ASTM-C474 2012(Redline)

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C474-12 Standard Test Methods for Joint Treatment Materials for Gypsum Board Construction (Redline)

Published By	Publication Date	Number of Pages
ASTM	2012	19

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Category: ASTM

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Description

Abstract

These test methods cover the physical testing of joint treatment materials such as joint compound, paper joint tape, glass-mesh joint tape, and an assembly of joint compound and paper joint tape. These materials are used in gypsum board construction. The test methods are detailed for the following: joint compound tests — for viscosity, shrinkage, check cracking, and putrefaction; joint tape tests — for tensile strength, width, and thickness; paper joint tape tests — for dimensional stability; assemblages of paper joint tape and joint compound — for bond of paper joint tape to joint compound and cracking of joint compound at tape edges; and glass-mesh joint tape test — for skewness.

This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

1. Scope

1.1 These test methods cover the physical testing of joint compound, paper joint tape, glass-mesh joint tape, and an assembly of joint compound and paper joint tape.

1.1.1 Joint treatment materials are specified in Specification C475/C475M .

1.1.2 The joint treatment material described in this standard are for use with gypsum board installed in accordance with Specification C840 .

1.2 The test methods appear in the following order:

1.3 The values stated in inch-pound units are to be regarded as standard. The values given in brackets are mathematical conversions to SI units that are provided for information only and are not considered standard.

1.4 The text of this standard references notes and footnotes that provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard.

1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

C11 Terminology Relating to Gypsum and Related Building Materials and Systems C472 Test Methods for Physical Testing of Gypsum, Gypsum Plasters and Gypsum Concrete C475/C475M Specification for Joint Compound and Joint Tape for Finishing Gypsum Board C840 Specification for Application and Finishing of Gypsum Board C1396/C1396M Specification for Gypsum Board D685 Practice for Conditioning Paper and Paper Products for Testing D828 Test Meth

Additional information

Joint Compound Tests:
Width	10
Skewness	13
Bond of Paper Joint Tape to Joint Compound	15
Putrefaction	8
Thickness	11
Check Cracking	7
Shrinkage	6
Cracking of Joint Compound at Tape Edges	14
Paper Joint Tape Tests
Dimensional Stability	12
Assemblages of Paper Joint Tape and Joint Compound:
Tensile Strength	9
Joint Tape Tests:
Viscosity	5
	Section
Glass-Mesh Joint Tape Test

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ASTM-C474 2012(Redline)

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