IoT-Web-Based Integrated Wireless Sensory Framework for Non-destructive Monitoring and Evaluation of On-Site Concrete Conditions

This research combines the use of IoT-web-based application in monitoring the real-time conditions of concrete, to accurately evaluate the maturity of concrete samples from its fresh state, accurately predict the strength of concrete among other properties, and it provides remote access to the outputs in real-time. The predicted strength of concrete was acquired using various maturity functions based on the temperature-time history of concrete samples. Two cement types of fresh concrete were prepared, ordinary portland cement (OPC) and blast furnace slag (BB) cement, at water-cement ratio 50%. Immediately, after fresh concrete samples were cast into molds and well vibrated, the monitoring of internal average temperature commenced, and these specimens were kept under controlled curing condition over a 28-day period, and the temperature data were logged directly into the database by the IoT sensors via a mobile internet hotspot connection. Graphical outputs of temperature, concrete maturity and strength data for both concrete types were monitored remotely; presented on the programmed web-based application and was accessible for download on any internet-connected device.