Masters Theses

Noor S. Yacob

Keywords and Phrases

Fly ash; Geopolymer concrete; Reinforced concrete; Shear deformation; Shear strength; Structural behavior

Abstract

"The geopolymerisation of aluminosilicate materials such as fly ash has been a radical change in construction material's chemistry and composition, compared to the portland cement-based concrete calcium silicate-hydrate chemistry. The adoption of fly ash in concrete industry is a good use of by-product ashes to reduce emissions of the greenhouse gas implicitly. However, in this research, the replacement of portland cement by fly ash is 100%, which makes it a zero-cement concrete with no proprietary chemical additives.

Geopolymer concrete (GC) is a revolutionary synthetic material that combines sustainability and high engineering properties, and it is relatively cost-effective compared to portland cement-based concrete, its traditional competitor. Limited research on the structural performance of GC versus the microstructural and material properties has been conducted until now, thus this research focuses on the shear behavior of fly ash-based geopolymer concrete. The main three factors that affect the shear strength are dowel action, shear reinforcement ratio, and shear span-to-effective depth ratio. The experimental program consists of six beams: one Conventional Concrete (CC) beam and five Geopolymer Concrete (GC) beams. Two beams had no stirrups and different flexural reinforcement ratio (ρω), two beams had different shear reinforcement ratio (different stirrup spacing, s) and one beam had higher shear span-to-effective depth ratio (α/d). All the beams failed in shear except two beams; one had higher α/d ratio and one had smaller s. These beams failed in flexural-shear mode. All the GC beams showed high shear strength"--Abstract, page iv.

Advisor(s)

ElGawady, Mohamed

Committee Member(s)

Myers, John
Sneed, Lesley
Said, Aly M.

Department(s)

Civil, Architectural and Environmental Engineering

Degree Name

M.S. in Civil Engineering

Publisher

Missouri University of Science and Technology

Publication Date

Fall 2016

Journal article titles appearing in thesis/dissertation

  • Shear behavior of reinforced alkali-activated fly ash- based geopolymer concrete

Pagination

xiii, 103 pages

Note about bibliography

Includes bibliographical references.

Rights

© 2016 Noor S. Yacob, All rights reserved.

Document Type

Thesis - Open Access

File Type

text

Language

English

Thesis Number

T 11512

Electronic OCLC #

1104294303

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