Concrete rehabilitation

The concrete rehabilitation materials for non-electrochemical techniques can then be listed and the required properties selected from Table A-1 in the informative annex to EN1504-9. This lists tests to achieve the required characteristics (bond strength, shrinkage, elasticity, strength, etc.) from EN1504 parts 2 to 7. 

Lau K T, Zhou L M, Tse P C and Yuan L B (2002), Applications of composites, optical fibre sensors and smart composites for concrete rehabilitation An overview , Appl Compos Mater, 9(4), 221-247. 

Figure 13.23 Embedded zinc anodes used in concrete rehabilitation to prevent the formation of new corrosion sites adjacent to completed patch repairs. (Courtesy of Vector Corrosion Technologies)...

To be able to guarantee the durable and rehable repair of structural concrete, three main fundamental requirements of a concrete rehabilitation system must be fulfilled simultaneously ... 

Federal Highway Authority (USA), Cost Effective Concrete Construction and Rehabilitation in Adverse Environments, Project No. 4K, Annual Progress Report, Sept. (1981)... 

Asarco tested components of sulfur concrete, both precast and poured in place, in corrosive environments of sulfuric acid. Favorable endurance of these samples led to a full-scale cooperative demonstration project. The project selected was the rehabilitation of an electrolytic zinc cellhouse basement floor of approximately 21,000 square feet. 

After 1- years, the Portland cement concrete control samples at Corpus Christi that were installed contiguous to and intermixed with the sulfur concrete test samples showed total disintegration, whereas the sulfur concrete exhibited no identifiable attack (figure 2). In the summer of 1979, the ongoing maintenance needs at the Corpus Christi plant placed rehabilitation of a cellhouse basement floor in a priority position. The opportunity to perform the repair work on a full-scale basis, utilizing Bureau of Mines technology for sulfur concrete in lieu of portland cement concrete, was accomplished by an agreement for a demonstration project executed between the Bureau of Mines and Asarco. 

Construction. Polymeric materials such as adhesives, sealants, and composites have been used considerably in the last several decades for the construction, repair, and rehabilitation of our transportation infrastructures. Even though most processes were experimental until recently, they have evolved to the point where many are now standardized and well accepted. Table 1.6 hsts several common applications for advanced polymeric materials (as well as the polymeric resins that are most commonly employed). In the construction or repair of roads and bridges, epoxy adhesives have primarily been used for bonding concrete and for bonding stiffening members or repair structures to degrading concrete facilities. 

Repair and rehabilitation New repair methods New repair materials and applications technologies Self-repairing concrete... 

Dinitz, A. M., The Use of Polymer Concrete Materials for Construction, Maintenance, Rehabilitation, and Preservation of Concrete and Steel Orthotropic Bridge Decks, http //media.brintex.com/Occurrence/21/Brochure/678/brochure.pdf. 

The majority of concrete structures that require strengthening or rehabilitation are exposed to severe environmental conditions. Many of these severe circumstances are the result of cold... 

Electrical current flow by ion migration in concrete is important for electrochemical rehabilitation techniques such as chloride removal (Chapter 20), but also for (macrocell) corrosion processes (Chapter 8). 

R. B. Polder, Cathodic protection of reinforced-concrete stmctures in the Netherlands — experience and developments , in Corrosion of Reinforcement in Concrete - Monitoring, Prevention and Rehabilitation, Papers from Eurocorr" 97, J. Mietz,... 

Proc. RILEM Conference Rehabilitation of Concrete Structured, 403-407, [12]... 

P. Pedeferri, L. Bertolini, F. Bolzoni, T. Pastore, Behaviour of stainless steels in concrete , in Repair and Rehabilitation Reinforced Concrete Structures the State of the Art,... 

D. McDonald, D. Pfeifer, P. Virmani, Corrosion resistant reinforcing bars - findings of a 5-year study , Int. Conf on Corrosion and Rehabilitation of Reinforced Concrete Structures, Federal Highway Administration, Orlando, 7-11 December 1998 (CD ROM). 

CSIRO Int. Conf. on Rehabilitation of Concrete Structures, Melbourne,... 

Symp. on Condition Assessment, Protection Repair and Rehabilitation of Concrete Bridges Exposed to Aggressive Environments, ACI Ball Convention, Minneapolis, 1993. 

Research Products Related to Methodology for Concrete Removal, Protection and Rehabilitation, Wilbur Smith Associates, Falls Church, June 1996. 

Cathodic protection of reinforced-concrete structures exposed to the atmosphere was apphed for the first time to bridge decks contaminated by de-icing salts by R. F. StratfuU in California in 1973 [1,2]. In the years following, design and protection criteria were elaborated, as well as power supply and monitoring systems completely different from those used for cathodic protection of buried steel structures or structures operating in seawater. Above all, it was proved that cathodic protection was a rehable repair technique even in the presence of high chloride contents, where traditional systems of rehabilitation are inefficient or very costly. 

G. Sergi, C. L. Page, Advances in electrochemical rehabilitation techniques for reinforced concrete ,... 

J. Mietz, Electrochemical rehabilitation methods for reinforced-concrete structures - A state of the art report , European Federation of Corrosion Publication number 24, lOM Communications, London, 1998. 

R. B. Polder, H. J. van den Hondel, Electrochemical realkalization and chloride removal of concrete , Proc. of the Int. RILEM/CSIRO/ACRA Conference Rehabilitation of Concrete Structures, D. W. S. Ho,... 

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