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Investigation of Fracture Behavior of Geopolymer Concrete

Karamian, Mohammad Hossain | 2019

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 53050 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Toufigh, Vahab
  7. Abstract:
  8. Geopolymer concrete is one of the most environmentally friendly concretes that does not have any pollutants harmful to the environment. By-products that are normally harmful to the environment can be used in manufacturing this product, therefore, the use of this concrete is known as the first concrete replacement in the world. In order to use geopolymer concrete, it is necessary to an essential to know the mechanical information of these materials.In this study, the mechanical behavior of geopolymer concrete for fly ash and slag in terms of its stress and strain uniaxial loading and triaxial loading at , and15MPa pressures for three concrete mixing design are investigated.Then the numerical simulation is done by the information obtained. Also, in order to better understand the mechanical behavior of this concrete, the microstructure of these materials has been studied and the effect of slag changes on the microstructure has been studied. The behavior of these materials is then simulated by a nonlinear numerical simulation of the hierarchical single-surface plasticity model and disturbed state concept the results of this simulation are compared with the laboratory results.The results of this study indicate that slag replacement by 30% and reduction of fly ash to % binder lead to an increase in compressive strength to MPa . It has also lead to an increase in the modulus of elasticity and to the brittle behavior of concrete. This is also justified by microstructure studies
  9. Keywords:
  10. Fly Ash ; Slags ; Nonlinear Finite Element Analysis ; Microstructure ; Disturbed State Concept ; Geopolymer Concrete ; Hierarchical Single-Surface Plasticity

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