Naslov
Compressive strength of calcium aluminate mortar determined by ultrasonic non-destructive test method

Autori
Šipušić, Juraj ; Ukrainczyk, Neven ; Vrbos, Nevenka

Izvornik
Advances in cement research (0951-7197) 25 (2013), 3; 143-154

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
non-destructive testing ; calcium aluminate cement ; compressive strength ; hydration ; modulus of elasticity

Sažetak
The early-age hydration of a number of calcium aluminate cement pastes and mortar materials was investigated using compressive strength and ultrasonic through-transmission measurements. Ultrasonic signals obtained were successfully described in the temporal domain by a single Gaussian wave packet equation giving five characteristic parameters – amplitude A, angular frequency ø, phase shift, wave centre arrival time and signal width. The group velocity of ultrasonic wave propagation (vG) is suggested to be a more sound parameter characterising the material under study than the generally employed ultrasound velocity determined from the ‘time of flight’ parameter. The combination of parameters AørvG showed a linear correlation with the measured compressive strengths for all the samples tested. The physical meaning of the AørvG group of parameters is given and its application is further discussed in relation to other testing procedures.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Građevinarstvo, Kemijsko inženjerstvo

POVEZANOST RADA