Temperature Field of Concrete Cured in Winter Conditions Using Thermal Control Measures

In order to obtain the construction technology of concrete construction at extreme low temperature and ensure the construction quality of concrete in winter, this study investigated the temperature field and compressive performance of concrete specimens cured in the laboratory at a temperature of −10°C using different thermal control measures. A finite element model of the observed temperature field was then established and shown to be in good agreement with the test results. This model was applied to analyse the factors influencing thermally controlled low-temperature concrete curing in winter. The results showed that concrete cast at −10°C using rock wool insulation covering and heated formwork for thermal control met the relevant performance requirements. Finally, the proposed temperature field model and thermal control measures were successfully applied to the construction of a concrete box girder in winter conditions.