Continuous monitoring of early-age properties of sprayed mortars by in situ ultrasound measurements

The development of early age properties sprayed concrete is a key factor that governs its mix design and safe application. conventional methods to evaluate the evolution mechanical strength in present large interval between each set measurements results high scatter. In this context, objective study characterize mortars through novel continuous monitoring system based on situ ultrasound measurements. Sprayed were also analyzed by isothermal calorimetry, needle penetration stud driving method. Results indicate developed here can monitor continuously without common drawbacks observed tests. This research may lead more reliable procedure materials worksite under safer conditions.