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The paper presents a method for testing the shrinkage of concrete beams with dimensions of 10x10x50cm. Measurements followed from setting into the form until 24 hours after setting. It was used modified TLS system, which originally was meant for the determination of changes in the length of thin-mortar. Simultanously measured were the changes of speed propagation of sound waves by Vikasonic, what allows to specify the setting time of binders. It could be a base for determining the scratch resistance of the concrete in the first 24 hours after casting

transactions of the všb technical university of ostrava. civil engineering series/sborník vědeckých prací vysoké školy báňské-technické univerzity ostrava. řada stavební

Laser System for Testing Early Shrinkage of Concrete Elements in Conjuction with the Deterioration of the Setting Time