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NCHRP Report 621:

Acceptance Tests for Surface Characteristics of Steel Strands in Prestressed Concrete (2009)

Overview
Table of Contents

Authors

John S Lawler; James D Connolly; Andrew E N Osborn; Transportation Research Board

Description

TRB's National Cooperative Highway Research Program (NCHRP) Report 621: Acceptance Tests for Surface Characteristics of Steel Strands in Prestressed Concrete explores tests to identify and measure residues on the surface of steel pre-stressing strands and to establish thresholds for residue types found to affect the strength of the strand's bond to concrete.

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NCHRP Report 621:

Acceptance Tests for Surface Characteristics of Steel Strands in Prestressed Concrete (2009)

Get the book now

NCHRP Report 621:

Acceptance Tests for Surface Characteristics of Steel Strands in Prestressed Concrete (2009)

Overview

Authors

Description

Table of Contents

Front Matter i-x

Summary 1-2

Background to Strand Bond Uncertainty 3-3

Pretreatment and Lubrication 4-6

Residual Film 7-7

Organization of Document 8-8

Quality Control Program Development 9-9

Evaluation of Proposed Surface and Chemical Test Methods 10-12

Proposed Quality Control Test Methods 13-16

Statistical Evaluation of Results 17-18

Supplemental Investigations of Strand Bond 19-19

Strand Manufacturers 20-20

Mechanical Testing 21-21

Chemical and Surface Testing 22-24

Development of Thresholds 25-28

Interpretation of Elemental Analyses Relative to Manufacturing Processes 29-30

Development of Quality Control Program for Strand Bond 31-31

Thresholds 32-32

Computational Tool 33-34

Chapter 4 - Conclusions and Recommendations 35-35

Future Work 36-36

References 37-37

Appendix A - Review of Strand Bond Literature 38-38

Appendix B - Evaluation of Mechanical and Chemical Test Methods 39-122

Appendix C - Specifications for Standard Surface Test Methods 123-128

Appendix D - Supplemental Investigations of Strand Bond 129-129

Appendix E - Bibliography of Strand Bond 130-130

Abbreviations used without definitions in TRB publications 131-131

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