Technologies for Improving the Evaluation and Repair of Concrete Bridge Decks PDF Download
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Author:
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 294
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Author:
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 294
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Book Description
Author: Stephen R. Sharp
Publisher:
ISBN:
Category : Concrete bridges
Languages : en
Pages : 38
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Book Description
This study investigated the use of penetrating corrosion inhibitors to extend the life of existing reinforced concrete bridge decks. The use of assisted (vacuum/pressure injection) and unassisted (diffusion) treatment methods and two inhibitors were evaluated. The inhibitors were FerroGard 903, from Sika Corp., and TPS-II, from Surtreat International. Testing was performed on exposure slabs with 15 lb/yd3 of NaCl in the top layer and no NaCl in the bottom layer. The slab design was a variation of the specimen design provided in ASTM G109, with each slab containing nine steel reinforcing rods instead of three. The exposure slabs had either a uniform cover over the top pieces of steel or an inclined cover over the steel. TPS-II was also evaluated on the deck of a bridge in Orange County, Virginia. The study found that when applied to the concrete surface, neither inhibitor penetrated the concrete to reach the steel reinforcement. The vacuum/pressure injection method showed promise but requires refinement. In addition, based on macro-cell measurements, a sufficient quantity of inhibitor can be injected into the concrete to reduce the charge passed.
Author: Ali Akbar Sohanghpurwala
Publisher: Transportation Research Board
ISBN: 0309098629
Category : Bridges, Concrete
Languages : en
Pages : 72
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Author: Michael G. Grantham
Publisher: CRC Press
ISBN: 0203931408
Category : Technology & Engineering
Languages : en
Pages : 324
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Book Description
Concrete is an inherently complex material to produce and an even more complex material to repair. With growing pressure to maintain the built environment, and not simply to demolish and rebuild, the need to repair concrete buildings and other structures is increasing and is expected to become of greater importance in the future. This straightforward book serves as a practical guide to engineers on the processes to be followed in commissioning a concrete repair. It stresses the need to fully understand the cause, extent and location of the problem, by appropriate insitu and laboratory testing. And it outlines the steps to a successful repair. It includes sections on the different repair techniques, giving good practical advice as to where and when to use them, and the warns of the pitfalls of their incorrect use. It also includes an up-to-date guide on the current standards for repair, and provides a good bibliography on other sources of information and books on the various techniques.
Author: Michael M. Sprinkel
Publisher:
ISBN:
Category : Epoxy coatings
Languages : en
Pages : 58
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Book Description
One hundred and fifty-six exposure slabs have been constructed with and without a variety of combinations of corrosion inhibiting admixtures and topically applied inhibitors. To accelerate corrosion one hundred and thirty-six of the slabs were constructed with concrete that surrounded the top mat of reinforcement with chloride contents of 3,6, 10, and 15 Ib/yd3 (1.8,3.5,5.9, and 8.9 kg/m3). This paper presents the results from measurements made on the slabs in May 1998 after approximately 1 year of exposure. The measurements show that as the chloride ion content in the slabs increases, the macrocell current, macrocell potential, half-cell potential, and rate of corrosion increase and the resistance decreases. Macrocell currents exceed 10 uA, indicating corrosion activity, in slabs cast with chloride in the concrete except those with 3 Ib/yd3 (1.8 kg/m3 ) of chloride that were overlayed and patched or patched. Measurements taken to determine the rate of corrosion indicate high, moderate, low, and passive states of corrosion in 63,22, 12, and 3 percent, respectively, of the slabs. The measurements also show no significant difference between the slabs repaired with and without corrosion inhibitor admixtures and topical treatments. Slabs repaired with 7% silica fume showed half-cell potentials that were less negative than those repaired without silica fume.
Author: Marios Soutsos
Publisher: Emerald Group Publishing
ISBN: 0727763768
Category : Technology & Engineering
Languages : en
Pages : 577
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Book Description
ICE Handbook of Concrete Durability, second edition is a comprehensive practical reference for professionals involved in design and maintenance of concrete structures of all types. It is an invaluable guide for construction professionals, including design engineers, consultants and contractors, as well as postgraduate students.
Author:
Publisher:
ISBN:
Category : Highway research
Languages : en
Pages : 264
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Book Description
Author: FIB – International Federation for Structural Concrete
Publisher: FIB - International Federation for Structural Concrete
ISBN: 2883940401
Category : Technology & Engineering
Languages : en
Pages : 191
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Author:
Publisher:
ISBN:
Category : State government publications
Languages : en
Pages : 216
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Author: American Concrete Institute
Publisher:
ISBN:
Category : Concrete
Languages : en
Pages : 1196
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