Ortega, José Marcos, Miró, Marina, Ibáñez Gosálvez, Javier Francisco, Tenza-Abril, Antonio José
Non-destructive evaluation of the effects of exposure environment in mortars using non-linear ultrasonic measurements
Developments in the Built Environment. 2023, 14: 100142. https://doi.org/10.1016/j.dibe.2023.100142
URI: http://hdl.handle.net/10045/132671
DOI: 10.1016/j.dibe.2023.100142
ISSN: 2666-1659
Abstract: 
The development of non-destructive techniques has currently a high interest, such as those based on non-linear ultrasonic measurements. In this work it has been assessed the possible application of non-linear ultrasonic measurements for getting information related to the microstructure and properties of Portland cement mortars exposed to real and non-optimum environments. The pore structure was studied using mercury intrusion porosimetry and differential thermal analyses. Mechanical strengths and linear ultrasonic pulse velocity were determined. Regarding non-linear ultrasonic measurements, the results of parameters R and DIFA were analyzed. The tests were performed at 28 and 250 days. At later ages, a loss of microstructure refinement and a worsening of mechanical performance of the mortars were observed. The results of non-linear ultrasonic parameters R and DIFA overall agreed with those obtained for the microstructural and mechanical characterization performed. In particular, an adequate correlation between parameter DIFA and the pore size distributions was observed.
Keywords:Non-linear ultrasonic test, Non-destructive characterization, Real environment, Non-optimum condition, Microstructure
Elsevier
info:eu-repo/semantics/article