Application of Fly Ash and Slag Generated by Incineration of Municipal Solid Waste in Concrete
As landfill space for the disposal of products of municipal solid waste incineration (MSWI) such as fly ash and slag becomes increasingly scarce, a reduction of disposed material is urgently required. The method of using incineration products in concrete production is explored in this paper through...
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2020/7802103 |
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| author | Cong Zeng Yan Lyu Dehong Wang Yanzhong Ju Xiaoyu Shang Luoke Li |
| author_facet | Cong Zeng Yan Lyu Dehong Wang Yanzhong Ju Xiaoyu Shang Luoke Li |
| author_sort | Cong Zeng |
| collection | DOAJ |
| description | As landfill space for the disposal of products of municipal solid waste incineration (MSWI) such as fly ash and slag becomes increasingly scarce, a reduction of disposed material is urgently required. The method of using incineration products in concrete production is explored in this paper through a feasibility study of utilizing fly ash and slag to replace cement and coarse aggregate in appropriate proportions. Results show that C30 concrete optimum replacement rates of fly ash and slag are 30% and 20%, which can meet the minimum strength requirement. The leaching concentrations of Cu, Zn, Pb, Cr, and Cd in MSWI concrete samples are determined to be less than the identification value of solid waste leaching toxicity. Based on scanning electron microscopy (SEM) and X-ray diffraction (XRD) analyses, MSWI fly ash has certain dispersion. The particle size of MSWI fly ash is determined to be close to that of the coal fly ash, and the surface morphology is irregular. The main components include SiO2, CaCO3, and Ca2SiO4, and they are similar to those present in the coal fly ash. The slag structure is loose as well as irregular, and its main component is SiO2. The SiO2 and Al2O3 in fly ash and slag participate in the hydration reaction of cement and can increase concrete strength. It is thus confirmed that fly ash and slag generated by waste incineration can be used to replace cement and coarse aggregate in appropriate proportions, and it is an effective method to solve the problem of scarcity of solid waste landfill space. |
| format | Article |
| id | doaj-art-b3ff9c4b52c64a0cbd1770b5aacb6545 |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-b3ff9c4b52c64a0cbd1770b5aacb65452025-02-03T06:06:45ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422020-01-01202010.1155/2020/78021037802103Application of Fly Ash and Slag Generated by Incineration of Municipal Solid Waste in ConcreteCong Zeng0Yan Lyu1Dehong Wang2Yanzhong Ju3Xiaoyu Shang4Luoke Li5School of Civil Engineering and Architecture, Northeast Electric Power University, Jilin 132012, ChinaSchool of Civil Engineering and Architecture, Changchun Sci-Tech University, Changchun 130600, ChinaSchool of Civil Engineering and Architecture, Northeast Electric Power University, Jilin 132012, ChinaSchool of Civil Engineering and Architecture, Northeast Electric Power University, Jilin 132012, ChinaSchool of Civil Engineering and Architecture, Northeast Electric Power University, Jilin 132012, ChinaSchool of Civil Engineering and Architecture, Kunming University of Science and Technology, Kunming 650500, ChinaAs landfill space for the disposal of products of municipal solid waste incineration (MSWI) such as fly ash and slag becomes increasingly scarce, a reduction of disposed material is urgently required. The method of using incineration products in concrete production is explored in this paper through a feasibility study of utilizing fly ash and slag to replace cement and coarse aggregate in appropriate proportions. Results show that C30 concrete optimum replacement rates of fly ash and slag are 30% and 20%, which can meet the minimum strength requirement. The leaching concentrations of Cu, Zn, Pb, Cr, and Cd in MSWI concrete samples are determined to be less than the identification value of solid waste leaching toxicity. Based on scanning electron microscopy (SEM) and X-ray diffraction (XRD) analyses, MSWI fly ash has certain dispersion. The particle size of MSWI fly ash is determined to be close to that of the coal fly ash, and the surface morphology is irregular. The main components include SiO2, CaCO3, and Ca2SiO4, and they are similar to those present in the coal fly ash. The slag structure is loose as well as irregular, and its main component is SiO2. The SiO2 and Al2O3 in fly ash and slag participate in the hydration reaction of cement and can increase concrete strength. It is thus confirmed that fly ash and slag generated by waste incineration can be used to replace cement and coarse aggregate in appropriate proportions, and it is an effective method to solve the problem of scarcity of solid waste landfill space.http://dx.doi.org/10.1155/2020/7802103 |
| spellingShingle | Cong Zeng Yan Lyu Dehong Wang Yanzhong Ju Xiaoyu Shang Luoke Li Application of Fly Ash and Slag Generated by Incineration of Municipal Solid Waste in Concrete Advances in Materials Science and Engineering |
| title | Application of Fly Ash and Slag Generated by Incineration of Municipal Solid Waste in Concrete |
| title_full | Application of Fly Ash and Slag Generated by Incineration of Municipal Solid Waste in Concrete |
| title_fullStr | Application of Fly Ash and Slag Generated by Incineration of Municipal Solid Waste in Concrete |
| title_full_unstemmed | Application of Fly Ash and Slag Generated by Incineration of Municipal Solid Waste in Concrete |
| title_short | Application of Fly Ash and Slag Generated by Incineration of Municipal Solid Waste in Concrete |
| title_sort | application of fly ash and slag generated by incineration of municipal solid waste in concrete |
| url | http://dx.doi.org/10.1155/2020/7802103 |
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