Statistical analysis of test data of casting temperature of cast-in-situ concrete based on field monitoring results
The casting temperature has a great influence on the development of early performance of concrete,and the higher the casting temperature is,the worse the cracking risk of structural concrete will be.Based on the field monitoring data of the casting temperature of more than 200 cast-in-situ concrete casting sections of more than 20 engineering projects in recent years by the author's research team,which covers different seasons and different structural forms,it removes the data sets of artificially controlled casting temperature,conducts statistical analysis of the remaining 197 sets of casting temperature data.The results show that the test data of the molding temperature conforms to the normal probability distribution,and has a strong linear correlation with the ambient temperature,and the difference between casting temperature and with the ambient temperature also conforms to the normal probability distribution.The fitting calculation formula of the difference between them is given,whose R2 is more than 0.98,so the real-time casting temperature can be estimated according to the fitting formula and the ambient temperature.The analysis results can provide some guidance for the prediction of the casting temperature in the construction organization and the selection of the casting temperature in the pre-evaluation of the concrete crack resistance.
万方数据
维普
