Design and Application of Intelligent Spray Curing System for Precast Concrete Girders
An intelligent spray curing system that overcomes the drawbacks of traditional curing methods is presented,which consists of multiple constituent subsystems,including the water supply system,intelligent control system,water resource recycling system,IoT remote control cloud platform and spraying units.The system is able to calculate the humidity of the curing surfaces of the precast girders,difference between girder core temperature and ambient temperature,and the spraying time intervals,in accordance with the concrete hydration heat release behavior,the ambient temperature and humidity,wind velocities and girder core temperatures collected by the wireless sensor network,and to achieve the spray curing of the precast girders following a feedback control strategy.The curing water and rainwater that is not absorbed can be treated and recycled in the water resource recycling system through a four-stage precipitation recovery process.Based on the 5G remote control cloud platform,an intelligent spray curing management platform is developed under the MQTT protocol.The system has been applied to numerous girder fabrication yards.The data in the Yuanyang girder fabrication yard for the Zhengzhou-Jinan Railway show that the surface humidity of precast girders is no less than 95％,the difference between girder core temperature and ambient temperature does not exceed 15 ℃,the standard concrete blocks at day 10 can reach design strength,indicating that the intelligent spray curing system performs better than the traditional methods and meets the intelligent curing requirements of the girder fabrication yard.
万方数据
维普
