자료유형  

 학위논문

Control Number  

0016932412

International Standard Book Number  

9798379718633

Dewey Decimal Classification Number  

624

Main Entry-Personal Name  

Pu, Christine.

Publication, Distribution, etc. (Imprint  

[S.l.] : Princeton University., 2023

Publication, Distribution, etc. (Imprint  

Ann Arbor : ProQuest Dissertations & Theses, 2023

Physical Description  

1 online resource(225 p.)

General Note  

Source: Dissertations Abstracts International, Volume: 84-12, Section: B.

General Note  

Advisor: White, Claire E.

Dissertation Note  

Thesis (Ph.D.)--Princeton University, 2023.

Restrictions on Access Note  

This item must not be sold to any third party vendors.

Summary, Etc.  

요약Portland cement (PC) is a major source of greenhouse gases and produces 8% of the world's anthropogenic carbon dioxide. Alkali-activated materials (AAMs) are cementitious alternatives that are capable of the same structural performance as PC (i.e., hydrated PC powder) while reducing carbon dioxide emissions. However, AAMs are currently not commonly used in industry, partly due to issues with lack of performance-manipulating additives like those available on the market for PC, as additives made for PC often are not effective in AAMs. In literature, cations and nano sodium aluminosilicate NPs have shown promising results for use as additives in AAMs. Additionally, there is currently no consensus on the extent of carbon dioxide reductions provided by different types of AAMs or cost compared to PC, especially when considering transportation-related emissions and current supply chain in the United States. Hence, this dissertation focuses on studying the impact of two types of potential additives, sodium aluminosilicate nanoparticles (NPs) and cations, on the structure, durability, and sustainability of alkali-activated metakaolin (AAMK).The first part of this dissertation focuses on the synthesis of sodium aluminosilicate NPs (nano zeolites, nano nepheline, and nano sodium-alumino-silicate-hydrate (N-A-S(-H) gel)) using low-rpm ball-milling with in-situ recrystallization and their subsequent use as additives in AAMK. Multiple characterization techniques such as isothermal conduction calorimetry (ICC), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR) are used to analyze the impact of NPs on the AAMK N-A-S(-H) gel nanostructure, reaction kinetics, and sulfuric acid durability. The second segment of this dissertation shifts to the use of cations (Ca, Ti, Mg, and Fe in the forms of portlandite, rutile, brucite, and hematite, respectively) as additives in AAMK, specifically investigating their impact on physical and mechanical properties, N-A-S(-H) gel nanostructure, and sulfuric acid durability. Additionally, using data gathered from a variety of techniques including inductively coupled plasma optical emission spectroscopy (ICP-OES) and scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDX), a mechanism of sulfuric acid attack in AAMK is hypothesized. The final segment of this dissertation estimates the carbon emissions and cost of AAMK dosed with the most successful additive tested, Mg, using specific locations and current market costs.

Subject Added Entry-Topical Term  

Civil engineering.

Subject Added Entry-Topical Term  

Materials science.

Subject Added Entry-Topical Term  

Analytical chemistry.

Subject Added Entry-Topical Term  

Nanoscience.

Index Term-Uncontrolled  

Alkali-activated materials

Index Term-Uncontrolled  

Cement

Index Term-Uncontrolled  

Geopolymer

Index Term-Uncontrolled  

Life cycle analysis

Index Term-Uncontrolled  

Nano zeolites

Index Term-Uncontrolled  

Sulfuric acid

Index Term-Uncontrolled  

Portland cement

Added Entry-Corporate Name  

Princeton University Civil and Environmental Engineering

Host Item Entry  

Dissertations Abstracts International. 84-12B.

Host Item Entry  

Dissertation Abstract International

Electronic Location and Access  

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Control Number  

joongbu:639845