Loading...

Mass Concrete and a Method for Preventing their Strength Decline

Mohammadi, Abolfazl | 2011

830 Viewed
  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 41927 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Khonsari, Vaheed
  7. Abstract:
  8. Due to the wide application of Mass Concrete in the body and the foundation of dams, foundations of tall buildings, industrial machinery, and power plants, foundation and piers of bridges, etc.,it is necessary to devise methods in order to prevent the adverse effects of the high volume of such concretes. Since the major negative outcome of high volume is the decrease of the strength of concrete, which in turn is the direct consequence of the cracks resulted from high increase in the temperature within the volume of the concrete as a result of Hydration process and the produced heat which remains inside the bulk of concrete, any solution should involve some form of transferring the heat to the outside of the volume of concrete and reducing its inside temperature. While various methods including placing permanent coils inside the concrete through which water is running were already proposed by others, in this project permanent metallic pipes with and without holes are placed inside the concrete through which water is injected to the core of the bulk of concrete to reduce the temperature of the heart of the bulk. Compression tests carried out on the specimens of concrete cut out from various locations within bulks of concrete measured 60×60×60 cm3 shows the effectiveness of placing the metallic pipes inside the concrete and also the further effectiveness of using pipes with holes in improving the compressive strength of concrete
  9. Keywords:
  10. Mass Concrete ; Concrete Compressive Strenght ; Cement Hydration ; Maximum Internal Concrete Temperature ; Porous Tabe

 Digital Object List

 Bookmark

No TOC