ASTM C1245/C1245M − 12 Standard Test Method for Determining Relative Bond Strength Between Hardened Roller Compacted Concrete Lifts Point Load Test

ASTM C1245/C1245M − 12 Standard Test Method for Determining Relative Bond Strength Between Hardened Roller Compacted Concrete Lifts Point Load Test

Scope*
1.1 This test method is intended for testing roller-compacted concrete specimens and covers determination of the relative bond between layers of roller-compacted concrete or other hardened concrete in multiple-lift forms of construction.

It is applicable to all types of layered roller-compacted concrete where the total depth is sufficient to meet the minimum specimen length and diameter requirements of this test method.

This test method is not intended to provide tensile strength results of the material tested.

1.2 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.

ASTM C1245/C1245M − 12 Standard Test Method for Determining Relative Bond Strength Between Hardened Roller Compacted Concrete Lifts Point Load Test

Significance and Use
4.1 This test method is used to measure the relative bond strength of roller-compacted concrete to other rollercompacted concrete by using a point load test at the joint (see Note 1).

Relative bond strength is determined using drilled cores or cast cylindrical specimens in which the bond surface is essentially normal to the longitudinal axis at approximately the mid-length of the specimen.

A splitting tensile stress normal to the bond surface is produced by applying a point load at the joint.