ACI 504R 1990 RA1997

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ACI 504R-90: Guide to Joint Sealants for Concrete Structures (Reapproved 1997)

Published By	Publication Date	Number of Pages
ACI	1990	44

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Description

Most joints, and some cracks in concrete structures, require sealing against the adverse effects of environmental and service conditions. This report is a guide to better understanding of the properties of joint sealants and to where and how they are used in present practice. Described and illustrated are: the functioning of joint sealants;required properties, available materials and applicable specifications for field-molded sealants and pre-formed sealants such as waterstops, gaskets or compression seals; determination of joint movements, widths, and depths; outline details of joints and sealants used in general structures, fluid containers, and pavements; methods and equipment for sealant installation including preparatory work; performance of sealants; and methods of repairing defective work or maintenance resealing. Finally, improvements needed to insure better joint sealing in the future are indicated. New developments in field-molded and preformed sealants and their use are described together with means of measuring joint movements. Appendix C provides a list of specifications and their sources.

PDF Catalog

PDF Pages	PDF Title
1	CONTENTS Chapter l-General, p. 504R-2 Chapter 2- How joint sealants function, p. 504R-4 Chapter 3-Sealant materials, p. 504R-12 Chapter 4-Joint movement and design, Chapter 5-Joint details, p. 504R-31
2	Chapter 6-Installation of sealants, p. 504R-31 Chapter 8-Sealing in the future and concluding remarks, p. 504R- 37 Chapter 9- References, p. 504R-37 Appendix A-Layman’s glossary for joint sealant terms, p. 504R- 38 Appendix B-Key to symbols used in figures, Chapter 7- Performance, repair, and p. 504R- 40 maintenance of sealants, p. 504R- 36 Appendix C-Sources of specifications, p. 504R-41 CHAPTER l-GENERAL 1.1-Background 1.2-Purpose 1.3-Why joints are required 1.4-Why sealing is needed
3	1.5-Joint design as part of overall structural design 1.6-Types of joints and their function
4	1.7-Joint configurations CHAPTER 2-HOW JOINT SEALANTS FUNCTION 2.1-Basic function of sealants 2.2-Classification of sealants
5	2.3-Behavior of sealants in butt joints 2.6-Effect of temperature 2.4-Malfunctions of sealants 2.5 Behavior of sealants in lap joints 2.6-Effect of temperature 2.7-Shape factor in field-molded sealants
12	2.8-Function of bond breakers and backup materials 2.9-Function of fillers in expansion joints 2.10-Function of primers CHAPTER 3-SEALANT MATERIALS 3.1-General 3.2-Required properties of joint sealants
23	3.3-Available materials 3.4-Field-molded sealants
24	3.5 Preformed seals
25	CHAPTER 4-JOINT MOVEMENT 4.1- Discussion 4.2-Determination of joint movements and
26	4.3-Selection of butt joint widths for field- molded sealants
27	4.4-Selection of butt joint shape for 4.6-Limitations on butt joint widths and field- molded sealants movements for various types of sealants 4.5-Selection of size of compression seals for butt joints 4.7-Lap joint sealant thickness
30	4.8-Shape and size of rigid waterstops 4.9-Shape and size of flexible waterstops 4.10-Shape and size of gaskets and miscellaneous seals 4.11- Measurement of joint movements
31	CHAPTER 5-JOINT DETAILS 5.1- Introduction 5.2-Structures 5.3-Slabs on grade, highway, and airports CHAPTER 5- JOINT DETAILS 5.1- Introduction 5.4-Construction and installation considerations CHAPTER 6- INSTALLATION OF SEALANTS 6.1-Introduction
32	6.2-Joint construction with sealing in mind 6.3-Preparation of joint surfaces 6.4- Inspection of readiness to seal 6.5-Priming, installation of backup materials and 6.6-Installation of field-molded sealants,
34	6.7- Installation of field-molded sealants, 6.8- Installation of compression seals cold applied
35	6.9- Installation of preassembled devices 6.10-Installation of waterstops 6.11-Installation of gaskets 6.12-Installation of fillers 6.13-Neatness and cleanup 6.14-Safety precautions
36	CHAPTER 7-PERFORMANCE, REPAIR, AND MAINTENANCE OF SEALANTS 7.1- Poor performance 7.2-Repairs of concrete defects and replacement of sealants 7.3-Normal maintenance
37	CHAPTER 8-SEALING IN THE FUTURE 8.1-What is now possible 8.2-Advancements still needed CHAPTER 9- REFERENCES
38	APPENDIX A- LAYMAN’S GLOSSARY FOR JOINT SEALANT TERMS
41	APPENDIX C-SOURCES OF SPECIFICATIONS
44	SOURCES OF SPECIFICATIONS Military Specifications