Guide to Shotcrete, (506R-20), 2020, This guide is a companion document to ACI 506.2, “Specification for Shotcrete,” and provides information on materials and properties of both dry-mix and wet-mix shotcrete. Most facets of the shotcrete process are covered, including application procedures, equipment requirements, and responsibilities of the shotcrete crew. Other aspects, such as preconstruction trials, craftsman qualification tests, materials tests, finished shotcrete acceptance tests, and equipment, are also discussed.

TABLE OF CONTENTS

PREFACE

Introduction

History

Applications

New developments

Research and development

PART 1—GENERAL

1.1—Scope

1.2—Definitions

1.3—References: See Part 7—References

1.4—Submittals

1.5—Preconstruction testing by contractor

1.6—Testing during construction: quality assurance and quality control

1.7—Delivery, storage, and handling

PART 2—PRODUCTS

2.1—Materials

2.2—Packaged shotcrete materials

2.3—Fiber-reinforced shotcrete

2.4—Shotcrete properties

2.5—Proportioning

2.6—Batching and mixing

PART 3—EXECUTION

3.1—Surface preparation

3.2—Joints

3.3—Alignment control

3.4—Application

3.5—Finishing

3.6—Curing

3.7—Protection

3.8—Tolerances

3.9—Repair

3.10—Acceptance

PART 4—EQUIPMENT

4.1—Introduction

4.2—Dry-mix equipment

4.3—Wet-mix equipment

4.4—Air requirements

4.5—Mixing equipment

4.6—Hoses

4.7—Nozzles

4.8—Auxiliary equipment

4.9—Plant layout and operation

4.10—Other uses of shotcrete equipment

PART 5—CREW ORGANIZATION

5.1—Introduction

5.2—Composition and crew duties

5.3—Crew qualifications

5.4—Communication

PART 6—SUSTAINABILITY

6.1—Shotcrete sustainability

6.2—Formwork reduction or elimination

6.3—Construction efficiency

6.4—Repair and rehabilitation

6.5—Creativity and efficiency of shotcrete sections

6.6—Summary

PART 7—REFERENCES

Authored references