Research Project Work Plan for a Corrosion Monitoring System for Existing Reinforced Concrete Structures
Author | : Xianming Shi |
Publisher | : |
Total Pages | : 19 |
Release | : 2011 |
Genre | : Chemical detectors |
ISBN | : |
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Author | : Xianming Shi |
Publisher | : |
Total Pages | : 19 |
Release | : 2011 |
Genre | : Chemical detectors |
ISBN | : |
Author | : Xianming Shi |
Publisher | : |
Total Pages | : 0 |
Release | : 2015 |
Genre | : Chemical detectors |
ISBN | : |
This study evaluated a multi-parameter corrosion monitoring system for existing reinforced concrete structures in chlorideladen service environments. The system was fabricated based on a prototype concrete corrosion measurement system that had been built and patented by Southwest Research Institute (SwRI). In a laboratory benchmark test, a chloride concentration vs. potential calibration curve was established and indicated good linearity between 0.01 mol/L and 1 mol/L. The general and maximum localized corrosion rates, as measured by the Multielectrode Array Sensor (MAS) probe, were all sensitive to the incremental chloride concentration in a simulated pore solution. However, once active corrosion is initiated and a great amount of chloride is present, the MAS probe may no longer serve as a good tool to predict the corrosion rate of rebar unless more research is conducted to establish such prediction or correlation. It was also revealed that in a sensor longevity test, only a fraction of sensors can be considered reliable after eight accelerated weathering cycles. In addition, a laboratory pilot-scale test was done by incorporating an array of three sensing units at different depth of a mortar cylinder to monitor the ingress of chloride and the corrosion rate of rebar at different depths. The results identified many challenges to improve the sensor probe. A detailed guideline along with video documentation was developed as a reference to guide field implementation. A field deployment of the system in an ODOT bridge pier was attempted for a few months. However, future research into improvements of the sensor system is needed to achieve a successful field application.
Author | : National Cooperative Highway Research Program |
Publisher | : |
Total Pages | : 298 |
Release | : 1996 |
Genre | : Highway research |
ISBN | : |
Author | : Yunping Xi |
Publisher | : |
Total Pages | : 166 |
Release | : 2004 |
Genre | : Concrete bridges |
ISBN | : |
Corrosion of reinforced concrete structures has been a significant problem for many state and transportation agencies since the application of deicing salts was introduced. Much research has been conducted to develop corrosion protection systems that can prolong the life span of reinforced concrete structures. The Colorado Department of Transportation (CDOT) has several routine and experimental measures to prevent corrosion of the rebar including epoxy-coated rebar, calcium nitrite admixture, organic corrosion inhibitors, a thick cover of quality concrete, and a waterproofing membrane covered by an asphalt overlay. An extensive literature review was performed to collect information on various corrosion protection systems that have been used in the U.S. and around the world. Current CDOT practices in terms of corrosion protection measures were reviewed. A draft inspection plan for Colorado's bridge structures was proposed.
Author | : National Cooperative Highway Research Program |
Publisher | : |
Total Pages | : 356 |
Release | : 1979 |
Genre | : Highway research |
ISBN | : |
Author | : James Lawrence Withiam |
Publisher | : Transportation Research Board |
Total Pages | : 142 |
Release | : 2002 |
Genre | : Anchorage (Structural engineering) |
ISBN | : 0309067626 |
Author | : Southwest Research Institute |
Publisher | : CRC Press |
Total Pages | : 720 |
Release | : 2008-02-19 |
Genre | : Business & Economics |
ISBN | : |
Corrosion monitoring technologies are a vital step in efforts to combat corrosion, which can have major economic and safety implications. This important book provides a comprehensive analysis of the range of techniques for corrosion monitoring, including practical applications and case studies. It reviews electrochemical techniques for corrosion monitoring, such as polarization techniques, potentiometric methods, harmonic analysis, galvanic sensors and multielectrode systems. Case studies discuss the ways that corrosion monitoring can be applied to engine exhaust systems, cooling water systems, pipelines and equipment in chemical plants.
Author | : |
Publisher | : |
Total Pages | : 990 |
Release | : 1979 |
Genre | : Aeronautics |
ISBN | : |
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.