| 요약2 |
Tower, the tallest building of the world, was performed so as to meet the requirements of rheological property, mechanical properties & construction sequences based on material analysis in Dubai, UAE. Experimental investigations were carried out to evaluate &optimize the quantities of total binders, the proportions of Micro Silica, Dune Sand & PFA,changes of S/a and the comparison of chemical admixture, etc. Approximately 65,000㎥ of C80A concrete has been poured to the vertical members since 16-Apr-2006. In the actual application, it was showed that C80A has proper early strength achievement, excellent mechanical properties and satisfactory flowability & workability. The results of extensive site testing can be summarized that the average compressive strength at 28days is 98.8㎫, the average elastic modulus at 28days is 47.8㎬, the flow of concrete after pumping at the height of 250m (L72) was over 500㎜. |