ACI PRC-303-25: Cast-in-Place Architectural Concrete Practice—Guide

Description

This guide presents recommendations for producing cast-in-place architectural concrete. The importance of specified materials, forming, concrete placement, curing, additional treatment, inspection, and their effect on the appearance of the finished product are discussed. Architectural concrete requires special construction techniques, materials, and requirements that are unique to each project. The specific recommendations and information presented in this guide should be used accordingly.

Keywords:

admixture; aggregate; architectural concrete; bush-hammer; coating; column; consolidation; cracking; curing; deflection; exposed-aggregate finish; finish; form lining; formwork; joint; joint sealant; mixture proportion; pigment; placing; quality control; release agent; repair; retarder; sealant; texture; wall.

Document Details

Author: ACI Committee 303

Publication Year: 2025

Pages: 57

ISBN: 9781641953399

Categories: Architectural Concrete, Construction Practices

Formats: Printed Document or Protected PDF/Web View

Table of Contents

CHAPTER 1—INTRODUCTION, p. 2

1.1—Introduction, p. 2

1.2—Scope, p. 2

CHAPTER 2—DEFINITIONS, p. 2

CHAPTER 3—ARCHITECTURAL CONSIDERATIONS, p. 4

3.1—Architectural features, p. 4

3.2—Architectural design, p. 5

3.3—Sealers and coatings, p. 7

3.4—Joint sealants, p. 7

3.5—Specifications, p. 8

CHAPTER 4—STRUCTURAL CONSIDERATIONS, p. 11

4.1—Cracking, p. 11

4.2—Spalling, p. 11

4.3—Deflections, p. 11

4.4—Joints, p. 12

4.5—Beams and slabs, p. 12

4.6—Columns, p. 12

4.7—Walls, p. 12

CHAPTER 5—FORMS, p. 13

5.1—General, p. 13

5.2—Materials, p. 15

5.3—Economics, p. 18

5.4—Formwork accuracy, p. 18

5.5—Form joints, p. 18

5.6—Textures and patterns, p. 19

5.7—Formwork accessories, p. 20

5.8—Form coatings and sealers, p. 22

5.9—Form release agents, p. 22

5.10—Form removal, p. 25

CHAPTER 6—REINFORCEMENT, p. 25

6.1—General, p. 25

6.2—Clear space, p. 26

6.3—Reinforcement cover, p. 26

6.4—Reinforcement supports and spacers, p. 26

6.5—Tie wire, p. 26

6.6—Zinc-coated (galvanized) reinforcing bars, p. 26

6.7—Epoxy-coated reinforcing bars, p. 27

6.8—Glass fiber-reinforced polymer (GFRP) reinforcing bars, p. 27

CHAPTER 7—CONCRETE MATERIALS AND MIXTURE PROPORTIONING, p. 27

7.1—General, p. 27

7.2—Materials, p. 27

7.3—Proportioning, mixing, and temperature control, p. 29

CHAPTER 8—PLACING AND CONSOLIDATION, p. 30

8.1—Conveying and placing, p. 30

8.2—Consolidation, p. 30

CHAPTER 9—CURING, p. 32

9.1—General, p. 32

9.2—Curing in forms, p. 32

9.3—Moisture curing, p. 32

9.4—Membrane curing, p. 32

9.5—Hot weather curing, p. 32

9.6—Cold weather curing, p. 33

9.7—Internal curing, p. 33

CHAPTER 10—ARCHITECTURAL CONCRETE SURFACE TREATMENTS, p. 33

10.1—Surface retarder, p. 33

10.2—High-pressure water jet (waterblast), p. 33

10.3—Acid etch, p. 33

10.4—Abrasive blast, p. 34

10.5—Tooling or other mechanical treatments, p. 35

CHAPTER 11—BLEMISHES AND SURFACE REPAIRS, p. 35

11.1—Blemishes, p. 35

11.2—Tie-hole plugging and patching, p. 36

11.3—Sealers and coatings, p. 37

CHAPTER 12—REFERENCES, p. 37

Authored references, p. 37

APPENDIX A—ARCHITECTURAL CONCRETE PHOTOS, p. 38

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