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Modeling of Crumb Rubber Concrete for a Structural Column by Evaluating the use of FRP

Ghaznavi Doozandeh, Soheil | 2016

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  1. Type of Document: M.Sc. Thesis
  2. Language: English
  3. Document No: 48360 (53)
  4. University: Sharif University of Technology, International Campus, Kish Island
  5. Department: Science and Engineering
  6. Advisor(s): Khaloo, Alireza
  7. Abstract:
  8. The research shows that the compressive strength of concrete reduced by replacing crumb rubber in concrete mix design compared to normal concrete mix design. However, there have been a couple of utilizations investigated to date for the structural utilization of these materials. Crumb rubber is usually provided from recycled rubber from automotive and truck scrap tires. During the recycling process steel and triviality are removed, leaving tire rubber with a granulose cohesiveness. The additional crumb-rubber aggregate has a significant effect on concrete mix porosity which affects both the plastic state workability and hardened state mechanical properties. This research depicts an experimental and modeling led to investigate the conceivable future utilization of the CRC for structures such as a column by assessing the utilization of Fiber Reinforced Polymer (FRP) confinement as a method for conquering the material lacks such as compressive strength decrement. The outcomes demonstrated that the utilization of FRP to confined rubberized concrete viably invalidates the lessening in strength, and holds the benefits of expanded flexibility and ductility that emerge from rubberized concrete. In this investigation 3.5% of aggregates replaced by crumb rubber and this caused compressive strength decrement. However, using silica fume did not enhance the compressive strength up to 28 days of age. On other hand, 3 layers of FRP confinement improved the compressive strength of crumb rubber concrete. This demonstrates promising potential for structural column applications, especially in seismic zones
  9. Keywords:
  10. Crumb Rubber Modifier ; Silica Fume ; Fiber Reinforced Polymer (FRP) ; Silica Fume Concrete ; Fiber Reinforced Polymer (FRP)Confinement

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