An optical measurement system for monitoring of concrete curing

Prefabricated concrete has gained significant popularity in the construction industry due to advantages, including cost-effectiveness, reduced construction time, and enhanced quality control. The curing process of prefabricated concrete elements is particularly crucial as it determines their strength development, durability, and overall quality. In this study, we present our work on the development of an optical measurement system for the monitoring and optimization of the prefabrication process. We compare multispectral camera-based methods with the application of multispectral laser scanners in wavelength regions covering the visible and near infrared spectrum. Based on our measurements, we discuss the pros and cons of the investigated setups to monitor the surface of the concrete elements and capture precise and continuous data on the hydration. We further evaluate the possibility to derive process parameters from it such as the ideal time for dismantling of formwork. The remote monitoring capability of our proposed system could enable real-time data acquisition and analysis, allowing to improve the prefabrication process.