Assessment of mortar evolution in pig slurry by mechanical and ultrasonic measurements

Abstract

Keywords:Ultrasonic velocity Characterization Degradation Fly ash Mortar Pig slurry This work presents the results obtained in a long-term experiment focused on the study of the evolution of cementitious materials immersed in pig slurry at real conditions. Cement mortars were made with four different cement types and immersed in pig slurry for 48 months. Furthermore, to sepárate puré hydration process from pig slurry effect, mortar samples were immersed in water for 12 months at laboratory conditions. Compressive strength, X-ray diffraction and ultrasonic measurements were made in all samples. Ultrasonic measurements were made from ultrasonic images obtained from automatic ultrasonic inspections. Use of ultrasonic images has allowed the extraction of information about the state of the studied materials. An empirical relationship between ultrasonic velocity and compressive strength has been obtained and the long-term effect of pig slurry on cementitious materials has been determined.

Evaluation of freeze–thaw damage in concrete by ultrasonic imaging

“…3 and 4, it can be noted that the velocity is increased in the assessable area. This is because all samples were cured for only 28 days in conditions of low relative humidity; hence, the hydration process was not fully achieved [26,27].…”

Decalcification of cement mortars: Characterisation and modelling

“…In addition to the significance of developing accurate models of these degradation processes, there is a consensus regarding the importance and need for the development of non-destructive techniques to both characterise and monitor cementitious materials. Ultrasonic testing has been used in several works to provide information about cementitious materials and their degradation processes [20][21][22][23][24][25], including decalcification processes [26][27][28][29].…”

Estudio microestructural de pastas de cemento expuestas a medios simulados de agresividad moderada frecuentes en ambientes rurales

“…Este tipo de construcciones está sometido a ambientes agresivos. Siendo de carácter físico, como la abrasión y desgaste superficial de los suelos por las pezuñas o los hocicos de los animales o la exposición a ciclos hielo-deshielo (León et al, 2014) y químico por su contacto con el estiércol y/o purines del ganado, así como otros compuestos, como los ácidos orgánicos, presentes en los productos obtenidos y/o usados en la explotación agro-ganadera (Sánchez et al y 2009Segura et al, 2010).…”