Microanalytical characterizations, mechanical strength and water resistance performance of solidified dredged sludge with industrial solid waste and architecture residue soil
Industrial solid waste (slag, desulphurization gypsum, fly ash) and construction soil architecture residue soil are used to solidify dredged silt to develop a novel cover material. Through the application of shear, compressive, and permeability tests, shear strength parameters, unconfined compressiv...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-12-01
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| Series: | Case Studies in Construction Materials |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509522006246 |
| _version_ | 1798000611598270464 |
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| author | Ye Liu Haijun Lu Mengyi Liu Lei Cai Na Wei Yajun Liu |
| author_facet | Ye Liu Haijun Lu Mengyi Liu Lei Cai Na Wei Yajun Liu |
| author_sort | Ye Liu |
| collection | DOAJ |
| description | Industrial solid waste (slag, desulphurization gypsum, fly ash) and construction soil architecture residue soil are used to solidify dredged silt to develop a novel cover material. Through the application of shear, compressive, and permeability tests, shear strength parameters, unconfined compressive strength, volume shrinkage and hydraulic conductivity of the cured silt were assessed under the different curing times and wet-dry cycles conditions. The result shown slag played the most significant role in the silt consolidation process, followed by FGD gypsum and fly ash. X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), scanning electron microscopy with energy dispersive spectroscopy (SEM-EDS) and nuclear magnetic resonance (NMR) detection methods were employed to determine the hydration products, chemical characteristics, microscopic morphology and pore structure of the solidified sludge, and identify the solidification mechanisms of the industrial waste and slag. After the wet and dry cycles, micropores and foramen (0.1–0.5 µm) continued to dominate pores, accounting for 64–76 % of pore space. Hydration products in the solidified sludge primarily consisted of C-S-H, C-A-S-H, and N-A-S-H gelled products, along with ettringite and zeolite. |
| first_indexed | 2024-04-11T11:23:06Z |
| format | Article |
| id | doaj.art-c9eec849e7c04bad966ad117a8a4df98 |
| institution | Directory Open Access Journal |
| issn | 2214-5095 |
| language | English |
| last_indexed | 2024-04-11T11:23:06Z |
| publishDate | 2022-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj.art-c9eec849e7c04bad966ad117a8a4df982022-12-22T04:26:43ZengElsevierCase Studies in Construction Materials2214-50952022-12-0117e01492Microanalytical characterizations, mechanical strength and water resistance performance of solidified dredged sludge with industrial solid waste and architecture residue soilYe Liu0Haijun Lu1Mengyi Liu2Lei Cai3Na Wei4Yajun Liu5School of Civil Engineering and Architecture, Wuhan Polytechnic University, Wuhan 430023, China; State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, ChinaSchool of Civil Engineering and Architecture, Wuhan Polytechnic University, Wuhan 430023, China; State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; Correspondence to: School of Civil Engineering and Architecture, Wuhan Polytechnic University, China.School of Civil Engineering and Architecture, Wuhan Polytechnic University, Wuhan 430023, China; State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; Correspondence to: School of Civil Engineering and Architecture, Wuhan Polytechnic University, China.School of Civil Engineering and Architecture, Wuhan Polytechnic University, Wuhan 430023, ChinaSchool of Civil Engineering and Architecture, Wuhan Polytechnic University, Wuhan 430023, ChinaSchool of Civil Engineering and Architecture, Wuhan Polytechnic University, Wuhan 430023, China; State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, ChinaIndustrial solid waste (slag, desulphurization gypsum, fly ash) and construction soil architecture residue soil are used to solidify dredged silt to develop a novel cover material. Through the application of shear, compressive, and permeability tests, shear strength parameters, unconfined compressive strength, volume shrinkage and hydraulic conductivity of the cured silt were assessed under the different curing times and wet-dry cycles conditions. The result shown slag played the most significant role in the silt consolidation process, followed by FGD gypsum and fly ash. X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), scanning electron microscopy with energy dispersive spectroscopy (SEM-EDS) and nuclear magnetic resonance (NMR) detection methods were employed to determine the hydration products, chemical characteristics, microscopic morphology and pore structure of the solidified sludge, and identify the solidification mechanisms of the industrial waste and slag. After the wet and dry cycles, micropores and foramen (0.1–0.5 µm) continued to dominate pores, accounting for 64–76 % of pore space. Hydration products in the solidified sludge primarily consisted of C-S-H, C-A-S-H, and N-A-S-H gelled products, along with ettringite and zeolite.http://www.sciencedirect.com/science/article/pii/S2214509522006246Landfill coverSolidified dredged sludgeIndustrial solid wasteArchitecture residue soilPore structure |
| spellingShingle | Ye Liu Haijun Lu Mengyi Liu Lei Cai Na Wei Yajun Liu Microanalytical characterizations, mechanical strength and water resistance performance of solidified dredged sludge with industrial solid waste and architecture residue soil Case Studies in Construction Materials Landfill cover Solidified dredged sludge Industrial solid waste Architecture residue soil Pore structure |
| title | Microanalytical characterizations, mechanical strength and water resistance performance of solidified dredged sludge with industrial solid waste and architecture residue soil |
| title_full | Microanalytical characterizations, mechanical strength and water resistance performance of solidified dredged sludge with industrial solid waste and architecture residue soil |
| title_fullStr | Microanalytical characterizations, mechanical strength and water resistance performance of solidified dredged sludge with industrial solid waste and architecture residue soil |
| title_full_unstemmed | Microanalytical characterizations, mechanical strength and water resistance performance of solidified dredged sludge with industrial solid waste and architecture residue soil |
| title_short | Microanalytical characterizations, mechanical strength and water resistance performance of solidified dredged sludge with industrial solid waste and architecture residue soil |
| title_sort | microanalytical characterizations mechanical strength and water resistance performance of solidified dredged sludge with industrial solid waste and architecture residue soil |
| topic | Landfill cover Solidified dredged sludge Industrial solid waste Architecture residue soil Pore structure |
| url | http://www.sciencedirect.com/science/article/pii/S2214509522006246 |
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