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Automatic Degradation Detection During a Dynamic Loaded Beam Test

Veerman, R. P. and Koenders, E. A. B. (2014):
Automatic Degradation Detection During a Dynamic Loaded Beam Test.
In: CIC 2014: The 1st Concrete Innovation Conference, Oslo, Norway, 11-13 June 2014, [Online-Edition: http://resolver.tudelft.nl/uuid:8242a106-1224-4a53-8b88-7e07...],
[Conference or Workshop Item]

Abstract

The remaining service life of concrete structures strongly depends on the corrosion level of the reinforcement bars. It explains that measuring the corrosion rate is a key issue in monitoring the structural health of concrete structures. A common and appropriate technique used to evaluate the instantaneous corrosion rate of steel reinforcement is by Linear Polarization Resistance (LPR). A dynamic loaded, four-point-bending test on a reinforced concrete (RC) beam was developed to measure dynamic responses and stiffness changes due to corrosion. The test setup can load two beams with a comparable structural behaviour simultaneously, while exposed to the same ambient conditions. To expedite corrosion in one of the beams, a water-chloride solution bath was mounted on top of it. As a reference, a tap water bath was placed on top of the other beam. A wetting cycle of two days wet and five days dry was carried out to simulate real-time situations and to accelerate the corrosion process. During this test, the responses of both beams were measured by Linear Variable Differential Transformers (LVDTs) and results were filed automatically. Furthermore, the corrosion rates of both RC beams were automatically measured by LPR every day. The results of these measurements show differences in corrosion rate between both beams with time. After beam failure, brief forensic engineering was executed to analyse the corrosion of the reinforcement bars. Visual observations show a good correlation with the corrosion behaviour measured by the LPR method.

Item Type: Conference or Workshop Item
Erschienen: 2014
Creators: Veerman, R. P. and Koenders, E. A. B.
Title: Automatic Degradation Detection During a Dynamic Loaded Beam Test
Language: English
Abstract:

The remaining service life of concrete structures strongly depends on the corrosion level of the reinforcement bars. It explains that measuring the corrosion rate is a key issue in monitoring the structural health of concrete structures. A common and appropriate technique used to evaluate the instantaneous corrosion rate of steel reinforcement is by Linear Polarization Resistance (LPR). A dynamic loaded, four-point-bending test on a reinforced concrete (RC) beam was developed to measure dynamic responses and stiffness changes due to corrosion. The test setup can load two beams with a comparable structural behaviour simultaneously, while exposed to the same ambient conditions. To expedite corrosion in one of the beams, a water-chloride solution bath was mounted on top of it. As a reference, a tap water bath was placed on top of the other beam. A wetting cycle of two days wet and five days dry was carried out to simulate real-time situations and to accelerate the corrosion process. During this test, the responses of both beams were measured by Linear Variable Differential Transformers (LVDTs) and results were filed automatically. Furthermore, the corrosion rates of both RC beams were automatically measured by LPR every day. The results of these measurements show differences in corrosion rate between both beams with time. After beam failure, brief forensic engineering was executed to analyse the corrosion of the reinforcement bars. Visual observations show a good correlation with the corrosion behaviour measured by the LPR method.

Uncontrolled Keywords: chemical degradation, corrosion, dynamic load, Linear Polarization Resistance, Structural Health Monitoring
Divisions: 13 Department of Civil and Environmental Engineering Sciences
13 Department of Civil and Environmental Engineering Sciences > Institute of Construction and Building Materials
Event Title: CIC 2014: The 1st Concrete Innovation Conference
Event Location: Oslo, Norway
Event Dates: 11-13 June 2014
Date Deposited: 08 Jun 2015 14:53
Official URL: http://resolver.tudelft.nl/uuid:8242a106-1224-4a53-8b88-7e07...
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