation of high-strength phosphogypsum aggregates (HPA) was explored in this study by the compaction–fragmentation–grinding–hydration process from mixture of PG GGBS OPC dry powders. The dry powder blocks were first produced by compaction using the programed pressure and then was crushed into small pieces with angular shapes. The small pieces were grinded and then sprayed with saturated lime water. Hydration occurs in water-sprayed pieces, and the high-strength phosphogypsum aggregates (HPA) was produced after 28 days curing. The apparent density and cylinder compression strength of the HPA in drying state were up to 2010 kg/m
3
and 23.58 MPa, respectively. These results indicated that the rehydration process after compaction can make the prepared HPA obtain high density and strength, solving the shortcoming of the high-doped phosphogypsum products with low strength. Investigating phosphorus and fluoride pollutants in HPA showed that they met the requirements of water with Class I. Finally, the microscopic analysis of XRD and SEM identified that the phase type of the HPA were CaSO
4
and ettringite. 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The dry powder blocks were first produced by compaction using the programed pressure and then was crushed into small pieces with angular shapes. The small pieces were grinded and then sprayed with saturated lime water. Hydration occurs in water-sprayed pieces, and the high-strength phosphogypsum aggregates (HPA) was produced after 28 days curing. The apparent density and cylinder compression strength of the HPA in drying state were up to 2010 kg/m
3
and 23.58 MPa, respectively. These results indicated that the rehydration process after compaction can make the prepared HPA obtain high density and strength, solving the shortcoming of the high-doped phosphogypsum products with low strength. Investigating phosphorus and fluoride pollutants in HPA showed that they met the requirements of water with Class I. Finally, the microscopic analysis of XRD and SEM identified that the phase type of the HPA were CaSO
4
and ettringite. The changes in the internal pores of the HPA in the curing process were explored by mercury intrusion porosimetry and the results further verified the HPA is well compacted.</abstract><cop>Tokyo</cop><pub>Springer Japan</pub><doi>10.1007/s10163-023-01811-8</doi><tpages>13</tpages><orcidid>https://orcid.org/0000-0002-0223-7752</orcidid></addata></record> |
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| ispartof | Journal of material cycles and waste management, 2024, Vol.26 (1), p.149-161 |
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| subjects | Aggregates Bulk density Civil Engineering Compaction Compressive strength Curing Drying Engineering Environmental Management Ettringite High strength Hydration Mercury Microscopic analysis Original Article Performance evaluation Phosphogypsum Porosity Rehydration Waste Management/Waste Technology |
| title | Preparation and performance evaluation of high-strength phosphogypsum aggregates by compaction and hydration |
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