Accelerating the hardening of concrete using the controllable thermos technology - QuickField simulation example
The reinforced concrete foundation slab (4x6x1.2 m) with initial temperature of +10 °C is laid on the frozen ground (slab - concrete, base - sand, bedding - soil).
How to find temperature evolution during concrete curing?
Answer Typical applications Geometry
Given Task Results During the calculation period the concrete temperature doesn't drop below 0°C. Heating rate doesn't exceed of 5 °C/hour.Engineering question
Set up a plane-parallel QuickField Transient Heat Transfer problem for concrete curing systems and evaluate temperature evolution from computed field results.
concrete slabs, winter concreting systems, heated concrete structures
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Simulation problem
Problem Type
Plane-parallel problem of Transient heat transfer.
Slab initial temperature Tslab = +10 °C
Soil temperature Tsoil = -5 °C
Air temperature Tair = -10 °C
Convection coefficient is 23 W/K-m²
Soil freezing depth is 1.3 m.
Planned hardening time is 1 week.
Resistance of the heating cables is constant.
Exothermic heat of the concrete Q = f(time, temperature)[W/m³] - a function of time under the average expected temperature.
Calculate temperature distribution in the slab during the hardening.
Temperature difference between the center and the surface of the slab is about 20°C in average, which is within the project requirements.
After 4 days the temperature in the center of the slab reaches its peak value of 47°C.
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