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Properties Evaluation of Self-Consolidating Concrete Containing Rice Husk Ash

Nourbakhsh, Ali | 2011

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  1. Type of Document: M.Sc. Thesis
  2. Language: English
  3. Document No: 41734 (53)
  4. University: Sharif University of Technology, International Campus, Kish Island
  5. Department: Science and Engineering
  6. Advisor(s): Jahanshahi, Mohsen; Shams, Mohammad Reza
  7. Abstract:
  8. The Self-Consolidating (Compacting) Concrete (SCC) is a high performance concrete. Due to preventing it from segregation, SCC is known by its need to higher dosage of super plasticizer and viscose modifying agents. This increases the cost and reduces the popularity of SCC in construction industry. In this thesis, the production of Rice Husk Ash (RHA) from a controlled burning process using a special designed furnace, and cement replacement feasibility in the concrete mixture by low cost RHA, as an active pozzulanic additive have been investigated. Finding an appropriate ratio of replacement with cement for RHA and further effects on mechanical properties of SCC have been evaluated. The routine fresh state tests of self-compacting concrete due to observation of the workability and deformability of concrete like Slump, J Ring, V-Funnel and L-Box tests have been studied. In addition, standard hardened concrete state tests according to ASTMhave been carried out and the change in permeability and porosity of RHA cement self-compacting concrete has been investigated. Also, the X-Ray Florescent (XRF) test, for determining the element combination contents of rice husk ash after burning, has been performed. The findings of this research show the compressive strength of self-compacting concrete is higher while the RHA to cement ratio increases up to 20%. Meanwhile the permeability of the concrete is much more less than the ordinary SCC
  9. Keywords:
  10. Rice Husk Ash ; Self Compacting Concrete (SCC) ; Chloride Penetration ; Pozzolanic Activity

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