Direct Tension Testing of Plain and Fiber Reinforced Concrete for Use in Additive Construction

Abstract

An understanding of the tensile capacity of plain and fiber-reinforced concrete is needed for design. Typical designs use correlations based on the flexural capacity of a prismatic beam. Because of anisotropy, however, determining tensile capacity from correlations is more uncertain in additive manufacturing. Therefore, a simple and reliable method for measuring the direct tension of concrete is needed. This paper describes and evaluates a direct tension test of fiber-reinforced concrete that is being developed in ASTM Subcommittee C09.42 on Fiber-Reinforced Concrete. Alternate specimen geometries are discussed, and select results from 100 tests are evaluated statistically. Modifications to the method for use in additive manufacturing are proposed and qualitatively described.

Department(s)

Cooperative Engineering Program

Document Type

Conference Proceeding

DOI

10.1520/STP163620200086

Keywords

additive manufacturing, concrete, direct tension, fiber-reinforced, standard development, uniaxial tension

Publication Date

1-1-2021

Journal Title

ASTM Special Technical Publication

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