Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Assessment of Corroded Rock Bolts with Pulse Echo Tests
Visual inspection of rock bolts could give some indications on their condition and performance. However, it might be misleading because most of the rock bolts are embedded in concrete or grouted in rock mass. Nondestructive methods have to be used for a proper diagnosis of the condition of rock bolts. This study deals with the determination and the location of the corrosion in rock bolts embedded in concrete using a pulse-echo test. Complementary tests were performed using an acoustic emission (AE) test, and measuring the mass loss from corrosion current. Pulse-echo test results showed that a decrease of the energy of the back echo and the trailing wall echo is indicative of the corrosion state. This method enables locating the flaws associated with the corrosion of rock bolts by the calculation of the normalized energy ratio between the echoes coming from the threads of healthy and corroded rock bolts. Results of acoustic emission and imposed electrochemical potential provide information on the corrosion initiation. This research indicates that the pulse-echo is an effective measurement technique for corrosion detection.
Assessment of Corroded Rock Bolts with Pulse Echo Tests
Visual inspection of rock bolts could give some indications on their condition and performance. However, it might be misleading because most of the rock bolts are embedded in concrete or grouted in rock mass. Nondestructive methods have to be used for a proper diagnosis of the condition of rock bolts. This study deals with the determination and the location of the corrosion in rock bolts embedded in concrete using a pulse-echo test. Complementary tests were performed using an acoustic emission (AE) test, and measuring the mass loss from corrosion current. Pulse-echo test results showed that a decrease of the energy of the back echo and the trailing wall echo is indicative of the corrosion state. This method enables locating the flaws associated with the corrosion of rock bolts by the calculation of the normalized energy ratio between the echoes coming from the threads of healthy and corroded rock bolts. Results of acoustic emission and imposed electrochemical potential provide information on the corrosion initiation. This research indicates that the pulse-echo is an effective measurement technique for corrosion detection.
Assessment of Corroded Rock Bolts with Pulse Echo Tests
Billeh Ishak Medfouni, El Moetezz (Autor:in) / Kodjo, Apedovi Serge (Autor:in) / Rivard, Patrice (Autor:in) / Saleh, Kaveh (Autor:in) / Quirion, Marco (Autor:in)
09.03.2017
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
Assessment of Corroded Rock Bolts with Pulse Echo Tests
| Online Contents | 2017
| Engineering Index Backfile | 1954
Experimental Study on Bonding Mechanism between Corroded Bolts and Grout
| Trans Tech Publications | 2007
Experimental Study on Bonding Mechanism between Corroded Bolts and Grout
| British Library Online Contents | 2007