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Description of ASTM-C779 2012ASTM C779 / C779M - 12Standard Test Method for Abrasion Resistance of Horizontal Concrete SurfacesActive Standard ASTM C779 / C779M | Developed by Subcommittee: C09.62 Book of Standards Volume: 04.02 ASTM C779 / C779MSignificance and Use 4.1 The three test methods provide simulated abrasion conditions, which can be used to evaluate the effects on abrasion resistance of concrete, concrete materials, and curing or finishing procedures. They may also be used for quality acceptance of products and surface exposed to wear. They are not intended to provide a quantitative measurement of length of service. 4.2 The equipment used by each of these procedures is portable and thus suitable for either laboratory or field testing. The three procedures determine the relative wear of concrete surfaces as follows: 4.2.1 Procedure A The revolving-disk machine operates by sliding and scuffing of steel disks in conjunction with abrasive grit. 4.2.2 Procedure B The dressing-wheel machine operates by impact and sliding friction of steel dressing wheels. 4.2.3 Procedure C The ball-bearing machine operates by high-contact stresses, impact, and sliding friction from steel balls.
Note 2 Diagrams of three machines meeting these specifications are shown in Fig. 1 , Fig. 2 , and Fig. 3 . 4
FIG. 1 Revolving Disks Abrasion Test Machine
FIG. 2 Dressing Wheel Abrasion Test Machine
FIG. 3 Ball Bearing Abrasion Test Machine
PROCEDURE AREVOLVING DISKS
1. Scope 1.1 This test method covers three procedures for determining the relative abrasion resistance of horizontal concrete surfaces. The procedures differ in the type and degree of abrasive force they impart, and are intended for use in determining variations in surface properties of concrete affected by mixture proportions, finishing, and surface treatment. They are not intended to provide a quantitative measurement of the length of service that may be expected from a specific surface. 1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the inch-pound units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of each other. 1.3 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. ( Warning Fresh hydraulic cementitious mixtures are caustic and may cause chemical burns to skin and tissue upon prolonged exposure.) 2
Note 1 Other procedures are available for measuring the abrasion resistance of concrete surfaces in addition to
the three procedures contained in this test method. Consideration should be given to Test Methods C944 and C418 . The test method most closely representing service conditions should be
used.
ASTM Standards C418 Test Method for Abrasion Resistance of Concrete by Sandblasting C670 Practice for Preparing Precision and Bias Statements for Test Methods for Construction Materials C944 Test Method for Abrasion Resistance of Concrete or Mortar Surfaces by the Rotating-Cutter Method Keywords abrasion; concrete; impact; surface treatments; wear ; ICS Code ICS Number Code 91.100.30 (Concrete and concrete products) DOI: 10.1520/C0779_C0779M-12 ASTM International is a member of CrossRef. ASTM C779 / C779MThe following editions for this book are also available...This book also exists in the following packages...Subscription InformationMADCAD.com ASTM Standards subscriptions are annual and access is unlimited concurrency based (number of people that can access the subscription at any given time) from single office location. For pricing on multiple office location ASTM Standards Subscriptions, please contact us at info@madcad.com or +1 800.798.9296.
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About ASTMASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. ASTM’s leadership in international standards development is driven by the contributions of its members: more than 30,000 of the world’s top technical experts and business professionals representing 150 countries. Working in an open and transparent process and using ASTM’s advanced electronic infrastructure, ASTM members deliver the test methods, specifications, guides, and practices that support industries and governments worldwide. |
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