524R-16 Guide to Portland Cement-Based Plaster

524R-16 Guide to Portland Cement-Based Plaster

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Description

This guide provides information on the plastering process, including prequalification of materials, plaster tool and equipment suggestions, mixture proportions, application procedures, finish types, and troubleshooting and repair. This guide is intended for architects, engineers, designers, specification writers, contractors, plasterers, laboratory personnel, and public authorities. Portland cement-based plastering processes and properties differ in many ways from those used in the concrete trade. The equipment used to mix plaster, the methods of curing, preparation of substrates, mixture design components, material application, finishing techniques, and methods of controlling cracking are only applicable to plaster and are not appropriate for concrete. Likewise, literature specific to concrete trade practice should not be assumed exchangeable or applicable to common plastering trade practice. Differences in plastering terminology are of key importance and, therefore, an extensive list of them is provided in this guide.

Keywords: base; bonding agents; brown coat; cracking; finish coat; fresh plaster; furring; hardened plaster; scratch coat; sheathing; stucco; texture.

 

Document Details

Author: ACI Committee 524

Publication Year: 2016

Pages: 40.00

ISBN: 9781942727712

Categories: Plastering

Formats: Printed Document, PDF, ePub, or Kindle

Table of Contents

CHAPTER 1—INTRODUCTION AND SCOPE

1.1—Introduction

1.2—Scope

CHAPTER 2—DEFINITIONS

CHAPTER 3—DESIRABLE PROPERTIES OF PORTLAND CEMENT-BASED PLASTER

3.1—Fresh plaster

3.2—Hardened plaster

CHAPTER 4—PORTLAND CEMENT-BASED PLASTER MATERIALS

4.1—General

4.2—Cements

4.3—Lime

4.4—Aggregates

4.5—Water

4.6—Admixtures

4.7—Fibers

4.8—Bonding agents

4.9—Polymers

CHAPTER 5—DESIGN CONSIDERATIONS FOR PLASTER BASES

5.1—General

5.2—Ceilings

5.3—Spacing considerations for supports

5.4—Sheathing

5.5—Stress relief

5.6—Design considerations for reduction of water intrusion

5.7—Plaster sustainability

CHAPTER 6—METAL LATH PLASTER BASES

6.1—Lath

6.2—Water-resistive barrier

CHAPTER 7—LATHING ACCESSORIES

7.1—General

7.2—Outside corner reinforcements

7.3—Inside corner accessory

7.4—Casing beads

7.5—Screeds

7.6—Stress-relief joints

CHAPTER 8—METAL LATH INSTALLATION

8.1—General

8.2—Installation of metal lath plaster base

8.3—Attachment of metal lath to framework

8.4—Attachment of metal lath to solid base

CHAPTER 9—SOLID SUBSTRATE PLASTER BASES

9.1—Substrate preparation

9.2—Concrete

9.3—Concrete masonry

9.4—Clay masonry

9.5—Surface-applied bond coatings

9.6—Surface-applied bonding agents

9.7—Integrally mixed bonding agents

CHAPTER 10—PROPORTIONING AND MIXING OF PORTLAND CEMENT-BASED PLASTER

10.1—Mixture proportions

10.2—Batching and mixing

CHAPTER 11—APPLICATION OF PORTLAND CEMENT-BASED PLASTER

11.1—Approval and acceptance of plaster base

11.2—Plaster application

11.3—Application of coats

CHAPTER 12—PLASTER FINISHES

12.1—General

12.2—Color finishes

12.3—Finish-coat textures

CHAPTER 13—CURING

CHAPTER 14––PAINTS, SEALANTS, AND CAULKING MATERIALS

14.1––Paints

14.2––Sealers

14.3––Sealants and caulking

CHAPTER 15—TESTING

15.1—General

15.2—Evaluating materials

15.3—Test methods for evaluating hardened plaster

15.4—Evaluating workmanship

CHAPTER 16—TROUBLESHOOTING AND REPAIR

16.1—General

16.2—Cracking

16.3—Weak plaster

16.4—Debonding and delamination

16.5—Discoloration of plaster

16.6—Long-term deterioration

CHAPTER 17—REFERENCES

Authored references

ERRATA INFO

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