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The Re-Use and Beneficiation of Industrial Waste Products into New Sources of Supplementary Cementitious Materials
The Re-Use and Beneficiation of Industrial Waste Products into New Sources of Supplementary Cementitious Materials
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202105556
- ISBN
- 9798265406026
- DDC
- 693.5
- 서명/저자
- The Re-Use and Beneficiation of Industrial Waste Products into New Sources of Supplementary Cementitious Materials
- 발행사항
- [Sl] : Georgia Institute of Technology, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 272 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-05, Section: B.
- 주기사항
- Advisor: Kurtis, Kimberly.
- 학위논문주기
- Thesis (Ph.D.)--Georgia Institute of Technology, 2024.
- 초록/해제
- 요약This thesis examines both the re-use and beneficiation of industrial wastebyproducts, primarily for use as supplementary cementitious materials (SCMs). Reducingcement clinker content in concrete is a significant strategy to meet the industry's decarbonization goals. Thus, potential SCM sources explored can be produced or are alreadyavailable at a scale consistent with the 20 billion tons of concrete produced annually. Thefirst half of this thesis primarily focuses on the potential re-use of two such SCM sources:ponded coal combustion products (CCPs) and dredged river sediment. This is done with aminor focus on other alternative uses, including their use as a lightweight aggregate, fineaggregates, and cement feedstock. The other half focuses on potential beneficiationprocesses, chemi-mechanical grinding and spray drying, that can be used to improve thereactivity and workability of these industrial byproducts respectively. However, thesebeneficiation methods can also be applied to conventional SCMs.The properties and performance of the candidate SCMs are characterized utilizingthe following techniques. Their chemical composition was assessed through x-rayfluorescence, x-ray diffraction, and attenuated total refractance. To determine their phasecomposition and oxide composition. Their physical properties (particle size andmorphology) was observed using laser particle size analysis and scanning electronmicroscopy. The pozzolanic reactivity of the candidate SCMs was measured after blendingcement pastes with thermogravimetric analysis, isothermal calorimetry, and the R3 testmethod. Which determine pozzolanic reactivity through the SCMs interactions withCa(OH)2. The performance of these SCMs was measured through the properties of blended mortars. Primarily via workability, compressive strength, alkali silica reaction mitigation,and their correlations with ASTM C618 specifications.These results showed the composition of ponded CCP samples to be largely similarto conventional Class F fly ash, primarily containing glassy aluminosilicate phases, alongwith quartz, mullite, and hematite. However, these samples also possess an elevated andhighly variable organic and unburnt carbon content. Along with elevated levels of ironoxides, hydrated phases, calcium sulfates, clays, calcium hydroxide, and carbonates, whencompared to conventional Class F fly ashes. The increased prevalence of these additionalphases come at the cost of the desirable glassy phases, which studies show would providepozzolanic reactivity to these samples, diminishing their utility as an SCM. Theexperimentation performed on the dredged river sediments showed they primarilycontained large quantities of quartz, kaolinite, muscovite with minor amounts of ironoxides and aluminum hydroxides. Additionally, relatively large quantities of diatoms arefound in these samples. These results suggest that the ponded CCP samples may be usableas SCMs without further processing; while the dredged river sediments does containdiatoms, which studies show are reactive in their natural state, it will need to be calcinedfirst to activate the kaolinite in the systems before they can be used as SCMs.Both industrial byproducts were minimally processed prior to their combinationwith cement. Both the ponded CCP and dredge material was dried at 110 °C overnight andmechanically processed. In addition, the dried dredge material was passed the samplesthrough a No. 170 sieve before finally calcining at 800 °C for 1 hour. Their pozzolanicitywas measured through thermogravimetric analysis, isothermal calorimetry, and the "rapid,relevant, and reliable" (R3) test method. The significant increase in amorphous silica in the ponded CCP after grinding suggests a correlating increase in pozzolanic reactivity. For thedredged river sediment, a significant decrease in Ca(OH)2 content in blended cement pastesis noted after the sediments were calcined. This confirms that the calcined sediments arepozzolanic and can potentially be utilized as SCMs.
- 일반주제명
- Concrete mixing
- 일반주제명
- By products
- 일반주제명
- Cement hydration
- 일반주제명
- Greenhouse gases
- 일반주제명
- Clay
- 일반주제명
- Emissions
- 일반주제명
- Carbon
- 일반주제명
- Silica
- 일반주제명
- Materials durability
- 일반주제명
- Potassium
- 일반주제명
- Outdoor air quality
- 일반주제명
- Fly ash
- 일반주제명
- Emission standards
- 일반주제명
- Coal
- 일반주제명
- Contamination
- 일반주제명
- Alternative energy
- 일반주제명
- Analytical chemistry
- 일반주제명
- Atmospheric sciences
- 일반주제명
- Climate change
- 기본자료저록
- Dissertations Abstracts International. 87-05B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■020 ▼a9798265406026
■035 ▼a(MiAaPQ)AAI32315881
■035 ▼a(MiAaPQ)GeorgiaTech75207
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a693.5
■1001 ▼aBenkeser, Daniel Joseph.
■24510▼aThe Re-Use and Beneficiation of Industrial Waste Products into New Sources of Supplementary Cementitious Materials
■260 ▼a[Sl]▼bGeorgia Institute of Technology▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a272 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-05, Section: B.
■500 ▼aAdvisor: Kurtis, Kimberly.
■5021 ▼aThesis (Ph.D.)--Georgia Institute of Technology, 2024.
■520 ▼aThis thesis examines both the re-use and beneficiation of industrial wastebyproducts, primarily for use as supplementary cementitious materials (SCMs). Reducingcement clinker content in concrete is a significant strategy to meet the industry's decarbonization goals. Thus, potential SCM sources explored can be produced or are alreadyavailable at a scale consistent with the 20 billion tons of concrete produced annually. Thefirst half of this thesis primarily focuses on the potential re-use of two such SCM sources:ponded coal combustion products (CCPs) and dredged river sediment. This is done with aminor focus on other alternative uses, including their use as a lightweight aggregate, fineaggregates, and cement feedstock. The other half focuses on potential beneficiationprocesses, chemi-mechanical grinding and spray drying, that can be used to improve thereactivity and workability of these industrial byproducts respectively. However, thesebeneficiation methods can also be applied to conventional SCMs.The properties and performance of the candidate SCMs are characterized utilizingthe following techniques. Their chemical composition was assessed through x-rayfluorescence, x-ray diffraction, and attenuated total refractance. To determine their phasecomposition and oxide composition. Their physical properties (particle size andmorphology) was observed using laser particle size analysis and scanning electronmicroscopy. The pozzolanic reactivity of the candidate SCMs was measured after blendingcement pastes with thermogravimetric analysis, isothermal calorimetry, and the R3 testmethod. Which determine pozzolanic reactivity through the SCMs interactions withCa(OH)2. The performance of these SCMs was measured through the properties of blended mortars. Primarily via workability, compressive strength, alkali silica reaction mitigation,and their correlations with ASTM C618 specifications.These results showed the composition of ponded CCP samples to be largely similarto conventional Class F fly ash, primarily containing glassy aluminosilicate phases, alongwith quartz, mullite, and hematite. However, these samples also possess an elevated andhighly variable organic and unburnt carbon content. Along with elevated levels of ironoxides, hydrated phases, calcium sulfates, clays, calcium hydroxide, and carbonates, whencompared to conventional Class F fly ashes. The increased prevalence of these additionalphases come at the cost of the desirable glassy phases, which studies show would providepozzolanic reactivity to these samples, diminishing their utility as an SCM. Theexperimentation performed on the dredged river sediments showed they primarilycontained large quantities of quartz, kaolinite, muscovite with minor amounts of ironoxides and aluminum hydroxides. Additionally, relatively large quantities of diatoms arefound in these samples. These results suggest that the ponded CCP samples may be usableas SCMs without further processing; while the dredged river sediments does containdiatoms, which studies show are reactive in their natural state, it will need to be calcinedfirst to activate the kaolinite in the systems before they can be used as SCMs.Both industrial byproducts were minimally processed prior to their combinationwith cement. Both the ponded CCP and dredge material was dried at 110 °C overnight andmechanically processed. In addition, the dried dredge material was passed the samplesthrough a No. 170 sieve before finally calcining at 800 °C for 1 hour. Their pozzolanicitywas measured through thermogravimetric analysis, isothermal calorimetry, and the "rapid,relevant, and reliable" (R3) test method. The significant increase in amorphous silica in the ponded CCP after grinding suggests a correlating increase in pozzolanic reactivity. For thedredged river sediment, a significant decrease in Ca(OH)2 content in blended cement pastesis noted after the sediments were calcined. This confirms that the calcined sediments arepozzolanic and can potentially be utilized as SCMs.
■590 ▼aSchool code: 0078.
■650 4▼aConcrete mixing
■650 4▼aBy products
■650 4▼aCement hydration
■650 4▼aGreenhouse gases
■650 4▼aClay
■650 4▼aEmissions
■650 4▼aCarbon
■650 4▼aThermogravimetric analysis
■650 4▼aSilica
■650 4▼aMaterials durability
■650 4▼aPotassium
■650 4▼aOutdoor air quality
■650 4▼aAlternative energy sources
■650 4▼aFly ash
■650 4▼aEmission standards
■650 4▼aIndustrial plant emissions
■650 4▼aCoal
■650 4▼aScanning electron microscopy
■650 4▼aContamination
■650 4▼aAlternative energy
■650 4▼aAnalytical chemistry
■650 4▼aAtmospheric sciences
■650 4▼aClimate change
■690 ▼a0363
■690 ▼a0486
■690 ▼a0725
■690 ▼a0543
■690 ▼a0404
■71020▼aGeorgia Institute of Technology.
■7730 ▼tDissertations Abstracts International▼g87-05B.
■790 ▼a0078
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17360613▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


