20.500.12556/RUL-32308 Measurement of setting process of cement pastes using non-destructive ultrasonic shear wave reflection technique In this paper a new setup for measuring, setting and hardening process of cementitious materials, using a non-destructive ultrasonic shear wave reflection technique and design with the objective to be easily used in-situ, is described. Using the developed setup, the measurements can be performed by slight deepening of a measuring head into a paste in a mold or by placing the paste into a mold fixed on a measuring head. To test the proposed methodology, cement pastes with different compositions were prepared and exposed to different curing temperatures. Significant differences in the evolution of a change of a shear wave reflection coefficient Δr in time were observed, indicating the ability of the method to monitor setting process of cement pastes. Moreover, some interesting phenomena in the solidification process of the materials can be identified. A linear relationship between development of Δr and penetration resistance dP values in time was found, allowing development of a simplified procedure to determine both initial and final setting times of the material. cement paste ultrasonics shear wave setting wave reflection method cementna pasta ultrazvok strižni valovi vezanje cementa metoda odboja valov true false false Elsevier Angleški jezik Angleški jezik Neznano 2015-07-10 10:14:23 2015-07-10 10:14:23 2022-11-21 15:59:21 0000-00-00 00:00:00 2013 0 0 Str. 65-75 Letn. 56 Letn. 56 2013 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 532:691 0963-8695 10.1016/j.ndteint.2013.02.004 6202721 12515845 Trtnik_Valic_Turk_ndte_2013.pdf Trtnik_Valic_Turk_ndte_2013.pdf 1 7817524C3540D3B4F5292C085FB4FE84 5e9ecb6d92cfd1753b9980a372f5ae0b9b8ed85ca6519952950ee0fa751c9138 1bec4496-a1ae-11eb-a523-00155dcfd717 20.500.12556/rul/0675a978-0854-4bb9-b67d-8156fbfc460d https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=85814 Fakulteta za gradbeništvo in geodezijo 0 0 0