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Temperature affects the rate of hydration of concrete. The higher the air temperature is, the higher will be the rate of hydration reaction. Consequently, fresh concrete tends to set at a faster rate. The pressure exerted on formwork decreases with an increase in temperature. F...
Nonetheless, Styrene butadiene latex can coagulate if heated for too long at too high a temperature. Styrene butadiene latex, like acrylic latex, is a milky white color and can have a solid percentage of up to 55%. They are useful for adhering new concrete to preexisting slabs or sealing ...
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with chilled water and chilled mixing water will reduce concrete tempera- ture by 10 to 22 degrees.Coarse aggregate cooling with chilled air. You can cool coarse aggre- gate by blowing mechanically chilled air up through specially designed bins. Capital costs are typically more than those fo...
What physical phenomena can be neglected when modelling concrete at high temperature? A comparative study. Part 2: Comparison between models Schrefler, What physical phenomena can be neglected when modelling concrete at high temperature? A comparative study. Part 1: Physical phenomena and ... Gawin...
Second, redlined neighborhoods have a higher temperature occurrence than other neighborhoods in the same city. This is due to buildings and asphalt magnifying heat, a phenomenon known as the urban-heat-island effect. The third impact from redlining and historical practices is that redl...
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Concrete’s workability and cohesion are preserved by retarding admixtures, which also lengthen the time it takes to set. The use of concrete retarders can mitigate the dangers of long-distance delivery in hot weather by offsetting the hastening effect of high temperature on the initial setting ti...
What physical phenomena can be neglected when modelling concrete at high temperature? a comparative study. Part 1: physical phenomena and mathematical model. International Journal of Solids and Structures, in print.D. Gawin, F. Pesavento, B. Schrefler, What physical phenomena can be neglected when...