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handicapped in the early days by a lack of suitable high strength materials. Its real ... 1.4 Plastic Ducts for Bonded Post-Tensioning Tendons. 8 ... protection of post-tensioned ... b) Tendon corrosion in incompletely filled tendon ducts ... of systematic investigations into ...... 5: Effect of water / cement ratio on bleed at 3 hours.
[ PT_Grouting_Tendons.pdf - Read/Download File

repairs, modifications, and strengthening with post-tensioning
Jul 2, 2006 ... Strengthening structures with post-tensioning tendons can ... undertaking any repairs, a thorough investigation should ... corrosive agents and their affect on steel has caused the .... 1 – Evolution of Corrosion Protection for Unbonded ..... vation is filled in after tensioning and approval of stressing records by ...
[ Repairs, Modifications, and Strengthening with Post-Tensioning, PTI Journal, July 2006.pdf - Read/Download File

T5140.33 - Federal Highway Administration - Department of
Nov 12, 2013 ... Performance of Post-Tensioned Bridges having Tendons. Installed with ..... Duct with filling material providing durable corrosion protection.
[ t514033.pdf - Read/Download File

General Notes (Post-tensioning):
Post-Tensioned Concrete Haunched Slab Bridge User's Manual .... investigation regarding prestress losses, movement at the abutments, etc. .... The shortening of the slab at the abutments due to the combined effect of dead load, live ..... On many bridges, the grout fill material of the transverse tendons is breaking apart and.
[ PT_Slab_Users_Manual_English-V05_Final.pdf - Read/Download File

Post-Tensioning Technologies - Purdue e-Pubs - Purdue University
post-tensioned bridge construction in Indiana and (2) to provide the State with ... efficient use of construction materials; the post-tensioning system ..... The initial investigation by WJE was conducted after ... and verify the findings obtained from the impact-echo. ..... stressed beams, poor care was given to the protection of.
[ 19095764.pdf - Read/Download File

Corrosion risk of bonded, post-tensioned concrete elements - PCI
Corrosion protection for bonded, internal, post-tensioning tendons ... that investigate the material properties required to ... The long-term beam corrosion test series examined the effects ..... investigation were selected based on a survey of relevant literature ...... due to entrapped air, bleed water, incomplete grout filling, or a.
[ JL-08-January-February_Corrosion_Risk_of_Bonded_Post-Tensioned_Concrete_Elements - Read/Download File

effect of the presence of various types of post-tensioning ducts on the strength of the ... investigation of the effect of web cracking on the ultimate strength. The presence of ... whether the duct is left empty, filled with a soft material such as grease, or filled ... sary to completely protect the post-tensioning system from corrosion.
[ Muttoni06a.pdf - Read/Download File

fdot grouted pt inspection findings and future direction
post tensioned bridges built with new protection strategies. • Bridges built prior to 2001 not ... Impact Echo. - Sounding ... During the field investigation, FDOT State Materials Office .... Visited two bridge sites utilizing wax filled tendons. • Met with ...
[ T-9_3_Jeff Pouliotte_Post-Tensioning Corrosion and Grouting - Florida DOT.pdf - Read/Download File

vsl post-tensioning solutions -
Generally the use of VSL Post-tensioning delivers the maximum cost-benefit for a project and has as well a beneficial impact on its sustainability and .... tight tendon encapsulation with a cementitious grout or other protection ..... investigation ... In any case the filling ratio (cross-section steel / duct) must not exceed 0.5 ...
[ download.php?brochure_cat=post-tensioning-strand-systems&getfile=vsl-post-tensioning-solutions.pdf - Read/Download File

Corrosion of Post-Tensioning Strands in Ungrouted Ducts - Scholar
Master of Science in Materials Science and Engineering ...... assemblies are fitted with multiple 7-wire steel strands and ducts are subsequently filled .... The estimated corrosion protection of post-tensioned concrete structures is ... investigations into failure of PT tendons which are grouted whereas little research has.
[ viewcontent.cgi?article=6101&context=etd - Read/Download File

Integrity assessment of grouted posttensioning cables and
In the year 2000, a field investigation was conducted as part of a condition assessment and corrosion was detected in some of the grouted post-tension cable strands. ... forensic examination and destructive testing to determine the impact of ageing and corrosion. .... The material filling the cracks was identified optically.
[ epjconf_amp2010_02002.pdf - Read/Download File

Identifying Grouting Problems on Post-Tensioned Bridges
have sometimes used a method called post-tensioning, ... significantly improved their grouting methods and began using a grouting material not susceptible to bleeding. ... more detailed investigation of grouting in post-tensioned bridges. Produced by ... Ideally the grout would completely fill the duct, protecting strands from.
[ 201209TS.pdf - Read/Download File

faq No 6:FAQ.qxd - Post-Tensioning Institute
the post-tensioning material fabricator, dreads this like a swift kick in the ... gets on everything) that is applied to protect the steel from corrosion .... in the stressing operation and that this will adversely affect .... has not been filled out with the tendon numbers and required .... of tolerance would require further investigation.
[ FAQ no. 6.pdf - Read/Download File

An investigation of tendon corrosion-inhibitor leakage into - OSTI
provide corrosion protection. ... Prestressing Tendon Sheathing Filler Materials ... Although a review of literature identified several articles on effects of organic- based ... The Trojan Plant containment is a post-tensioned concrete structure in the ...
[ 6567.pdf - Read/Download File

Feasibility of Cathodic Protection in Grouted Post Tensioned Tendons
Feasibility of Cathodic Protection in Grouted Post Tensioned Tendons - Exploratory Model ... Master of Science in Materials Science and Engineering ..... the inside of a notional six strand duct filled with grout where the central location, that would ..... Further investigations will include examination of the projected effect of.
[ viewcontent.cgi?article=7114&context=etd - Read/Download File

State of the Art Externally Post-Tensioned - Research Library
detailed investigation of deviator design and briefly describes development of a ... concrete box girder bridges with post-tensioning tendons external to the .... of the tendon, and, if the ducts are completely filled with a dense grout, ..... The bituminous material which had been applied for tendon protection (and reapplied in.
[ 365-1-CTR.pdf - Read/Download File

corrosion guidelines - Caltrans - California
The contents of this document reflect the views of Materials Engineering and ... Corrosion and Structural Concrete Field Investigation Branch ... PRINCIPLES OF CATHODIC PROTECTION . ...... affect corrosion of metals in soil by affecting the factors listed above. ... Presence of on-site fill material. ..... not post-tensioned.
[ 2012-11-19-Corrosion-Guidelines.pdf - Read/Download File

New Directions for Florida Post-Tensioned Bridges
Feb 15, 2002 ... as materials for enhanced post-tensioning systems, plan sheet ... detailing practices for watertight bridges and multi-layered anchor protection are presented in .... inspections and investigations in late 2000 and early 2001, the goal of ..... next, carrying temporary out-of-balance effects during construction.
[ NewDirectionsPostTensioningVol1.pdf - Read/Download File

soils and foundations - ICC
dance with Section 1613, an investigation shall be con- ducted and ... A soil investiga- tion is required for the design of all post-tensioned slabs on ... load- bearing soils, the effect of moisture variation on soil-bear- ing capacity ... Compacted fill material properties and testing in accor- ..... 1805.4.2.5 Protection of concrete.
[ Chapter 18_Soils and Foundations.pdf - Read/Download File

BD 54/15 - Standards for Highways
Feb 1, 2015 ... for the management of post-tensioned concrete bridges. .... PTSI Site Investigation – A detailed investigation of a bridge involving, .... The Risk Assessment should identify the hazards that could affect a structure and the associated .... Moreover, the slab helps to protect the beams from the ingress of salts ...
[ bd5415.pdf - Read/Download File

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