Solidification/Stabilization of Fly Ash from a Municipal Solid Waste Incineration Facility Using Portland Cement
This study investigated the solidification/stabilization of fly ash containing heavy metals using the Portland cement as a binder. It is found that both the cement/fly ash ratio and curing time have significant effects on the mechanical (i.e., compressive strength) and leaching behaviors of the stab...
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| Format: | Article |
| Language: | English |
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Wiley
2016-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2016/7101243 |
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| author | Qiang Tang Yang Liu Fan Gu Ting Zhou |
| author_facet | Qiang Tang Yang Liu Fan Gu Ting Zhou |
| author_sort | Qiang Tang |
| collection | DOAJ |
| description | This study investigated the solidification/stabilization of fly ash containing heavy metals using the Portland cement as a binder. It is found that both the cement/fly ash ratio and curing time have significant effects on the mechanical (i.e., compressive strength) and leaching behaviors of the stabilized fly ash mixtures. When the cement/fly ash ratio increases from 4 : 6 to 8 : 2, the increase of compressive strength ratio raises from 42.24% to 80.36%; meanwhile, the leaching amount of heavy metals decreases by 2.33% to 85.23%. When the curing time increases from 3 days to 56 days, the compressive strength ratio of mixtures raises from 240.00% to 414.29%; meanwhile, the leaching amount of heavy metals decreases by 16.49% to 88.70%. The decrease of compressive strength with the lower cement/fly ash ratios and less curing time can be attributed to the increase of fly ash loading, which hinders the formation of ettringite and destroys the structure of hydration products, thereby resulting in the pozzolanic reaction and fixation of water molecules. Furthermore, the presence of cement causes the decrease of leaching, which results from the formation of ettringite and the restriction of heavy metal ion migration in many forms, such as C-S-H gel and adsorption. |
| format | Article |
| id | doaj-art-5e8c15bd69e14e94a8a43aeb84b2d751 |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2016-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-5e8c15bd69e14e94a8a43aeb84b2d7512025-08-20T03:34:32ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422016-01-01201610.1155/2016/71012437101243Solidification/Stabilization of Fly Ash from a Municipal Solid Waste Incineration Facility Using Portland CementQiang Tang0Yang Liu1Fan Gu2Ting Zhou3School of Urban Rail Transportation, Soochow University, Soochow, ChinaSchool of Urban Rail Transportation, Soochow University, Soochow, ChinaTexas A&M Transportation Institute, Texas A&M University, College Station, TX, USASchool of Urban Rail Transportation, Soochow University, Soochow, ChinaThis study investigated the solidification/stabilization of fly ash containing heavy metals using the Portland cement as a binder. It is found that both the cement/fly ash ratio and curing time have significant effects on the mechanical (i.e., compressive strength) and leaching behaviors of the stabilized fly ash mixtures. When the cement/fly ash ratio increases from 4 : 6 to 8 : 2, the increase of compressive strength ratio raises from 42.24% to 80.36%; meanwhile, the leaching amount of heavy metals decreases by 2.33% to 85.23%. When the curing time increases from 3 days to 56 days, the compressive strength ratio of mixtures raises from 240.00% to 414.29%; meanwhile, the leaching amount of heavy metals decreases by 16.49% to 88.70%. The decrease of compressive strength with the lower cement/fly ash ratios and less curing time can be attributed to the increase of fly ash loading, which hinders the formation of ettringite and destroys the structure of hydration products, thereby resulting in the pozzolanic reaction and fixation of water molecules. Furthermore, the presence of cement causes the decrease of leaching, which results from the formation of ettringite and the restriction of heavy metal ion migration in many forms, such as C-S-H gel and adsorption.http://dx.doi.org/10.1155/2016/7101243 |
| spellingShingle | Qiang Tang Yang Liu Fan Gu Ting Zhou Solidification/Stabilization of Fly Ash from a Municipal Solid Waste Incineration Facility Using Portland Cement Advances in Materials Science and Engineering |
| title | Solidification/Stabilization of Fly Ash from a Municipal Solid Waste Incineration Facility Using Portland Cement |
| title_full | Solidification/Stabilization of Fly Ash from a Municipal Solid Waste Incineration Facility Using Portland Cement |
| title_fullStr | Solidification/Stabilization of Fly Ash from a Municipal Solid Waste Incineration Facility Using Portland Cement |
| title_full_unstemmed | Solidification/Stabilization of Fly Ash from a Municipal Solid Waste Incineration Facility Using Portland Cement |
| title_short | Solidification/Stabilization of Fly Ash from a Municipal Solid Waste Incineration Facility Using Portland Cement |
| title_sort | solidification stabilization of fly ash from a municipal solid waste incineration facility using portland cement |
| url | http://dx.doi.org/10.1155/2016/7101243 |
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