| Popis: |
Dubai is one of the fastest growing cities in the world. Construction industry has been in quest to meet this growth. High performance concrete has been of a great interest to the construction industry. In this research different design mixes were tried to produce concrete of ultra-high performance (UHPC). Targeting to develop concrete of ultra-high performance (UHPC), six mixes (scenarios) were designed. One normal mix was designed as a baseline. The six scenarios were made by changing the mix ingredients (materials), additives, and curing time. Twenty one specimens (cubes, 3 cubes of each mix) were prepared and tested. In order to monitor the development of the compressive strength, the specimens were tested after 7, 14 and 28 days of curing. Curing was done in hot (35+/-2 °C) and normal (20+/-2 °C) water. Then, the characteristics of each scenario were compared to the baseline characteristics. Almost all the scenarios showed increase in the compressive strength. Changes in the ingredients, the temperature of the curing, and curing time resulted in increase in the strength of different magnitudes. Regarding the materials and additives, the increase in strength is of average magnitude of 43 MPa. Regarding the curing time, the increase in strength is of average magnitude of 17 MPa. Regarding the temperature of the water used for curing, the increase in strength is of average magnitude of 6 MPa. |
