Study of Concrete Quality Assessment of Structural Elements Using Ultrasonic Pulse Velocity Test

Abstract

Ultrasonic Pulse Velocity (USPV) test has gained considerable popularity all over the world.Ultrasonic pulse velocity testing of concrete is based on the pulse velocity method to provide information on the uniformity of concrete, cavities, cracks and defects. The pulse velocity in a material depends on its density and its elastic properties which in turn are related to the quality and the compressive strength of the concrete. It is therefore possible to obtain information about the properties of components by sonic investigations. The investigation reported here is to present study of calibration graphs for Non Destructive Testing (NDT) Equipment, which is ultra sonic pulse velocity test and to study the quality of the concrete in existing structures. These ultra sonic pulse velocity tests were then used to test the quality of the concrete of the various structural elements (columns and beams) of single storied newly under constructed office building. The use of this method produces results that lie close to the true values when compared with other methods. A correlation between ultra sonic pulse velocity test and strength of concrete structure is established, which can be used for strength estimation of concrete structures. The method can be extended to test existing structures by taking direct measurements on concrete elements.

Correlations on Ultra Pulse Velocity and Physical-Mechanical Properties of Cement Mortar Containing Quartz and Recycled-Pp Aggregates

“…A linear relation was identified among the variables. Based on the regression analysis, satisfactory adjustments of the models were evidenced, except for (9), (13) and (19), which exhibited R 2 values close to 60%. This fact can be attributed to the porosity ( ) response variable involved, which is determined using three measures of dry mass ( ), saturated mass ( ) and suspended saturated mass ( ).…”

“…The UPV test has many advantages compared with the conventional non-destructives testing methods, because it is linked to elastic mechanical properties of the test material [11] and changes of ultrasonic pulses parameters can be used to determine the damage and defects in cement based materials [12,13]. Some authors have developed theoretical models for the prediction of physical-mechanical properties of cementitious composites based on UPV measurements [11,[14][15][16][17][18][19][20][21][22][23][24].…”

Detecção de corrosão em concreto armado com termografia infravermelha e ultrassom

“…No CP5 (56 dias) observou-se variação ainda maior da velocidade do concreto e das barras, como também com os outros corpos de prova (CP1 e CP3), devido, principalmente, ao grau de corrosão, que neste caso foi maior, uma vez que os produtos da corrosão e a perda de massa do aço geraram vazios no concreto que impediram a livre propagação da onda, especialmente na barra com maior perda de área de seção transversal. Como é recomendado por outros autores (ALFREDO-CRUZ et al, 2015;AGGELIS et al, 2010;GUCUNSKI et al, 2013;KEE et al, 2012;OH et al, 2013), a combinação dessas técnicas analíticas permite lograr melhor detecção de problemas no concreto armado; a termografia pode localizar as barras com maior grau de corrosão, e o ultrassom pode caracterizar melhor o grau do dano em relação a outras áreas do mesmo concreto. Não obstante, como descrito, a combinação é mais sensível para estágios já avançados de corrosão.…”

“…Apesar das vantagens e capacidades da termografia e do ultrassom para a inspeção, ainda existem incertezas quanto a sua aplicação específica na detecção de alguns problemas do concreto armado, entre eles a corrosão (GEHLOT et al, 2016;WASHER;FENWICH;BOLLENI, 2009;WASHER, 2012;KEE et al, 2012;GUCUNSKI et al, 2013;WATASE et al, 2015;VAGHEFI et al, 2015), uma vez que há poucos trabalhos que tratam dessa temática. Na atualidade existem poucas normas que regem a execução desses ensaios com relação à corrosão.…”

Experimental Studies on the Homogeneity and Compressive Strength Prediction of Recycled Aggregate Concrete (RAC) Using Ultrasonic Pulse Velocity (UPV)

“…The main purpose of NDT is to test concrete properties in-situ without damaging the concrete structure. The NDT method has been widely applied in concrete studies such as in the use of Ultrasonic Pulse Velocity (UPV) or ultrasonic wave velocity which is then used to determine the quality of the concrete structures (Gehlot et al, 2016;Güneyli et al, 2017;Karaiskos et al, 2015;Majeed & Khalaf, 2018;Rao et al, 2016;Yap et al, 2013). Nevertheless, the wave propagation measurements are affected by the characteristics of the concrete mixtures which can lead to difficult interpretations (Benaicha et al, 2015;Karaiskos et al, 2015;Saint-Pierre et al, 2016).…”