Specification for Grouting of Post-Tensioned Structures

Specification for Grouting of Post-Tensioned Structures

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Publisher: Post-Tensioning Institute

Description

This specification provides minimum requirements for the selection, design, and installation of cementitious grouts and ducts for post-tensioning systems used in concrete construction. It is intended for use in a wide variety of structure types, including bridges, containment structures and buildings. The 2012 edition includes significant updates include chloride testing, inclined tube testing, material certification requirements, prohibition of tendon flushing, pumping pressure and personnel qualification.

 

Document Details

Publication Year: 2017

Pages: 60.00

ISBN:

Categories: Post Tensioning

Formats: Printed Document

Table of Contents

1.0—Introduction

1.1—Scope

1.2—Uses

1.3—Key factors

1.4—Definitions

1.5—Referenced standards and specifications

1.5.1—American National Standards Institute/ American Petroleum Institute (API)

1.5.2—ASTM International 4

1.5.3—Federal Highway Administration (FHWA)

2.0—Materials

2.1—General

2.2—Portland cement

2.3—Mineral additives

2.4—Admixtures

2.4.1—Set-controlling admixtures

2.4.2—Air-entraining admixtures

2.4.3—Anti-bleeding admixtures

2.4.4—Expansion-causing admixtures

2.4.5—Corrosion inhibitors

2.5—Aggregates

2.6—Water

2.7—Ducts

2.7.1—Types of ducts

2.7.2—Duct wall thickness

2.7.2.1—Sheet metal

2.7.2.2—High-density polyethylene (HDPE)

2.7.2.3—Polypropylene (PP)

2.7.2.4—External tendons

2.7.3—Diameter of duct

2.7.4—Testing of ducts

2.7.5—Protection of ducts

2.7.6—Repair of ducts

2.8—Inlets and outlets

2.9—Duct support spacing

3.0—Design

3.1—General

3.2—Scope

3.3—Class A, B, C, and D grouts

3.3.1—Positive pressure grouting

3.3.2—Basic ingredients of grouts

3.3.3—Proportions of grout

3.3.4—Chloride ion content

3.4—Testing requirements for Class A, B, C, and D grouts

3.4.1—Class A

3.4.2—Classes B and C

3.4.3—Class D

4.0—Testing, quality control, and quality assurance

4.1—General

4.2—Scope

4.3—Materials certifications

4.4—Laboratory testing

4.4.1—Setting time test

4.4.2—Grout strength test

4.4.3—Permeability test

4.4.4—Volume change test

4.4.5—Pumpability and fluidity tests

4.4.6—Bleed tests

4.4.6.1—Wick-induced bleed test

4.4.6.2—Schupack pressure bleed test

4.4.7—Corrosion test

4.4.8—Wet density test

4.4.9—Inclined tube test

4.5—Personnel qualifications

4.6—Grouting procedures

4.6.1—Written grouting procedures

4.6.2—Mixing and placing grout

4.7—Field testing

4.7.1—Field trial tests

4.7.2—Field mockup tests

4.7.3—Production tests

5.0—Construction

5.1—General

5.2—Time to grouting and temporary corrosion protection

5.3—Preparation for grouting operations

5.3.1—Materials and equipment

5.3.2—Ducts

5.3.3—Inlets and outlets

5.3.4—Operators

5.3.5—Safety

5.3.6—Supplies

5.3.7—Testing equipment

5.4—Storage of materials

5.5—Equipment

5.5.1—General

5.5.2—Mixer, storage hopper, and screen

5.5.3—Grout injection equipment

5.5.4—Air compression

5.5.5—Equipment for thixotropic grout

5.5.6—Backup equipment

5.6—Mixing and injecting of non-thixotropic grouts

5.6.1—Batching and mixing of grout

5.6.2—Preparation for grouting

5.6.3—Grouting operations

5.6.4—Vertical grouting

5.6.5—Post-grouting operations

5.6.6—Measures to be taken after grouting

5.6.7—Record of grouting operation

5.7—Injection of thixotropic grouts

5.7.1—Grouting procedures for thixotropic grouts

5.8—Temperature considerations

5.8.1—Hot climates 45

5.8.2—Cold climates

6.0—References

Appendix A—Troubleshooting grouting problems

Appendix B—Standard test method for evaluation

of corrosion protection capability of

PT grouts (accelerated corrosion test

for grouts)

Appendix C—Inlet and outlet details

ERRATA INFO

Any applicable errata are included with individual documents at the time of purchase. Errata are not included for collections or sets of documents such as the ACI Collection. For a listing of and access to all product errata, visit the Errata page.

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