ERRATA REPORT

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Publication Number: FHWA-HRT-13-028 Date: October 2013

Publication Number: FHWA-HRT-13-028
Date: October 2013

Guidelines for Sampling, Assessing, and Restoring Defective Grout in Prestressed Concrete Bridge Post-Tensioning Ducts

Dear Customer:
Editorial corrections were made to this report after it was originally published. The following table shows the modifications that were made to this report.

Location	Incorrect Values	Corrected Values
Table 32 on page 90	CD3 0.08 < Cl⁻ ≤ 0.20^b	CD3 0.2 < Cl⁻ ≤ 0.50^b
Table 33 on page 91	CD3 0.02 < Cl⁻ ≤ 0.50	CD3 0.2 < Cl⁻ ≤ 0.50

Table 32. CD classifications as determined by grout Cl⁻ levels from an option 1 inspection and resultant recommended actions.

CD^a
CD1	Cl⁻ ≤ 0.08	X
CD2	0.08 < Cl⁻ ≤ 0.20		X
CD3	~~0.08 < Cl⁻ ≤ 0.20^b~~ 0.2 < Cl⁻ ≤ 0.50^b			X
CD4	Cl⁻ > 0.50^b				X
Action		Grade
Action		1	5	7	9
A1	None	X
A2	Expand sampling			X	X
A3	Reinspect in 5 years		X
A4	Reinspect in 2 years			X	X
A5	Tendon monitoring			X	X
^a Chloride concentration units are wt percent cement. ^b If strand corrosion or fracture(s) are found (PD5 or PD6 under option 2 in table 33 ), then grade 9 or 10 should be assigned as appropriate per option 2 actions.

Table 33. CD and PD classifications as determined by grout Cl⁻ levels and in-place grout structure by an option 2 inspection and resultant recommended actions.

Action		1	2	3	4	5	6	7	8	9	10
CD^a
CD1	Cl⁻ ≤ 0.08	X	X	X	X
CD2	0.08 < Cl⁻ ≤ 0.20					X	X
CD3	~~0.02 < Cl⁻ ≤ 0.50~~ 0.2 < Cl⁻ ≤ 0.50							X	X
CD4	Cl⁻ > 0.50									X	X
PD
PD0	Sound grout	X
PD1	Grout air pocket		X	X	X	X	X	X	X	X	X
PD2	Exposed strand/tendon			X	X	X	X	X	X	X	X
PD3	Soft or segregated grout				X	X	X	X	X	X	X
PD4	Tendon surface corrosion (no section loss)						X	X	X	X	X
PD5	Tendon surface corrosion (< 5 percent section loss)								X	X	X
PD6	Tendon with partial or full fracture (≥ 5 percent section loss)										X
Action		Grade
A1	None	X	X
A2	Expand sampling							X	X	X	X
A3	Reinspect in 5 years				X	X	X
A4	Reinspect in 2 years							X	X	X	X
A5	Tendon monitoring							X	X	X	X
A6	Consider repairing deficiency as necessaryb		X	X	X	X	X	X	X	X	X
A7	Structural evaluation/load rating										X
A8	Tendon replacement										X
^a Chloride concentration units are wt percent cement. ^b This applies to PD1, PD2, and PD3.

Page Owner: Office of Research, Development, and Technology, Office of Infrastructure, RDT

Topics: research, infrastructure, structures
Keywords: research, structures, Post-tensioned tendons, Bridges, Corrosion, Grout, Chlorides, Grout defects, Inspection, Sampling
TRT Terms: research, infrastructure, Facilities, Structures
Scheduled Update: Archive - No Update needed

This page last modified on 01/06/2014