ASTM C 1812 : 2015

Name: ASTM C 1812 : 2015
Brand: ASTM
Price: 62.61 GBP

Superseded

View Superseded by

Standard Practice for Design of Journal Bearing Supports to be Used in Fiber Reinforced Concrete Beam Tests

Available format(s)

Hardcopy , PDF

Superseded date

16-09-2015

Language(s)

English

Published date

01-07-2015

Publisher

American Society for Testing and Materials

CONTAINED IN VOL. 04.02, 2015 Specifies the design of journal-bearing type rollers to support each end of fiber-reinforced concrete beams tested using Test Method C1399/C1399M or Test Method C1609/C1609M.

1.1This practice prescribes the design of journal-bearing type rollers to support each end of fiber-reinforced concrete beams tested using Test Method C1399/C1399M or Test Method C1609/C1609M. The roller design is intended to provide a consistent and relatively low value of effective coefficient of friction at the beam supports. The bearing design incorporates metal-on-metal sliding surfaces lubricated with grease.

Note 1:During the progress of a test, a crack or cracks open on the underside of the beam between the loaded third points causing the underside of each portion of the beam to move away from the center. The design is intended to provide for unlimited rotation of the roller at the point of contact with the test beam in response to this motion.

Note 2:The design of the supporting rollers is a significant factor in determining the magnitude of the arching forces that cause error in flexural test results.2 Improperly designed supporting rollers can influence the apparent flexural behavior of fiber-reinforced concrete beams.3 The effective coefficient of friction can be determined using a method similar to that described by Bernard.4

1.2Units—The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.

1.3This 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.

Committee	C 09
DocumentType	Standard Practice
Pages	7
PublisherName	American Society for Testing and Materials
Status	Superseded
SupersededBy	ASTM C 1812/C1812M : 2015 : EDT 1

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