gallery:temperaturecolumn
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| The same cement was used in concrete production thus parameters of the affinity model remained the same. A column 0.5 x 0.5 x 1.5 m was cast in two steps with approximately 3 days time lag between casting. Thermal insulation 0.25 m thick was present on all vertical faces of the column. Bottom and top parts had equal 0.75 m length. Top parts were covered by a foil to prevent water evaporation and excessive heat loss. Figure below shows experimental setup. | The same cement was used in concrete production thus parameters of the affinity model remained the same. A column 0.5 x 0.5 x 1.5 m was cast in two steps with approximately 3 days time lag between casting. Thermal insulation 0.25 m thick was present on all vertical faces of the column. Bottom and top parts had equal 0.75 m length. Top parts were covered by a foil to prevent water evaporation and excessive heat loss. Figure below shows experimental setup. | ||
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| - | Simulations reflected external fluctuation of ambient temperature and casting sequence. During the first simulation, so called blind stage, no experimental results were provided and other parameters of the model were estimated. The second stage calibrated especially heat transfer coefficients and extra induction time to experimental data. Temperature sensors 2, 6, 8 were located on central vertical axis at distances 0.375, 0.775 and 1.125 from bottom. The last two sensors were in the upper part. Figure below displays results from blind and updated stages. | + | Simulations reflected external fluctuation of ambient temperature and casting sequence. During the first simulation, so called blind stage, no experimental results were provided and other parameters of the model were estimated. The second stage calibrated especially heat transfer coefficients and extra induction time. Temperature sensors 2, 6, 8 were located on central vertical axis at distances 0.375, 0.775 and 1.125 m from bottom. The last two sensors were located |
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gallery/temperaturecolumn.1351945621.txt.gz · Last modified: 2012/11/03 13:27 by smilauer